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Introduction In most robots, electricity is used for command, control, and at least one stage of actuation. Electronics are used to transport all of this electricity. Robot baby is a new high-tech bionic robot created by American researchers. There is a huge selection of pre-manufactured, standard commodity components available. Discrete components such as resistors, capacitors, and transistors; small-scale integrated circuits such as op-amps, timing chips, and motor controllers; and large-scale integrated circuits such as memory chips, digital RF receivers, and full-fledged microprocessors with billions of transistors on a chip are examples of these. Even entire computer systems are sometimes viewed as modular components. As a result, many different types of robots, including robot babies, were invented. Catalog Introduction I What is the Robot Baby? II The Robot Baby Related Video III Common Sensors Used in Robots  IV Composition Structure  V The Differences between General Robot and Robot Baby 5.1 General Robot 5.2 Robot Baby VI The Convenience of Baby Simulator VII The Development Goals of Robot Baby Ⅷ The Influence of Robot Baby Ⅸ FAQ   I What is the Robot Baby? Robot baby is a new high-tech bionic robot created by American researchers. It is named "Diego SAN" after a one-year-old baby. It was created by Hanson robotics professionals for the Machine Perception Laboratory at the University of California, San Diego 's Institute for Neural Computing. The robot baby includes a high-resolution camera that can detect people's facial emotions. It, like a genuine infant, can make a range of facial expressions, such as smiles, mugs, and frowns. He even bites his lower lip like a child and tears well up in his eyes. Just by looking at the faces, it's difficult to distinguish the difference between this synthetic child and the actual thing. For example, joy, sadness, terror, and perplexity. It will not vomit food or wet clothes like a real baby, but the robot baby is clever enough to exhibit true infant facial expressions. II The Robot Baby Related Video Video: Engaged Couples Raise Robot Babies Robot Baby Description: Reality Works for providing the RealCare Baby Simulators and support. You will know how to take care of the real baby by the robot baby. III Common Sensors Used in Robots  Robotic sensors are used to estimate the status and environment of a robot. Sensors enable robots to comprehend and quantify the geometric and physical qualities of objects in their surroundings, such as location, orientation, velocity, acceleration, distance, size, force, moment, temperature, brightness, weight, and so on. 1 Light Sensor detect light and generate a difference in voltage. 2 Temperature Sensor Detect the surrounding temperature change. 3 proximity Sensor Create a technique for the robot to avoid collisions 4 Navigation and Positioning Sensors Approximate the position of a robot. 5 Sound Sensor A microphone that detects and returns the equivalent voltage of sound. 6 Tactile Sensor A device specifying an object’s contact. 7 Acceleration Sensor A gadget used to measure acceleration and tilt Figure1  Common Sensors Used in Robots IV Composition Structure Human beings are composed of five key components at the most fundamental level: A bodily structure;A muscle system for moving the body structure; and a sensory system for receiving information about the body and its surroundings.A source of power to stimulate the muscles and sensors;A brain system that interprets sensory data and instructs the muscles on what to perform. Furthermore, while humans have intangible qualities such as intelligence and morality, the list above pretty much covers it on a physical level. The configuration of the robot infant is odder. V The Differences between General Robot and Robot Baby 5.1 General Robot The great majority of robots do share some characteristics. To begin with,  almost all robots have a moving body. Some contain merely powered wheels, while others include dozens of movable parts composed of metal or plastic. Individual segments, like bones in your body, are joined together by joints. Figure 2  Fujitsu's HOAP-1 robot PHOTO COURTESY FUJITSU AND K&D TECHNOLOGY, INC. Robots use actuators to spin wheels and pivot jointed components. As actuators, some robots employ electric motors and solenoids, while others use a hydraulic system or a pneumatic system (a system driven by compressed gases). Robots can use any of these actuator types. All of the actuators are connected to an electrical circuit. The circuit provides direct power to electrical motors and solenoids, as well as activating the hydraulic system through the use of electrical valves. The course of the pressured fluid through the machine is determined by the valves. To move a hydraulic leg, for example, the controller of the robot would open the valve connecting the fluid pump to a piston cylinder attached to that leg. The compressed fluid would cause the piston to extend, causing the leg to swivel forward. To move their segments in two directions, robots often use pistons that can push in both directions. Figure 3  NASA's Urbie climbing stairs PHOTO COURTESY NASA JPL Everything connected to the circuit is controlled by the robot's computer. To move the robot, the computer activates all of the necessary motors and valves. Most robots can be reprogrammed, which means that you can change the robot's behavior by simply writing a new program to its computer. A typical design incorporates slotted wheels that are attached to the joints of the robot. A light beam is transmitted through the slots by an LED on one side of the wheel to a light sensor on the other side. When the robot moves a specific joint, the slotted wheel rotates. The light beam is disrupted as the wheel turns. The light sensor detects the flashing light pattern and transmits it to the computer. Based on this pattern, the computer can determine how far the joint has swiveled. The same basic mechanism is employed in computer mice. 5.2 Robot Baby Unlike ordinary robots, robot babies are enhanced in a variety of ways. They not only have the same appearance as real babies, but they can also select the skin tone of other countries. Facial expressions play a vital role in how babies connect with the outside world, assisting them in developing relationships with others. The robot infant is an improvement above previous versions of the technology, which completely reassembles its jaw. figure 4  “Diego San”- a baby robot  confused (left),happy (middle) and crying (right) Hanson Diego-san was created in 2013 by the robotics businesses Hanson Robotics and Kokoro for UCSD. Experts are now using Diego to find out how babies get their mothers to smile at them so regularly. When the Hungarian-American mathematician John von Neumann proposed the concept of an autonomous robot capable of recreating itself using raw materials. Today, Neumann's vision is becoming a reality, with one notable exception: the self-replicating robot is not made of aluminum, plastics, spur gears, or sprockets. The parent robot and its offspring, a new lineage of organisms known as Xenobots, are totally biological. "It was fascinating to find that we could [create] this Von Neumann machine, but utilizing cells instead of robot parts," says co-author Sam Kriegm of Harvard and co-author of the Xenobots research published today in PNAS. Scientists construct the first 'living' devices that can reproduce. A Computer scientist at the Wyss Institute for Biologically Inspired Engineering "People have philosophized about this for a long time," says Joshua Bongard, senior author and computer scientist at the University of Vermont. "However, you may now conduct experiments to develop biological machines or machines that create biology, which in turn creates machines." It's acceptable to be perplexed. Xenobots are referred to as "machines"  despite the fact that they lack any mechanical components. Science may be evolving faster than our paradigm for discussing and even imagining this new category of machine life. "I think it challenges us to recognize that there may not be a clear dividing line between machine and organism," Bongard adds. VI.  The Convenience of Baby Simulator RealCare Baby® 3 (formerly known as Baby Think It Over® or BTIO®) is the most advanced baby simulator on the market. What does RealCare Baby mean to the educators who use this learning aid in their classrooms? We asked teachers from across the country what RealCare Baby means to them. Watch this video to hear what they told us, and why they value RealCare Baby as a training tool and learning aid for life and career skills. What RealCare Baby Means to Educators The baby simulator successfully depicts how time-consuming and hard parenthood can be. These lifelike, newborn-size manikins are ideal for usage with teenagers since they have a number of program settings that imitate an infant's fluctuating requirements and require fast response. The unexpected nature of the programmed activities demonstrates that a baby's demands do not follow a defined schedule, but are easily monitored by the facilitator. Any prenatal education program will benefit from the baby simulator. Wriggling, squirming, Moro reflex-induced jump... Look no further than this automaton for proof that artificial intelligence is thriving. Cries, coos, and burp;Abuse of records, panic, and tampering;The regular control box comes with one pair of user keys and one set of teacher keys, as well as user response sheets, a teacher correction template, a diaper, a 9V battery, and instructions. VII The Development Goals of Robot Baby Artificial intelligence that replicates robot baby behavior could assist a baby in learning from everything it encounters, just like a child does. Facial expressions are a crucial aspect of baby communication because they help babies form bonds with those around them. It is critical to educate robots on empathy by teaching them to understand human behavior and have facial emotions. Dr. Hansen's goal is to build robots that are more intelligent and sympathetic toward humans, and he believes that such emotional expression is far more important than building combat robots. The ultimate goal is for machines to feel and, more significantly, to sympathize. Ⅷ The Influence of Robot Baby Educators all over the world utilize this one-of-a-kind learning tool to teach early childhood, parenting, baby health, and sex education. This smart baby provides meaning and accountability by tracking and reporting on caregiver behavior via wireless programming. Care events, mishandled acts, time in a vehicle seat, and outfit changes are all tracked behaviors. Robot baby includes four sets of curriculum and activities to help instructors create relevant and career-focused learning experiences. The development of the robot baby is critical for scientists studying the human nervous system and doing neural computing. Although researchers acknowledge that many people will be concerned about robot babies that can build more of themselves, they feel that understanding the technology will lead to numerous benefits in the long run.   Ⅸ FAQ 1.How much does a robot Baby cost? The robots, which start at $749, are used in two-thirds of American school districts, according to the manufacturer, Realityworks. One of the benefits of the robots is meant to be the reduction of teen pregnancy, but there is little evidence that they work. 2.How does a real care Baby work? Easy operation: Baby is totally wireless. Users wear an electronic ID on a wristband that ensures RealCare® Baby 3 detects their presence. Rechareable, 6 hours charge will give 7 days operation. Realistic care: Baby requires feeding, burping, rocking and nappy changing. 3.Why do people use fake babies? Some consumers of reborn dolls use them to cope with their grief over a lost child (a memory reborn), or as a portrait doll of a grown child. Others collect reborns as they would regular dolls. These dolls are sometimes played with as if they are an infant. 4.What class gives you a fake baby? RealCare Baby® 3 (formerly known as Baby Think It Over® or BTIO®) is the world's most advanced infant simulator. Educators around the world use this unique learning aid to teach early childhood, parenting, infant health lessons, and sex education. 5.How much does an infant simulator cost? A proper response involved turning a key in its back and holding it for a while. Today, the RealCare Baby 3 infant simulator is a fantastically sophisticated, computer-programmed doll that costs up to $1,000 to replace if you lose it 6.What are the codes for baby simulator? Baby Simulator Codes (Available) PET - Redeem for reward (NEW)Coinsbaby - Redeem for 500 Coins.YAY - Redeem for 2,000 Happiness.Gems - Redeem for 250 Gems.Xmas - Redeem code for 200 Snowflakes.Snow - Redeem code for 50 Snowflakes.Snowing - Redeem code for 150 Snowflakes.Gem20 - Redeem code for 20 Gems. 7. Are the real care baby wristbands waterproof? The bracelets are also tamperproof, ensuring the designated student is completing the simulation.

Ⅰ Introduction What exactly is a microprocessor? As our lives are becoming increasingly tech-centric and thus tech-dependent,  we have to examine this critical component closely. After all, microprocessors are built into computers, laptops, and smartphones, as well as smart home devices, gaming consoles, and self-driving cars. Microprocessors are what allow these devices to function. In this blog, we will discuss microprocessor basics and their applications across industries. Catalog Ⅰ Introduction Ⅱ What is a Microprocessor? Ⅲ Microprocessor Related Video: Ⅳ Features of Microprocessor Ⅴ Evolution of Microprocessors  Ⅵ Microprocessor Types Ⅶ Characteristics of CISC and RISC  Ⅷ Differences Between CISC and RISC Ⅸ Applications of Microprocessor 9.1 Practical Diagram Examples Ⅹ Microprocessor vs. Integrated Circuit--What’s the Difference? Ⅺ FAQ   Ⅱ What is a Microprocessor? A microprocessor is a Central Processing Unit (CPU) built on a single  Integrated Circuit  (IC) in a computer. A microcomputer is a digital computer with one microprocessor that serves as the CPU. It is a programmable, multipurpose, clock-driven, register-based electronic device that reads binary instructions from memory, accepts binary data as input, processes data according to those instructions, and outputs the results. The microprocessor is composed of millions of tiny components that work together, such as transistors, registers, and diodes. Figure1：Block Diagram of a Microcomputer  A microprocessor contains three parts: an  ALU , a control unit, and a register array. The  ALU performs arithmetic and logical operations on data from an input device or memory. The control unit manages the computer's instructions and data flow. Furthermore, a register array is composed of registers denoted by letters such as B, C, D, E, H, L, and accumulator.   Ⅲ Microprocessor Related Video: How to easily use HMC5883L Compass Sensor Microprocessor Video Description: In this video, we will understand the difference between microprocessor and microcontroller. Visually both microprocessor and microcontroller almost look identical but they are different in many aspects. They are different in terms of the application in which they are used, processing power, memory, cost and power consumption. So, in this video, you will understand the difference between microprocessor and microcontroller in all these aspects. Ⅳ Features of Microprocessor   Ⅴ Evolution of Microprocessors  We can classify microprocessors based on generation or size: First Generation (4 - bit Microprocessors  ) Intel Corporation introduced the first generation of microprocessors in 1971-1972. Because it was a 4-bit processor, it was dubbed the  Intel 4004 . It was a single-chip processor. It was capable of performing basic arithmetic and logical operations such as addition, subtraction, Boolean OR, and Boolean AND. I had a control unit that could fetch an instruction from storage memory, decode it, and then generate control pulses to execute it. Second Generation (8 - bit Microprocessor) Intel introduced the second generation of microprocessors in 1973. It was the first eight-bit microprocessor capable of performing arithmetic and logic operations on 8-bit words. It was known as the  Intel 8008 , and an improved version was known as the  Intel 8088 . Third Generation (16 - bit Microprocessor) The third generation microprocessors, introduced in 1978, were Intel's 8086, Zilog Z800, and 80286, which were 16-bit processors with minicomputer-like performance. Fourth Generation (32 - bit Microprocessors  ) The 32-bit microprocessor was introduced by several companies, but the most popular is the Intel 80386. Fifth Generation (64 - bit Microprocessors) From 1995 to the present, we have been in the fifth generation. Following 80856, Intel released a new processor, the  Pentium  processor, followed by the  Pentium Pro CPU.  which enables multiple CPU  s in a single system to achieve multiprocessing. Celeron, Dual, Quad, and Octa-Core processors are also improved, 64-bit processors.   Ⅵ Microprocessor Types Microprocessors are classified into three types: CISC (Complex Instruction Set Computer) The instructions are in a complex format, as the name implies. This means that a single instruction can contain several low-level instructions. Loading data from memory, storing data in memory, performing basic operations, and so on. Furthermore, a single instruction can have multiple addressing modes. Furthermore, because there are many operations in a single instruction, they use a small number of registers. Intel 386,  Intel 486 , Pentium, Pentium Pro, Pentium II, and other  CISC  processors are examples. RISC (Reduced Instruction Set Computer) As the name implies, the instructions in this are quite simple, and thus they execute quickly. Furthermore, the instructions are completed in a single clock cycle and only use a few addressing modes. Furthermore, it employs multiple registers, resulting in less interaction with memory. Examples include the IBM RS6000, DEC Alpha 21064, DEC Alpha 21164, and others. EPIC (Explicitly Parallel Instruction Computing) It enables parallel computation of instructions through the use of compilers. Furthermore, the complex instructions operate at lower clock frequencies. It also encodes the instructions in 128-bit bundles. Each bundle contains three instructions encoded in 41 bits each, as well as a five-bit template. This 5-bit template specifies the type of instructions and which instructions can be executed concurrently.   Ⅶ Characteristics of CISC and RISC  Characteristics of  CISC are as follows: Because the instructions are complex, so is the decoding of instructions.The size of instructions is larger than the size of a single word.It is possible for an instruction to take more than one clock cycle to execute.Because most operations are performed in memory, the number of registers is reduced.Address modes are also complicated.There are more data types. Characteristics of  RISC are as follows: Because the instruction is simple, so is the decoding of instructions.The size of the instructions is less than one word.It takes one clock cycle to execute an instruction.The number of registers has increased.The address modes are also straightforward.There are fewer data types.It has the potential to be used for pipelining.   Ⅷ Differences Between CISC and RISC RISCCISCIt focuses on the software.It focuses on the hardware.Uses the hardwired control unit.It uses a hardwired as well as a microprogrammed control unit.Uses transistors for more registers.Transistors are used for storing the complex instructions.The instructions have a fixed size.The size of instructions vary.It performs only register to register arithmetic operations.Besides the register to register operations, it can also perform register to memory or memory to register operations.Fewer registers are used.It requires more number of registers.As the instructions are individual the code is large.Multiple operations are present in single instruction hence, the code is small.Executes in one clock cycle.Takes more than one clock cycle for execution.Instructions have a size of one word.The size of instructions is greater than the one-word size.Examples are IBM RS6000, DEC Alpha 21064, DEC Alpha 21164, etc.Examples of CISC are Intel 386, Intel 486, Pentium, Pentium Pro, Pentium II, etc.     Ⅸ Applications of Microprocessor Household DevicesIndustrial Applications of MicroprocessorsTransportation IndustryComputers and ElectronicsIn MedicalsInstrumentationEntertainmentEmbedded Systems at HomeOffice Automation and PublicationCommunication   9.1 Practical Diagram Examples As stated by the term microprocessor typically refers to a microcomputer's central processing unit (CPU), which contains the arithmetic logic unit (ALU) and control units. Typically, it is implemented on a single LSI chip. This separates the operation's "brains" from the rest of the computer's units.   An example of microprocessor architecture The arithmetic logic unit (ALU) and the control unit for a microcomputer are housed in the microprocessor. It is linked to memory and I/O via buses, which transport data between the units. Figure2: microprocessor architecture     Microcomputer Example A microprocessor unit (MPU), a clock, and interfaces to memory and external input/output devices are typical components of a microcomputer. The units are linked by buses that transfer data between them. Figure3: Microcomputer   Buses: The exchange of information Information is transferred between microcomputer units via buses, which are groups of conductors. Each bit of information to be passed will have one conductor, e.g., 16 lines for a 16-bit address bus. Address, control, and data buses will be present.   Figure4: microcomputer units via buses     Ⅹ Microprocessor vs. Integrated Circuit--What’s the Difference? Integrated Circuit An integrated circuit is a semiconductor chip component that contains thousands to billions of transistors. It's difficult to imagine how this is possible, but it's not done by shrinking scores of typical 3-legged NPN transistors. An integrated circuit is instead constructed by assembling the basic structure of MOS transistors on a small piece of the silicon wafer. The MOS transistors are connected in such a way that they perform the same function as a larger setup.    Microprocessor An integrated circuit is a microprocessor, but not all integrated circuits are microprocessors. The microprocessor, like Professor X, is an intelligent piece of integrated circuits. It serves as the brain of circuits that require computing power. The first microprocessors had thousands of transistors on a silicon wafer, but the number has now reached billions. The  AMD  Epyc Rome chip, which was released in 2019, contains over 39 billion transistors. A microprocessor, unlike other integrated circuits, serves as a computing brain. It can execute logical and arithmetic instructions that have been programmed into it. A microprocessor is made up of three parts: an arithmetic and logic unit (ALU), a control unit.  and a register array.   Microprocessor vs. Integrated Circuit in Electronics Design Figure5: Mind the speed when working with a microprocessor. In electronics design, you're likely to work with integrated circuits. Working with a microprocessor can be a herculean task on occasion. It's a mistake to think that designing with a microprocessor is the same as designing with traditional integrated circuits. If you skip a couple of best practices in PCB design, you can still create a successful design if you're working with common ICs like differential transceivers or logic gates. In terms of power supply and speed, these passive ICs are typically quite robust. However, if you make the same mistakes in a design with a microprocessor, you will almost certainly encounter a slew of problems in the prototype. Microprocessors are notoriously power-hungry devices that typically operate at hundreds of Hertz or Gigahertz. It should go without saying that a microprocessor is extremely sensitive to the voltage applied to it. Ripples or a sudden drop in voltage can have a significant impact on the microprocessor's stability. Because the microprocessor communicates with memory via high-speed data buses, EMI is also a concern. High-speed data exchange can be a source of EMI, affecting nearby sensitive components. When designing with a microprocessor, you can't afford to make even the smallest mistake, so using the right PCB design and analysis software is essential. Cadence OrCAD supports high-speed signal simulation to identify problems early in the design process, as well as a plethora of other tools to help you get the job done right the first time.   Ⅺ FAQ 1. What is microprocessor in simple terms? A microprocessor is an electronic component that is used by a computer to do its work. It is a central processing unit on a single integrated circuit chip containing millions of very small components including transistors, resistors, and diodes that work together. 2. Are microprocessors used today? One or more microprocessors are used today in everything from the smallest embedded systems and handheld devices to the largest mainframes and supercomputers. 3. Are microprocessors in phones? Smartphones and other mobile devices have multiple microprocessors and microcontrollers. The main processor is a microprocessor with a bus to communicate with memory on separate chips (although often included in the same IC package) and buses to communicate with the rest of the equipment. 4. Do phones have RAM? Android phones have jumped from 4GB to 8GB RAM as standard, and we're now seeing phones with 12GB and 16GB of RAM — but Apple's iPhone has always gotten by with less. 5. How do microprocessors execute instructions? The instructions which are to be executed by microprocessor are first stored in the memory of the processor and then executed. But the processor does not execute the instructions directly. It reads the instruction byte by byte and then executes it. 6. What is microprocessor chips? Microprocessor chips (MPU) are silicon devices that serve as the central processing unit (CPU) in computers. They contain thousands of electronic components and use a collection of machine instructions to perform mathematical operations and move data from one memory location to another.

IntroductionThe Raspberry Pi is a small and powerful computer that you can use to learn programming through fun, practical projects. It is designed for encouraging people in computing and creating easier access to computing education. Pi is a microcomputer and its size is like a credit card. Its system is based on Linux and has all functions such as video and audio. With the release of Windows 10 IoT, we will also be able to use the Raspberry Pi on Windows.Raspberry Pi - All You Need To KnowCatalogIntroductionⅠ Who Invented the Raspberry Pi?Ⅱ Different Pi Versions2.1 Early Stage2.2 Pi Model B vs Pi Model B+2.3 Pi 22.4 Pi 2 Model B vs Pi Model B2.5 Pi 3 Model B2.6 Pi 4 Model B vs Pi 3 Model B+2.7 Pi 4 Model B Rev1.2 (8GB RAM Version)Ⅲ What can I do with Raspberry Pi?Ⅳ Raspberry Pi Programming Language4.1 Python4.2 C Language4.3 Java/BlueJ4.4 PERL4.5 ScratchⅤ Guide for Beginners: Use Raspberry Pi to Control LED Lights5.1 Model Selection5.2 Accessories5.3 Electronic Components5.4 System Installation5.5 SSH Login In5.6 Install Node5.7 Light LED5.8 LED Control Script5.9 HTTP ServerⅥ FAQⅠ Who Invented the Raspberry Pi?The Raspberry Pi was developed by the Raspberry Pi Foundation, an British charity. In March 2012, Eben Upton of the University of Cambridge officially launched the world’s smallest desktop computer, also known as a card computer, which has all the basic functions of a computer. This is Raspberry Pi. The purpose of this foundation is to promote the education of computer science and related subjects in schools and make computers interesting. The foundation expects that this computer will continue to be developed and applied to more fields in the world.The early concept of Raspberry Pi in 2006 was based on ATmega644 microcontroller. It is an ARM-based microcomputer motherboard, with SD/MicroSD card as the memory hard disk. There are 1/2/4 USB ports and a 10/100 Ethernet port around the card motherboard (type A does not have a network port), which can be connected keyboard, mouse and network cable, as well as a TV output interface for video analog signals and an HDMI high-definition video output interface. All the above components are integrated on a motherboard that is only slightly larger than a credit card. It has all the basic functions of a PC and only needs to be connected to the TV. And the keyboard can perform many functions such as spreadsheets, word processing, games, high-definition video and so on.The Raspberry Pi is produced through three companies with production licenses Element 14/Premier Farnell, RS Components and Egoman. The Raspberry Pi Foundation provides ARM-based distributions of Debian and Arch Linux for the public to download. It is also planned to provide support for Python as the main programming language, support for programming languages such as Java, BBC BASIC (via RISC OS image or "Brandy Basic" clone of Linux), C and Perl. Ⅱ Different Pi Versions2.1 Early StageIn the early days of the Raspberry Pi, there were two types, model A and model B. The main differences between them.Model A: 1 USB, no wired network interface, power 2.5W, 500mA, 256MB RAM.Model B: 2 USB, support wired network, power 3.5W, 700mA, 512MB RAM. In addition, the Raspberry Pi B model provides a computer board, power supply, keyboard, case or connection, but no RAM.In July and November 2014, the Raspberry Pi launched two models, B+ and A+, respectively. The main difference: Model A has no network interface, so the four USB ports are reduced to one. In addition, compared to Model B, Model A has reduced RAM capacity and has a smaller size. Model A can be said to be a cheap version of Model B, but the new model Model A also supports the same MicroSD card reader as Model B, 40-pin GPI port, Broadcom BCM2385 ARM11 processor, 256MB of memory and HDMI output port.In terms of configuration, model B+ uses the same BCM2835 chip and has 512MB RAM as model B. But compared with the previous generation, the B+ version has lower power consumption and more interfaces. Model B+ has increased the general-purpose input and output pins to 40, and the USB interface has also increased from 2 to 4. In addition, the power consumption of model B+ has been reduced by about 0.5W to 1W. The old SD card slot has been replaced with a more beautiful push-in microSD card slot, and the audio part uses a low-noise power supply. From the appearance point of view, the USB interface has been moved to the side of the motherboard, the composite video has been moved to the position of the 3.5mm audio port, and four independent mounting holes have been added.2.2 Pi Model B vs Pi Model B+In July 2014, the Pi Model B+ was released, still using the BCM2835 processor and the same system software as the previous generation. The RAM is still 512MB. But improvements have been made in the following key points:Figure 1. Raspberry Pi Model B1) More GPIO pins, a total of 40 pins. (The old version is 26 pins)2) 4 USB ports, and the hot swap and overcurrent protection have been improved.3) Use Micro SD slot not the SD.4) Lower power consumption, reducing power consumption by 0.5 to 1W.5) Audio optimization, the audio circuit uses a dedicated low-noise power supply.6) A more concise appearance, the B+ aligns the USB interface with the edge of the circuit board, removes the AV interface, and makes 4 fixing holes on the motherboard.2.3 Pi 2Figure 2. Raspberry Pi 2It is compared to previous generations.1) CPU single thread speed is increased by 1.5 times (up by 1.5x).2) Sunspider running score increased 4 times (4x faster).3) Multi-core video decoding rate based on NEON is increased by 20 times (20x faster).4) The overall multi-threaded CPU score of SysBench is 6 times (6x) that of the old version.2.4 Pi 2 Model B vs Pi Model BFigure 3. Raspberry Pi 2 Model B1) Equipped with a 900MHz quad-core ARM Cortex-A7 CPU, the performance is expected to be 6 times that of the previous B+ version.2) 1GB LPDDR2 SDRAM, twice the previous B+ version.3) Fully compatible with the Pi 1 generation.Since the CPU has been upgraded to the ARM Cortex-A7 series, the Raspberry Pi 2 will support the full range of ARM GNU/Linux distributions, including Ubuntu and even Windows 10.2.5 Pi 3 Model BFigure 4. Pi 3 Model BIn February 2016, the Raspberry Pi 3 Model B was released.1) Equipped with ARM Cortex-A53 1.2GHz 64-bit quad-core ARMv8 CPU.2) Add 802.11b/g/n wireless network card.3) Add low-power Bluetooth 4.1 adapter.4) The maximum drive current is increased to 2.5A.2.6 Pi 4 Model B vs Pi 3 Model B+Figure 5. Pi 4 Model B1) Equipped with Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz.2) VideoCore VI GPU, supports H.265 (4Kp60 decode), H.264 (1080p60 decode, 1080p30 encode), OpenGL ES 3.0 graphics.3) 1GB/2GB/4GB LPDDR4 memory.4) Full throughput Gigabit Ethernet (PCI-E channel).5) Support Bluetooth 5.0, BLE.6) Two USB 3.0 and two USB 2.0 ports.7) Dual micro HDMI output, support 4K resolution.8) The microSD storage system adds double data rate support.9) The previous version of the microUSB power supply interface has been changed to a USB Type-C interface in Pi 4 Model B.10) Increase driving current to 3A.2.7 Pi 4 Model B Rev1.2 (8GB RAM Version)On May 28, 2020, the Raspberry Pi Foundation announced the launch of the new Raspberry Pi 4B SKU, which is the 8GB RAM version. In order to make full use of it, Raspberry Pi also developed a dedicated 64-bit operating system based on Debian. In other respects, compared with the previous version, the power supply problem has been improved.Figure 6. Pi 4 Model B Rev1.2TMHW's test on the Pi 4B 8GB version shows that in terms of web performance, 7zip compression, and APP opening speed, 8GB does not even increase but decrease compared to 4GB. In addition, in a 32-bit system, the available RAM is 7.8GB, and a 64-bit system is reduced to 7.6GB. Ⅲ What can I do with Raspberry Pi?Just like any other desktop or portable computer running a Linux system, there are many things you can do with the Raspberry Pi. Of course, it is inevitable that there is a little difference. Ordinary computer motherboards rely on hard drives to store data, but for Raspberry Pi, SD cards are used as "hard drives", and you can also connect an external USB hard drive. Use Raspberry Pi to edit documents, browse the web, play games, etc. That is to say, it has a wide range of uses. So it is also a good choice to make it an excellent multimedia center. For example, the Pi can be used to play video, and it can even be powered through the USB interface of the TV.Figure 7. Raspberry Pi 4Ⅳ Raspberry Pi Programming Language4.1 PythonThe Pi in Raspberry Pi stands for Python. It has become one of the most famous programming languages used for coding. After all, it has been in continuous use for the past 20 years. Python has an easy-to-read syntax, which is very suitable for novices in the field. Now, it is widely used in modern applications, windows and online applications.4.2 C LanguageC is one of the most widely used computing languages in the world. It is widely used to create operating systems and even simple programming languages. As we all know, Raspberry Pi runs on Linux system, in fact, it is also written with C. Therefore, it is easily compatible with all Linux and Unix systems including Pi.4.3 Java/BlueJWhen it was first released, Java was hailed as the first language that allowed programmers to write code for any platform or operating system. Regardless of whether the platform is a windows machine or a Unix machine. You can run the program without rewriting the code. Once the code is compiled, it can be run anywhere. Java runs on the Raspberry Pi, but cannot be developed on it. By 2013, BlueJ was released. Once installed, it can be programmed in Java on the Raspberry Pi.4.4 PERLPERL is a high-level programming language. It can be conveniently used on the Raspberry Pi when building an automated process or analyzing and debugging its output. Perl has a better library and ecosystem. It is the default setting of Raspberry Pi. Through a simple meta-analysis of the quality of existing libraries, PERL can be updated to a better version, because the default library may be incomplete or of low quality.4.5 ScratchScratch is the second programming language that suitable for Raspberry Pi. Because this coding language is included with the Raspberry Pi kit. It is a visual programming tool. With it, you can create animations and games. The latest version allows programmers to control Raspberry Pi's GPIO (General Purpose Input and Output) pins. Ⅴ Guide for Beginners: Use Raspberry Pi to Control LED Lights5.1 Model SelectionRaspberry Pi is a tiny computer integrated on a circuit board. Currently, there are two latest (1) Raspberry Pi 3 Model B(2) Raspberry Pi zero (zero w)Although the latter is cheap, it lacks a lot of interfaces (for example, only one USB port), the CPU and memory are relatively low-capacity, and the accessories are also few. Therefore, it is recommended to buy the third-generation B-type. But zero w can also meet most of the needs.5.2 AccessoriesThe Raspberry Pi itself is just a host. If you want to run it, there must be accessories.(1) Power SupplyA mobile phone charger with a Micro USB interface can be used as a power source, but the output must be 5V voltage and at least 2A current. It’s okay to use a power bank as a power source.Figure 8. Micro USB(2) Micro SD CardThe Raspberry Pi does not have a hard drive, and the Micro SD card is the hard drive. The minimum capacity is 8G, and 16G and 32G cards are recommended.Figure 9. Micro SD(3) DisplayThe Raspberry Pi has HDMI output, and the display must have it. If there is an HDMI to VGA adapter cable, then the VGA monitor will also work. Here I use a 7-inch LCD monitor.Figure 10. LCDHowever, the monitor is only needed when installing the system, and SSH can be used to log in later.(4) Wireless Keyboard and MousePi has built-in Bluetooth, so USB or Bluetooth wireless keyboard and mouse can be used.Figure 11. Wireless Keyboard and MouseJust like the monitor, if the Pi has been installed with the system and only used as a server, the wireless keyboard and mouse are not required.5.3 Electronic ComponentsIn addition to accessories, the following experiment also requires some electronic components.(1) Breadboard (one piece)(2) Electrical Cable (several)Note that the connection cable must be female to male.Figure 12. Electrical Cable (Female)Figure 13. Electrical Cable (Male)In addition, it is best to prepare some cables with male to male.(3) LED Diodes (several)(4) 270Ω Resistors (several)5.4 System InstallationIf the merchant has already installed the system, you can skip this step, otherwise you need to install the operating system.The official operating system is Raspbian, which is a customized version of the Debian system.The official also provides an installer NOOBS. It is recommended to install Raspbian through it, which is relatively simple.Download NOOBS:1) Format the Micro SD card into FAT format (operation guide).2) Unzip NOOBS.zip to the root directory of the Micro SD card.3) Insert the Micro SD into the slot at the bottom of the Raspberry Pi, turn on the power, and start the system.4) Under normal circumstances, follow the prompts on the screen and press Enter all the way to install the system.5.5 SSH Login InAfter installing the system, the Pi can access the Internet (Wifi or network cable). At this time, you need to check its LAN IP address, you can use the following command.    $ sudo ifconfigThen, change the system settings and turn on SSH login (default is forbidden).Then, login the Raspberry Pi from another computer SSH. The following command is executed on another computer in the LAN.    $ ssh pi@192.168.1.5In the above code, 192.168.1.5 is the address of my Raspberry Pi, so you need to replace it with yours. The default user of the Raspberry Pi is pi, and the initial password is raspberry. Under normal circumstances, you can log in to it. Then, you can perform various server operations, such as changing the password.    $ passwdThe following experiments need to add users to the gpio user group.    $ sudo adduser pi gpioThe above code means adding user pi to the gpio user group.5.6 Install NodeIn order to run Node scripts, Raspberry Pi must install Node. You can refer to this.    $ curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -    $ sudo apt install nodejsUnder normal circumstances, Node 8.x has been installed successfully.    $ node -v    v8.1.05.7 Light LEDPi provides a set of external IO interfaces, called GPIO (general-purpose input/output).Figure 15. GPIO PinsThe definition of its 40 pins is shown in the figure below.Figure 16. Raspberry Pi 40 PinsNote that the first pin (3.3V) in the upper left corner is a square, and the other pins are round. Turn the Raspberry Pi over, and you can see that one corner of the GPIO is square. In this way, you can confirm which pin eye is 3.3V.Through GPIO, the Pi can be connected with other electronic components. Next, according to Jonathan Perkin's article, connect LED diodes.Figure 17. Raspberry Pi BackA breadboard is needed here. In essence, a breadboard is just a few wires with many holes that can be connected to the wires.Figure 18. Connect with BreadboardThe + pole and the-pole are two vertical wires, the row marked with the numbers 1, 5, and 10 is a horizontal wire. The wires are not connected to each other, and the left and right halves of the breadboard are also not connected to each other.Then, connect the Raspberry Pi, breadboard, LED lights, and resistors according to the diagram below.Figure 19. Parts ConnectionIn the above figure, the red wire represents the positive electrode of the current, which is connected from the first pin (3.3V) of the GPIO to the breadboard. The black wire represents the negative electrode of the current, which is connected from the 6th pin (ground) of the third row of the breadboard. It does not matter which hole they connect to the breadboard, but it must be ensured that a complete circuit can be formed (the direction of the arrow in the figure above). Note that LED diodes also have positive and negative poles, with the long pin indicating the positive pole and the short pin indicating the negative pole. The resistor has no positive and negative poles.After the connection is complete, turn on the power and the LED should light up.5.8 LED Control ScriptNext, we use the Node script to control the LED.First, unplug the positive wire from pin 1 (3.3V) and plug it into pin 11 of row 6 (GPIO 17 in the figure above). The current of this pin can be controlled by the script.Then, create a new experiment directory on the Pi, and install the Node module rpio that controls GPIO.    $ mkdir led-demo && cd led-demo    $ npm init -y    $ npm install -S rpioNext, create a new script led-on.js.    // led-on.jsvar rpio = require('rpio');    // Turn on pin 11 (GPIO17) as output    rpio.open(11, rpio.OUTPUT);    // Specify the output current of pin 11 (HIGH)    rpio.write(11, rpio.HIGH);Run this script and you can see the LED bulbs light up.    $ node led-on.jsCreate a new led-off.js script, just change one line (see here for the complete code).    // led-off.js    //...    // Designate Pin 11 to stop output current (LOW)    rpio.write(11, rpio.LOW);Run this script and the LED bulb should be off.    $ node led-off.jsWith these two scripts, it is easy to make the LED blink. Create a new led-blink.js script.    // led-blink.js    var rpio = require('rpio');    rpio.open(11, rpio.OUTPUT);    function blink() {      rpio.write(11, rpio.HIGH);      setTimeout(function ledoff() {        rpio.write(11, rpio.LOW);      }, 50);    }    setInterval(blink, 100);The above script makes the LED blink 10 times per second.    $ node led-blink.js5.9 HTTP ServerMany things can be done by controlling the LED, such as setting up an HTTP server. Whenever someone visits, the LED will blink.First, install a server module in the directory just now.    $ npm install -S serverThen, create a new script server.js.    // server.js    var server = require('server');    var { get } = server.router;    // ...    server({ port: 8080 }, [      get('/' ,  ctx => {        console.log('a request is coming...');        blink();      }),    ]);    console.log('server starts on 8080 port');Run this script.    $ node server.jsThen, open a command line terminal, access port 8080, and the LED will flash.    $ curl http://localhost:8080After reading the tutorial, you can try it yourself. For example, if you write a test case script, the LED will stay light as long as the test fails, or you can assemble an 8-bit adder. Ⅵ FAQ1. What is Raspberry Pi and how does it work?The Raspberry Pi is a tiny computer about the size of a deck of cards. It uses what's called a system on a chip, which integrates the CPU and GPU in a single integrated circuit, with the RAM, USB ports, and other components soldered onto the board for an all-in-one package.2. What is the Raspberry Pi used for?The Raspberry Pi is a low cost, credit-card sized computer that plugs into a computer monitor or TV, and uses a standard keyboard and mouse. It is a capable little device that enables people of all ages to explore computing, and to learn how to program in languages like Scratch and Python.3. Can Raspberry Pi replace PC?Of course, the Raspberry Pi can't replace most professional desktops, but in general, it can run almost all programming languages and frameworks, from Python to Fortran.4. What do I need to use a Raspberry Pi?What you will need:A Raspberry Pi computer with an SD card or micro SD card.A monitor with a cable (and, if needed, an HDMI adaptor)A USB keyboard and mouse.A power supply.Headphones or speakers (optional)An ethernet cable (optional)5. Which Raspberry Pi is best for beginners?Best Raspberry Pi Starter KitsCanaKit Raspberry Pi 3 B+ Starter Kit 32GB EVO+ Edition Premium Black Case.Vilros Raspberry Pi 3 B+ Complete Starter Kit with Clear Case and 16GB SD Card.Smraza Raspberry Pi 3 B+ Starter Kit, Compatible Pi 3 Model B Case, 16GB SD Card, 2.5 A Power Supply.6. What projects can you do with Raspberry Pi?Best Raspberry Pi Projects for 2021Google Enabled Magic Mirror.Solar-Powered Pi.Game Console.Remote-Controlled 3D Printer.Language Translator.Satellite Tracking Globe.PC Hardware Stats Monitor.Security Camera.7. Which is cheaper Arduino or Raspberry Pi?The two most popular among them are: Arduino and Raspberry Pi. Arduino is based on the ATmega family and has a relatively simple design and software structure. Raspberry Pi, basically is a single-board computer.8. Which programming language is used for Raspberry Pi?Python. One of the most widely used programming languages on the Raspberry Pi is none other than Python. Python has an easy, beginner-friendly syntax (arrangement of words, phrases, in sentences) and a wide adoption rate among the community, giving access to libraries, frameworks, and tools to help users get started.9. Can a Raspberry Pi run Windows?The Raspberry Pi 4 can handle Microsoft Edge, the calculator app, and more, all via the power of Windows 11. It can even run Minecraft, albeit in an undesirable state.10. Can you watch Netflix on Raspberry Pi?Although there are some Android images for the Raspberry Pi, Linux distributions (distros) for the Pi are more stable. And with newfound Widevine DRM support, the Raspberry Pi can comfortably stream Netflix, Hulu, Disney+, HBO Max, and Spotify.11. Can you hack with Raspberry Pi?The Raspberry Pi also runs Raspbian, the official OS of the Raspberry Pi. This Debian-based OS can also be used to learn basic Linux and hacking tools, although it requires much more customization before it's suitable for this.12. Which is better for beginners Arduino or Raspberry Pi?The Arduino board is much simpler to use in comparison to Raspberry Pi. The Arduino board can easily be interfaced with analog sensors and other electronic components using only a few lines of code. ... The coding in Arduino is also easier than Raspberry Pi, the latter requiring knowledge of Linux and its commands.13. How do I put codes into my Raspberry Pi?Open IDLE by selecting the Raspberry Pi logo in the top-left, and click Programming > Python 3 (IDLE). You should be presented with the Python interactive interpreter. To write a program, go to File > New File. Enter in your code.14. Can I run Android on Raspberry Pi?First Look: You Can Now Run Android 12 on Your Raspberry Pi 4 Computer. Even if your smartphone doesn't run Android 12 yet, you can now use Google's latest mobile operating system on a Raspberry Pi 4, 400 or CM4 computer.15. What is the advantage of Raspberry Pi over Arduino?Raspberry Pi is 40 times faster than Arduino, with PI, you can send mails, listen music, play videos, run internet etc. Also as we have stated earlier that it has memory, processor, USB ports, Ethernet port etc. and it doesn't require external hardwares for most of the functions.16. How do I use Raspberry Pi with IOT?Connecting the Raspberry Pi to the Outside World - GPIO PinsTo connect the GPIO to external sensors, you can: Connect the sensors directly to the GPIO pins using jumper wires. Connect the GPIO pins to a ribbon cable, which in turn connects it to a breadboard.17. Which is more powerful Raspberry Pi or Arduino?Given those differences you might think a Raspberry Pi is so much more powerful and capable than Arduino, so you should use that. ... Raspberry Pi has 8. Individual I/O pins in Arduino can drive 40mA while Raspberry Pi GPIO pins can each drive a maximum of 16mA18. How many devices can connect to Raspberry Pi?There is a limit of 30 simultaneously connected devices on Pi 4 - the hardware supports 32 device address slots but one address is kept free for unconfigured devices and one address is reserved by the internal USB2. 0 hub for the USB2. 0 ports.19. How many pins are there on Raspberry Pi board?40 pinsOf the 40 pins, 26 are GPIO pins and the others are power or ground pins (plus two ID EEPROM pins, which you should not play with unless you know your stuff!).20. How much RAM does the Raspberry Pi has?The Raspberry Pi 2 has 1 GB of RAM. The Raspberry Pi 3 has 1 GB of RAM in the B and B+ models, and 512 MB of RAM in the A+ model. The Raspberry Pi Zero and Zero W have 512 MB of RAM. The Raspberry Pi 4 is available with 2, 4 or 8 GB of RAM.21. Why is Raspberry Pi 4 so expensive?Due to supply shortages, the Raspberry Pi Foundation can no longer afford to produce them at that price, and so have had to increase the price to $45. ... To help mitigate this price increase, the company is reintroducing the 1GB version of the RPi 4, which was retired in February 2020.22. How do you do Pi in Google Sheets?Creating the PI Symbol with the CHAR FunctionThe amazing CHAR function, which converts numbers into characters per the Unicode table, can output the symbol for pi in your Google Sheet.

ⅠIntroduction This project mainly introduces how to DIY a Simple Audio Player with  Amplifier LM386 . But before this project, it is very essential to know some basics of LM386. Therefore, the first of this article is about LM386 audio amplifiers and the second part we will have a look at the practical appliance of Simple Audio Player with Amplifier LM386. Catalog ⅠIntroduction Ⅱ Amplifier LM386 Related Video: Ⅲ LM386 Basics 3.1 LM386 Datasheet 3.2 LM386 Pinout 3.3 LM386 Features Ⅳ  Project Introduction 4.1 Hardware Required 4.2 Getting Ready with Your WAV Audio Files: 4.3 Circuit 4.4 Code 4.5 Working of this Arduino Music Player: Ⅴ FAQ How to make an LM386 audio amplifier circuit Amplifier LM386 Video Description: In this Video, We will explore how to use the popular LM386 class AB audio amplifier IC to build a simple mono 1 watt audio amplifier.  Ⅲ LM386 Basics Despite the fact that LM386 audio amplifiers are quite old. They do, however, have a lot of useful information. Assume your audio player has poor sound quality. You want to boost the volume. They are a good option. Because of the low voltage supply and the fact that it works well with a battery.   3.1 LM386 Datasheet You completed an audio circuit  . However, the sound is too faint. Many people use the LM386 to boost the sound to a speaker. The LM386 is a low-power audio amplifier. Also, you should be able to work with a battery,  It has a similar shape to  IC-741  and DIP-8. So, small and simple. Even if it's small, it makes a big sound. But...better. it's If you have previously read the LM386 Datasheet.   3.2 LM386 Pinout Figure1:pinout In DIP-8, we frequently use the LM386. There are only a few pin connections. Other packets are also the same. For example, SOP-8, TSSOP-8, and so on.   3.3 LM386 Features   Ⅳ  Project Introduction Including sounds or music in our project will always make it look and sound much more appealing. If you're working with an  Arduino  and have a lot of free spins, you can easily add sound effects to your project by purchasing an extra SD card module and a standard speaker. In this article, I'll show you how to play music and add sound effects with your  Arduino board, as well as introduce the IC LM386 Amplifier  , which we'll use in this process. We will play the.wav music files stored on an SD card in this project. The Arduino will be programmed to read these.wav files and play the audio on a speak through an LM386 Audio amplifier.   Figure2: Project     4.1 Hardware Required Arduino Due Board8-ohm speaker or headphonesArduino shield with an SD card with cs CS 4 (like the Ethernet shield)Components to build an external audio amplifierLM386 (low power audio amplifier)10 kohm potentiometer10 ohm resistor2 x 10 µF capacitor0.05 µF (or 0.1 µF) capacitor250 µF capacitor   4.2 Getting Ready with Your WAV Audio Files: The audio file to be stored on the SD card must be in.wav format and have 44100 Hz, 16-bit stereo quality. We need audio files in.wav format to play sounds from an SD card using Arduino because the Arduino Board can only play audio files in a specific format, which is wav format. There are many mp3 shields available for use with Arduino to create an Arduino mp3 player. Alternatively, to play mp3 files in Arduino, there are websites that will convert any audio file on your computer into that specific WAV file.   4.3 Circuit The shield is placed on top of the Due, and a micro-SD card is inserted into the slot. The card's root directory contains a.wav file called "test.wav." For a quick test, connect a pair of headphones to the ground and DAC0 while keeping the polarity in mind. To add a speaker to the board, connect an amplification circuit between the DAC0 pin and the speaker. The amplification circuit will boost the speaker's volume,  There are numerous audio amplifiers available, with the LM386 being one of the most common. The following scheme demonstrates how to construct the circuit using the LM386 and a variety of components. You can power the LM386 by connecting the Vs pin to various voltage sources, such as the +5 V on the Arduino Due's 5V pin or an external 9V  battery,  The capacitor is connected to pins 1 and 8 of the LM386 provides the amplifier's gain. The gain is set to 200 with the 10 F capacitor, and 50 without the capacitor. The volume of the amplifier can be adjusted using the potentiometer. Caution: Do not connect the speaker directly to the Arduino Due's pins.   Figure3 : Circuit   Figure4: LM386 mounting on breadboard   4.4 Code   4.5 Working of this Arduino Music Player: Simply press the button connected to pin 2 after programming your Arduino, and your Arduino will play the first song (saved as 1.wav) for you. You can now press the button again to change your track to the next song, 2.wav. Similarly, you can listen to all four songs. You can also play/pause the song by pressing the pin 3 button. Press it once to pause the song and once more to resume it from where it left off. Watch the video below to see the entire process in action (or maybe to relax with some songs). I hope you had a good time with the project. It is now up to your imagination to incorporate them into your projects. You can create a speaking clock, voice assistant, talking robot, voice alert security system, and many other things.   Ⅴ FAQ 1. How many watts is LM386? 700mW, mono, 5- to 18-V, analog input Class-AB audio amplifier. 2. How do you calculate LM386 gain? Voltage Gain Analysis: Without any external components, it has a gain of Gv = 2x15K/(150+1350) = 20 (26 dB). With a capacitor (or shortcutting) between pins 1 and 8 , it has a gain of Gv = 2x15K/150 =200 (46dB). 3. Is LM386 any good? The LM386 is a well-designed, basic workhorse that does a decent job when its hooves are kept clean and it's well-fed. Aside from having a slow op-amp stage by today's standards, it has decent performance. It can also sound horrible if you neglect it. 4. What is an audio amplifier circuit? The circuit of the audio amplifier consists of a transistor a device to apply the input signals and a speaker at the output. The transistors are connected based on the necessity. The important factors that need to be considered while designing a audio amplifier is gain,noise, frequency response and distortion. 5. Which amplifier can be used for audio amplifier? An audio power amplifier (or power amp) is an electronic amplifier that amplifies low-power electronic audio signals such as the signal from radio receiver or electric guitar pickup to a level that is high enough for driving loudspeakers or headphones. 6. What is the need of power amplifier? The function of a power amplifier is to raise the power level of input signal. It is required to deliver a large amount of power and has to handle large current. The characteristics of a power amplifier are as follows − The base of transistor is made thicken to handle large currents.

IntroductionAs the most popular open-source hardware in the world, Arduino is not only an excellent hardware development platform, but also a trend in hardware development. Its simple development method makes developers pay more attention to creativity and realization, complete their own projects and get experiments faster, which greatly saves the cost of learning and shortens the development cycle. There are too many want to say, in short, arduino provides a lot of convenience for many electronics enthusiasts and creators, and also provides a platform for sharing their results. So what exactly is it? How does it work?CatalogIntroductionⅠ What is Arduino?Ⅱ Who Make the Arduino?Ⅲ Why Use Arduino?Ⅳ What Does Arduino Have?Ⅴ Arduino Programming LanguageⅥ Arduino Basic ArchitectureⅦ Copyright and PaymentⅧ Simple Arduino Projects8.1 Video Demonstration8.2 Examples and Programming CodesⅨ FAQⅠ What is Arduino?Arduino is a tool that can be used to sense and control the physical world more than your desktop computer. It consists of an open source-computer platform based on a simple single-chip microcomputer, and a development environment for writing programs for the Arduino board.Arduino can be used to develop interactive products. For example, it can read a large number of switches and sensor signals, and can control a variety of lights, motors, and other physical devices. The Arduino project can be a standalone project, or it can communicate with programs running on your computer (for example: Flash, Processing, MaxMSP) at runtime. You can choose to manually assemble the Arduino board yourself or buy a productthe, because open-source IDE can be downloaded for free.The Arduino programming language seems to be correspondingly connected to a physical computing platform, which is based on a programming environment that handles multimedia.Learn Arduino in 15 MinutesⅡ Who Make the Arduino?Massimo Banzi was a teacher at a high-tech design school in Ivrea, Italy. His students often complain about not being able to find cheap and easy-to-use microcontrollers. In the winter of 2005, Massimo Banzi discussed this problem with David Cuartielles. He is a Spanish chip engineer who was a visiting scholar in this school at the time. The two decided to design their own circuit boards and introduced David Mellis (Banzi student) to design a programming language for the circuit boards. Two days later, David Mellis wrote the code. After another three days, the circuit board was completed. Massimo Banzi likes to go to a bar called di Re Arduino, which was named after the Italian king Arduin 1,000 years ago. To commemorate this place, he named this circuit board Arduino.Figure 1. The Making Arduino Core Team Ⅲ Why Use Arduino?There are many single-chip microcomputers and their platforms that are suitable for the design of interactive systems. For example: Parallax Basic Stamp, Netmedia's BX-24, Phidgets, MIT's Handyboard and others provide similar functions. With all these tools, you don't need to care about the cumbersome details of MCU programming. Arduino provides you a set of easy-to-use toolkits. Arduino also simplifies the process of working with a single-chip microcomputer, but compared with other systems, it has many advantages in many places. In fact, it is especially suitable for teachers, students and some amateurs:0️⃣Cheap1️⃣Cross-platform2️⃣Simple programming environment3️⃣The software is open-source and expandable.4️⃣Hardware is open-source and expandable. Ⅳ What Does Arduino Have?At the beginning of Arduino development, its application environment was clarified, and an open-source platform was designed to facilitate its secondary development. The main features of Arduino are as follows:1) Open-source circuit diagram design. The program development interface is free to download, or you can modify it according to your needs. Arduino carries low-priced microcontrollers (ATmega8 or ATmega128). It can be powered by a USB interface, no external power supply, and an external 9VDC input can also be used.2) Support ISP online programming, making the Bootloader firmware into the chip. The Arduino controller contains the Bootloader program, which is the first piece of code that runs after the system is powered on. It is like the program in the BIOS of the PC. It performs self-check after startup, configures the port, and so on. Of course, the microcontroller relies on programming the fuse. Set the startup from the boot area after power-on, and use this program to directly store the program sent from the serial port in the flash area. Therefore, when using the Arduino compilation environment to download the program, first reset the microcontroller and start the Boodoader program to guide the program sent from the serial port to be successfully written into the flash area. The flash can be programmed repeatedly, so it is very convenient to update the software. After having Bootloader, you can update the firmware through the serial port or USB to RS232 line.3) According to the official PCB and SCH circuit diagrams, the Arduino module can be simplified to complete independent micro-processing control.4) It can be easily connected with sensors and various electronic components, such as infrared, ultrasonic, thermistor, photoresistor, servo motor, etc.5) Support a variety of interactive programs, such as Flash, Max/MSP, VVVV, PurEDAta, C, Processin, etc.In terms of application, the use of Arduino can break through the interactive content of devices that can only use mouse, keyboard, CCD and other input devices in the past. For example, it can achieve single-player or multi-player game interaction more simply. The functional characteristics of Arduino make it more and more widely used. Ⅴ Arduino Programming LanguageUsually, the Arduino language we say refers to a collection of various application programming interfaces (APIs) provided by the Arduino core library files. Arduino uses C/C++ to write programs. Although C++ is compatible with C language, these are two languages. C language is a process-oriented programming language, and C++ is an object-oriented programming language. The early Arduino core library was written in C language, and later object-oriented ideas were introduced. At present, the latest Arduino core library is written in a mixture of C and C++.The Arduino language is a program framework that starts with setup() and loop() as the main body. setup() is used to initialize variables, pin modes, call library functions, etc. This function only runs once, and its function is similar to "main()" in C language. For the loop() function, the statements in the function are executed in a loop.Arduno language modularizes some parameter settings related to AVR microcontroller, including EEPROM, Ethernet, LED matrix, steering gear, stepping and TWI/I2C control library. It does not require the user to directly deal with the underlying system, which can improve the efficiency of application development. Ⅵ Arduino Basic ArchitectureThe Arduino system has also developed different versions based on different application environments. The "Arduino Duemilanove" version is used as an example to introduce the Arduino system. This version was developed in 2009 and is based on the atmega328 microcontroller board. During use, connect the computer with a USB cable or use a power adapter to power it.1) One 9V DC input provides external power output for the Arduino board, so that the Arduino control board has the ability to drive high-power external devices such as steering gear.2) One USB port used to connect the computer. The Arduino IDE uploads the control program written by the user to the control board, and at the same time, it can also supply power to the circuit board and drive low-power external devices through this port.3) 14 digital input/output terminals, among which ports 0 (RX) and 1 (TX) are respectively connected to the serial pins of the main control chip to receive and send TTL serial data. Among them, ports 2 and 3 can receive external signals to realize external interrupt function. Ports 3, 5, 6, 9, 10, 11 are used as PWM ports, which can be used for motor PWM speed regulation or music playback. Port 10 (SS), 11 (MOSI), 12 (MISO) and 13 (SCK) can provide SPI communication mode with the support of SPI module library. Port 13 is connected with an LED indicator, which can open and close with the change of the level on pin 13.4) 6 analog input/output ports, of which port 4 (SDA) and port 5 (SCL) can realize I2C communication.5) One 5V DC output and one 3.3V DC output, which can provide 3.3V and 5V DC power supplies for other circuits.6) One reset interface.The Arduino system is developed based on a single-chip microcomputer, and a large number of common and standard electronic components are used on it. The entire design, including hardware and software, is released in an open source manner. Therefore, the cost of procurement is relatively low. In various electronic production competitions, Arduino is used as a development platform for creative design of electronic artwork.Figure  2. Arduino Board Terminals🔺Arduino Hardware✔️There are many motherboard, such as:Arduino UnoArduino NanoArduino LilyPadArduino Mega 2560Arduino EthernetArduino DueArduino LeonardoArduinoYún✔️There are many expansion boards for Arduino, such as:Arduino GSM ShieldArduino Ethernet ShieldArduino WiFi ShieldArduino Wireless SD ShieldArduino USB Host ShieldArduino Motor ShieldArduino Wireless Proto ShieldArduino Proto Shield Ⅶ Copyright and PaymentIn order to maintain the open-source concept of the design, Arduino decided to adopt the Creative Commons license, which is a license similar to GPL that appears to protect open copyright activities. Because copyright law can regulate open-source software, but it is difficult to use it on hardware. Having this license, anyone is allowed to produce copies of circuit boards, redesign, and even sell copies of the original design. You don't need to pay royalties, or even get permission from the Arduino team. However, if you republish the reference design, you must sign the original Arduino team. In addition, if you adjust or modify the circuit board, your latest design must use the same or similar license to ensure that the new version of the Arduino circuit board will be free and open. In other words, only the name Arduino is reserved, and it is a trademark now. If someone wants to sell a circuit board under this name, they must pay a small trademark fee to the Arduino core development members. Ⅷ Simple Arduino Projects8.1 Video DemonstrationBasic Projects with Arduino8.2 Examples and Programming Codes🔺Water Lamp ControlInsert 6 LED lights on the breadboard, among which the long pins are assigned to the 6, 7, 8, 9, 10, 11 ports of arduino respectively, the short pins are all connected to the blue wire of the breadboard, and then one port of the blue wire is connected to the GND port of the arduino. Figure  3. Water Lamps ConnectionCode:void setup(){ pinMode(6,output);pinMode(7,output);pinMode(8,output);pinMode(9,output);pinMode(10,output);pinMode(11,output);}void loop(){digitalWrite(6, LOW);digitalWrite(7,HIGHT);delay(200);digitalWrite(7, LOW)；digitalWrite(8,HIGHT);delay(200);digitalWrite(8,LOW);digitalWrite(9,HIGHT);}🔺Using the Buzzer to Realize the AccordionThe buzzer is set according to different frequencies, so set the corresponding buzzer frequency based on the level of the switch interface.void setup(){pinMode(8,INPUT);  //switch setdigitalWrite(8, HIGH);pinMode(9,INPUT);digitalWrite(9, HIGH); piMode(10,INPUT);digitalWrite(10, HIGH); pinMode(11,OUTPUT) //light setpinMode(12, OUTPUT)pinMode(13,OUTPUT)}void loop(){if(digitalRead(8)==LOW){tone(7,2093);  //the buzzer frequency is set to 2093digitalWrite(11, HIGH);}else{notone(7);digitalWrite(11,LOW);}Repeat 2 switch values down;;; 🔺Breathing LightThe so-called breathing is relatively stable, so it cannot flicker and go off like a flashing LED. So analog output is used, and the current changes continuously.Figure  4. Breathing Light ConnectionCode:void setup(){pinMode(11,OUTPUT);  }void loop(){for(int i=0;i<30;i++){analogWrite(11,i);   //analog signal input, the range of i is [0,255];delay(10);}for(int j=29;j>0;j--){analogWrite(11,j);delay(10);}} Among them, the corresponding relationship between the analog signal voltage and the digital signal voltage:How is the analog signal realized to control the voltage within a range in a cycle?Figure  6. PWMAs shown in the figure, “on” belongs to 5V, and “off” belongs to 0V. In a time period, that is, when a pulse is sent, the duration of “on” in the previous figure is 25%, and the “off” is 75%. The voltage value calculated like this: v0=5*25%+0*75%=1.25(v). It can be simply understood like this. 🔺Breathing Water Lampvoid  setup(){pinMode(3, OUTPUT);pinMode(5, OUTPUT);pinMode(6, OUTPUT);pinMode(9, OUTPUT);pinMode(10, OUTPUT);pinMode(11, OUTPUT);}int  ports[6]=[3,5,6,9,10,11];int i=0，level=0; set loop(){ analogWrite(ports[i], level);delay(10);++level %=7;++i %=6;  i is incremented first, and then modulo 6, that is, i is always in the range of 0~5；}🔺Vibrating LEDPhotoresistor, resistor, LED are required;Connect one end of the photoresistor to 5V, the other end to the resistor, and the resistor to GND. Pull out a wire between the two and connect to analogIn;Figure  7. Vibrating LED ConnectionCode:void setup(){Setrial.begin(9600);}void loop(){Setril.printIn(analogWrite(0));  //the middle wire is connected to port 0, which is the serial output port；delay(200);} 🔺Electric BellWhen energized, electromagnetic induction produces magnetic force, the switch (oscillator) is attracted and pulled down; When the power is cut off, the coil loses its magnetism, the switch is restored, and then energized. That is, repeat the cycle. This is also the principle of crystal oscillator.Figure  8. Electric Bell DiagramCode:void setup(){pinMode(9,OUTPUT);Setrail.begin(9600);}void loop(){Setrail.printIn(analogRead(0));analogWrite(9, map(analogRead(0), 400,700,0,255);   //map(a1,b1,a2,b2), that is, the original range of values [a1,b1] is mapped to [a2,b2];delay(200);} Ⅸ FAQ1. What is an Arduino used for?Arduino is an open-source electronics platform based on easy-to-use hardware and software. Arduino boards are able to read inputs - light on a sensor, a finger on a button, or a Twitter message - and turn it into an output - activating a motor, turning on an LED, publishing something online.2. Is Arduino illegal?The hardware designs of Arduino are open source; it is allowed to copy and further develop the designs. Note that in case a copy uses the Arduino name and/or logo on it, this board is no longer a copy but a counterfeit which is illegal to manufacture and sell.3. Can Arduino run C++?First, the Arduino compiler/IDE accepts C and C++ as-is. In fact many of the libraries are written in C++. Much of the underlying system is not object oriented, but it could be. Thus, "The arduino language" is C++ or C.4. Is Arduino easy to learn?Arduino is cost-effective and easily accessible. Arduino is easier to learn as a programming language as it is a simplified version of the C++ programming language. Arduino is cross-platform which makes it easy to run on any sort of device compared to other microcontrollers which can only run on windows.5. What is the difference between Arduino and Raspberry Pi?The main difference between them is: Arduino is microcontroller board, while Raspberry Pi is a microprocessor based mini computer (SBC). The Microcontroller on the Arduino board contains the CPU, RAM and ROM. All the additional hardware on Arduino Board is for power supply, programming and IO Connectivity.6. Why is Arduino so popular?So the Arduino hardware is easy, the Arduino IDE is simple, and the code itself is much easier to comprehend (than trying to program an off-the-shelf microcontroller). ... Another reason Arduino is so popular is because there are many people using it which means there's a lot of examples out there to work with.7. Can I sell my Arduino project?Yes, with the following conditions: Physically embedding an Arduino board inside a commercial product does not require you to disclose or open-source any information about its design. ... You may manufacture and sell the resulting product.8. Do you have to use the Arduino IDE?Can I program an Arduino board without the Arduino IDE? Yes, you can use Create web editor to program your board without the need of download the classic IDE.9. Can I use Python in Arduino?Arduino uses its own programming language, which is similar to C++. However, it's possible to use Arduino with Python or another high-level programming language. In fact, platforms like Arduino work well with Python, especially for applications that require integration with sensors and other physical devices.10. What language does Arduino code in?Arduino is programmed with a c/c++ 'dialect'. Most c/c++ will work but much of the standard libraries will not work.11. Which language is best for Arduino?Any language that has a compiler that generates Arduino compatible machine code will be perfect. As of this moment , a subset of C / C++ is the only language that is supported by the Arduino IDE.12. How do I program an Arduino?1) Use your Arduino Uno on the Arduino Web IDE.2) Use your Arduino Uno on the Arduino Desktop IDE. Install the board drivers. Open your first sketch. Select your board type and port. Upload the program. Learn more on the Desktop IDE.3) Tutorials.13. Can Arduino connect to WiFi?Connect your Arduino to the internet by adding ESP8266 WiFi Module ... Adding this module to your Arduino UNO will open you to more and exciting projects.14. Can an Arduino run Linux?Arduino have a couple of boards that support running a variant of Linux called Linino: The Arduino Yún is a microcontroller board based on the ATmega32u4 and the Atheros AR9331. The Atheros processor supports a Linux distribution based on OpenWrt named Linino OS.15. What should I learn before Arduino?Before learning Arduino you need to have knowledge of basic programming. You can choose any language like C, C++ or Java. And apart from that you need to have basic idea about electronic devices like which part it is?, How it works? etc.16. Where do I program Arduino?Arduino programs are written in the Arduino Integrated Development Environment (IDE). Arduino IDE is a special software running on your system that allows you to write sketches (synonym for program in Arduino language) for different Arduino boards.17. How many types of Arduino are there?Top 6 Different Types of ArduinoArduino UNO. The development of Arduino UNO board is considered as new compared to other Arduino boards.LilyPad ArduinoArduino MegaArduino LeonardoArduino Red BoardArduino Shields18. Is Arduino good for beginners?Arduino is easily accessible - even for those who don't know much about electronics. Arduino boards are simple a type of microcontroller. They are able to read inputs from the sensors and turn those inputs into output. Arduino is the best for beginners looking to get started with electronics for the first time.19. Which is more powerful Raspberry Pi or Arduino?Given those differences you might think a Raspberry Pi is so much more powerful and capable than Arduino, so you should use that. ... Raspberry Pi has 8. Individual I/O pins in Arduino can drive 40mA while Raspberry Pi GPIO pins can each drive a maximum of 16mA.

Ⅰ IntroductionA computer  whether it is a laptop  or a desktop has a Motherboard where a small amount of memory known as  CMOS  (complementary metal-oxide-semiconductor) stores the BIOS  settings. Hardware settings, system time, and date are the parts of BIOS  settings. BIOS  protects the data each time the computer  turns off. If  CMOS loses its power the system clock resets.CatalogⅠ IntroductionⅡ CMOS Battery Related VideoⅢ Computer BIOS Ⅳ What is a CMOS Battery ?Ⅴ What is the Lifeline of CMOS Battery?Ⅵ How do I Know My CMOS Battery Failed? Ⅶ How to Replace A CMOS Battery?7.1 Step 1: Remove the Previous CMOS Battery7.2 Step 2：What To Do After Taking Out The Battery？Ⅷ FAQ Ⅱ CMOS Battery Related VideoHow to remove cmos battery in your pc? Cmos reset / hard reset on biosCMOS Battery Video Description:In this video I will teach you how to remove your cmos battery  in your pc whether be in  ATX  or  mATX  or mini ITX motherboard  . Removing the cmos battery  for 5 minutes will give a hard reset on your motherboard  and this will clear unnecessary issues like wrong overclock, no video signal and seeing the "reboot and select proper boot drive" in your display Ⅲ Computer BIOS To comprehend the significance of a CMOS battery  , you must first comprehend what your computer  's BIOS  is.BIOS is pre-programmed into the hardware of every computer,  It is not the same as an operating system. Operating systems  can be installed, uninstalled, and updated long after the computer  has been purchased. BIOS  is something that is built into the computer  during the manufacturing process.BIOS is an abbreviation for "Basic Input/Output System." What exactly does it accomplish? Essentially, it manages your computer  's essential functions.All computer  s operate based on inputs and outputs. Assume you're launching a software application:An input is when your CPU  sends an instruction to your hard disk to retrieve the software program from storage.Your hard disk retrieves the data from the software program and sends it back to your CPU  ; this is output.The program is executed by your CPU,  It sends instructions to your graphics processor, instructing it on what image to create; an input.Your graphics processor then sends instructions to your monitor on how to arrange the pixels on the screen to create the image; this is output.Everything your computer  does can be reduced to an input or an output. The BIOS  is in charge  of managing your computer's exchange of inputs and outputs, mostly when you boot it up. BIOS  instructs your computer on how to boot up the operating system and also controls peripherals (such as the mouse and keyboard). To turn on your laptop  , you press the power button, correct? So, how is your laptop  supposed to process the power button when it is off? That is what the BIOS operated. While your computer is still waking up, it performs basic functions for it. The basic input is to press the power button. The basic output is that your operating system boots up. Next We will look at CMOS battery,  Ⅳ What is a CMOS Battery ?On your motherboard.  the motherboard  battery, also known as the CMOS (Complementary Metal-Oxide Semiconductor), functions as an RTC (Real-Time-Clock). Inside your computer.  the CMOS acts as a battery-powered semiconductor chip that stores important data. This information includes the system time, date, and system hardware settings, which are required for your computer to boot and load properly. All of this data is kept safe by a near-quarter-sized lithium battery located directly on the computer's motherboard, Figure1:CMOS battery Ⅴ What is the Lifeline of CMOS Battery?CMOS is also referred to as CMOS RAM, Non-Volatile RAM (NVRAM), or a real-time clock (RTC). The lifespan of a CMOS battery  is nearly ten years. It will differ depending on the computer's usage and environment. CMOS is used in devices such as static RAM (SRAM), microcontrollers, digital logic circuits, and microprocessors.When the computer is unable to display the correct date and time, the CMOS battery  has failed. The original button does not appear on all motherboard  s. Some of the most basic types of customization features are expansion port speed configuration, boot device order, memory handling, and power control.As we all know from personal experience, batteries do not last forever. Batteries will cease to function after a certain time. This could happen anywhere between two and ten years after the device is manufactured. If your computer is turned on, its battery will last longer than if it is turned off. Unlike other types of batteries, these are not rechargeable, and doing so may result in an explosion. Ⅵ How do I Know My CMOS Battery Failed?The following are the symptoms of CMOS battery  failure:The laptop  is having trouble booting up.The motherboard  emits a constant beeping noise.The date and time have been reset.Peripherals are not responsive or respond incorrectlyHardware drivers have vanishedYou are unable to connect to the internet.When your CMOS battery  dies, your BIOS firmware will shut down and reset to factory setting. Problems with booting up and constant beepingAs previously stated, BIOS is primarily responsible for booting up your  computer ,  Your laptop  may have a difficult time booting up without the battery, or it may not boot up at all. You may also hear a constant beeping noise from the motherboard.  which is another sign of a battery failure.Date and time from a long, long time agoIf your laptop  boots, you may notice that the date and time have been reset. They've most likely reset to a date in the distant past. Even when your computer is turned off, BIOS keeps a real-time clock that keeps track of the date and time. That procedure is maintained by CMOS (which is sometimes referred to as a real-time clock in and of itself). If the date and time have mysteriously reset, it's a good indication that the CMOS battery  has died.Keyboard performance is erratic.It's possible that your peripherals aren't responding; for example, you can't move your cursor or click on any icons, and the laptop  isn't reading any of your keyboard inputs.Alternatively, your peripherals may be thrown out of whack; your cursor may be inaccurate, and your key inputs may result in strange responses from the operating system.Alternatively, your customized keyboard configuration has been reset to the default. Because BIOS is in charge  of managing peripherals at startup, these are all indications of CMOS failure.Drivers vanishIf you've installed any drivers on your computer.  such as those for your home printer, a CMOS failure may cause those drivers to vanish (you'll need to download and reinstall them).There is no internet connection.You may also be unable to connect to the internet if your battery dies. BIOS is in charge  of keeping hardware and network drivers up to date.One thing you should be relieved about is that CMOS failure usually does not result in the loss of any personal files. Nothing in storage has been harmed. Once you've replaced the battery, you'll still have access to all of your photos, videos, and documents. Failure of ttery  Ⅶ How to Replace A CMOS Battery?Ground yourself before you touch your patient. That means making sure that any static electricity (which can be generated in small charge  s between your body and clothing but is weak enough not to hurt you) does not pass through the delicate computer parts, which may seem insignificant but can seriously damage some of the more delicate components inside your case.Important points include placing your computer case on a non-conductive (non-metallic) table or surface before opening it for treatment and standing on bare feet in contact with the floor. 7.1 Step 1: Remove the Previous CMOS BatteryTo do so, open your computer's case and locate the CMOS battery on the  motherboard ,  If you're treating a laptop.  you'll need to open the laptop  's back panel. Because it resembles a large silver coin sitting on your motherboard  , the CMOS battery is easy to locate. Figure2:motherboard The battery in most systems and laptops is held in place by a small clip next to it. Simply slide the battery out from under the clip like a big round SIM card, and you'll have the troublesome little silver coin in your hand.Also, under no circumstances should the clip be bent.As a result, it will be unable to hold the new battery in place. You're treating your computer.  and as the saying goes, "first not harm."Figure3:new battery And there is one more thing;In some laptops, the CMOS battery may be covered with non-conductive protection and attached to two wires that are connected to the laptop's motherboard  via a connector similar to this:Figure4: laptop's motherboardAnd, you know, it's also possible that you can't find the CMOS battery on your laptop's back panel;Because some manufacturers do not allow battery replacements, and if you are still insistent on removing the battery;In any case, you can look online for a 'how to disassemble your laptop' tutorial video.Like on the YouTube;And this will help you understand how to disassemble your laptop because the CMOS battery may be attached to the other side of your laptop's motherboard, Here's a picture of the laptop without a CMOS battery in the back panel:Figure5: back panel So, whatever battery type your computer is using, simply disconnect or remove it.Even if the CMOS Battery is soldered to the motherboard  in the following manner:Figure6:Battery is soldered 7.2 Step 2：What To Do After Taking Out The Battery？You have to now purchase the same CMOS battery for your laptop or computer that you recently removed from your laptop or computer, So, you'll need to go to a computer store or order the battery online. Whatever you do, make certain that you purchase the same type of battery. Ⅷ FAQ1. How do I get the CMOS out of the motherboard without damaging it?Use a flat head screwdriver, push the metal tab back away from the battery.  It should not take much force, and the battery will just pop out.2. Is the CMOS battery the same battery found in Automotive Key Fobs?Excellent question, YES!  The CR2032 can be found in many devices from calculators, wrist watches, medical devices, toys, and many more.3. Can a motherboard run without a battery?Technically, YES.  Removing the CMOS battery will allow your computer to run however, you will lose the date and time settings, the computer will boot with default BIOS settings or you will have to choose the drive that the OS is installed every time you start your computer.4. Will removing the motherboard battery reset BIOS?This is an excellent question I get asked alot.  The short answer is YES.  If you remove the battery, wait approximately 5 minutes and then reconnect the battery.5. Can a CMOS battery cause a black screen?A faulty battery removes all of your boot settings.  It is very possible to see nothing but a black screen when booting up a computer with a dead CMOS.  For example if you have a secondary video adapter that your monitor is plugged into and your BIOS has reset to default settings, your onboard video would be the new display and not your primary video adapter.