Uno R3 Board compatible with Arduino Looking to buy the Uno R3 CH340G ATMEGA328P Development Board for your next Arduino project? Look no further! Iotcart, your trusted online source for electronic components in India, offers this exceptional development board, fully compatible with Arduino Uno R3 projects. The Uno R3 CH340G ATMEGA328P Development Board is more than just a microcontroller board; it's a gateway to endless possibilities in the world of electronics and programming. Crafted with precision and a focus on durability, this board is engineered to meet the demands of both beginners and experienced enthusiasts. Its versatility knows no bounds – whether you're into robotics, IoT, home automation, or creative automation projects, this board is your ideal companion. The plug-and-play design, along with a user-friendly interface, makes it easy to use, even for those new to Arduino. Under the hood, it boasts an ATmega328P microcontroller with a CH340G USB-to-serial converter chip, ensuring seamless data transfer and efficient performance. You'll be amazed at how this development board accelerates your Arduino projects. Now, let's talk price. At Iotcart, we believe in offering the best value for your investment. You can purchase the Uno R3 CH340G ATMEGA328P Development Board at a competitive price, with no hidden charges. Plus, we provide reliable, nationwide shipping to ensure your order reaches you in the fastest time and in perfect condition. Read our blog smart dustbin project using Arduino detailing Arduino code for making a smart dustbin, the required components, and the circuit diagram for making an automatic dustbin project. If you want to use this Uno R3 Board compatible with Arduino in your small or DIY projects, for that you will need few essential components like Breadboards Jumper wires batteries or power supply BO motors Motor drivers Sensors check out : Arduino Uno R3 compatible Board ( Pack of 25) Comparison of Arduino Uno Boards: Specification UNO Wifi UNO SMD  UNO R3 Microcontroller ATmega4809 ATmega328P (SMD) ATmega328P (Through hole) USB connector Micro-USB USB-B USB-B Digital I/O Pins 14 14 14 Analog input pins 6 6 6 PWM pins 5 6 6 UART Yes Yes Yes I2C Yes Yes Yes SPI Yes Yes Yes I/O Voltage 5V 5V 5V Input voltage (nominal) 7-12V 7-12V 7-12V DC Current per I/O Pin 20mA 20 mA 20 mA Power Supply Connector Barrel Plug Barrel Plug Barrel Plug clock speed 16 MHz 16 MHz 16 MHz USB-Serial chip ATmega16U2 CH340 ATmega16U2 SRAM 6.144KB 2KB 2KB Flash Memory 48KB 32KB 32KB EEPROM 256 Bytes 1KB 1KB Dimensions 68.6 mm x 53.4 mm 68.6 mm x 53.4 mm 68.6 mm x 53.4 mm RADIO MODULE u-blox NINA-W102 - - Inertial Measurement Unit LSM6DS3TR (3D accelerometer) - - LED_BUILTIN 25 13 13 Wi-Fi Microprocessor Yes - - APPLICATIONS: Arduino Music Instrument Robot Car Fingerprint door lock Home Automation Security systems What is an UNO R3 (Arduino Compatible) Board? Package Includes: 1 x UNO R3 Board compatible with Arduino Specifications: Microcontroller  ATmega328 Input Voltage 7-12V Operating Voltage  5V Digital I/O Pins  14 Analog Inputs  6 Flash Memory 32K Clock Speed 16MHz Dimensions  5 x 4 x 3cms Weight  25 grams

Arduino Nano R3 Development Board Compatible with Arduino The CH340 Soldered Nano Board R3 chipboard is based on the famous Arduino platform and does all the functions of Uno, but with a smaller footprint. The Nano board compatible with Arduino equips a low-cost USB-Serial Chip that makes it reliable and suitable for projects based around Arduino. The Nano microcontroller board is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano R3).  The CH340 Nano microcontroller board can be powered via the mini-USB connection, 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected as the highest voltage source. The size of Nano V3.0 with CH340 Chip is only 43 mm x 18 mm. It comes with 6 PWM I/O from a total of 14 digitals I/O, 8 analog inputs, 16Mhz clock speed, and 32kB of flash memory. read more : Node to Node communication on LoRa with Arduino Nano and ESP32 Note: User need to download CH341S64.SYS driver and use it with old bootloader settings in the arduino IDE. Key

Due AT91SAM3X8E ARM Cortex-M3 The Due is a microcontroller board based on the Atmel SAM3X8E ARM Cortex-M3 CPU. The Due Arduino AT91SAM3X8E ARM Cortex-M3 Board is the first Arduino board based on a 32-bit ARM core microcontroller. It has 54 digital input/output pins (of which 12 can be used as PWM outputs), 12 analog inputs, 4 UARTs (hardware serial ports), an 84 MHz clock, an USB OTG capable connection, 2 DAC (digital to analog), 2 TWI, a power jack, an SPI header, a JTAG header, a reset button and an erase button. Key

5V 16MHz Pro Mini ATMEGA328P Looking to dive into the exciting world of DIY electronics and automation? Our Arduino Pro Mini 5V/16MHz/ATMEGA328P Compatible board is here to be your perfect companion. Designed to be compact and powerful, this microcontroller board opens up a world of possibilities for your creative projects.The Arduino Pro Mini comes equipped with 14 digital input/output pins, allowing you to connect various sensors, actuators, and peripherals effortlessly. What's more, 6 of these pins can be used as PWM outputs, granting you precise control over motors and LEDs. With 8 analog input pins, you can capture real-world data and create interactive projects like never before.Running on a 16MHz bootloader, this board ensures speedy and efficient operation, handling complex tasks with ease. Whether you're a seasoned maker or a budding enthusiast, this microcontroller will elevate your projects to new heights.Compact and lightweight, the Arduino Pro Mini is perfect for integrating into your projects without adding bulk. Ideal for semi-permanent installations, exhibitions, and innovative prototypes, it offers the freedom to create without limitations. Join Our Global Community Be a part of the growing global community of makers and innovators who have chosen Iotcart as their go-to destination for DIY electronics. With our vast selection of compatible boards, sensors, and accessories, you'll find everything you need to bring your ideas to life. Best Price, Free Shipping, and COD At Iotcart, we understand the value of your time and money. That's why we offer the best price guarantee, ensuring you get the most value for your investment. Plus, enjoy the convenience of free shipping on orders above Rs 500/- and Cash on Delivery (COD) option for hassle-free payment. Secure, Swift, and Supportive Our dedicated technical support team is always at your service to assist you in your DIY journey. We take pride in delivering genuine products worldwide with the utmost care and security, ensuring you have a smooth and delightful shopping experience. Note: Pro Mini ATMEGA328P come without connectors. We recommend the first time Arduino users start with the Uno R3. There is two versions of the Pro Mini. One runs at 3.3V and 8 MHz, the other at 5V and 16 MHz. To buy 3.3V/8MHz Pro Mini click on the name below: Pro Mini ATMEGA328P 3.3V/8MHz with Connector 5V 16MHz Pro Mini ATMEGA328P without connectors Package Includes: 1 x 5V Pro Mini Board compatible with Arduino 5V Pro Mini Arduino board Specifications: Microcontroller  ATmega328 Circuit Operating Voltage 5V Clock frequency 16MHz Digital I/O Pins 14 PWM Pins 6 Interface UART :1, SPI :1, I2C :1 Analog Input Pins 8 Dimensions  3.3 x 1.8 x 1cms Weight 5 grams

D1(ESP-12E) WiFi Development Board This is ESP8266 D1 R1 V2.1.0 WiFi Development Board. The D1 is an ESP8266 WiFi based board that uses the Arduino layout with an operating voltage of 3.3V. The board is controlled by the ESP8266 chip (a 32-Bit processor) and has a larger flash memory compared to an Arduino Uno. It consists of 11 digital I/O pins and 1 analog (input) pin. the board can be connected using a Micro-B type USB cable. The D1 R1 is a WiFi capable ESP8266EX based development board in the form of the Arduino UNO board format. This board is compatible with the Arduino IDE and with NodeMCU. The D1 R1 also features an onboard switching power supply which allows you to power the board from a power supply up to 12V. Package Includes: 1 x D1(ESP-12E) WiFi Development Board Specifications: Microcontroller ESP8266EX Board Type  Wifi Development Board  Operating Voltage 3.3V Digital I/O Pins 11 (all I/O pins have interrupt/PWM/I2C/one-wire capability, except for D0) Analog Input Pins 1 Flash Memory 4Mb Input Voltage Range 9V to 12V Output Voltage  5V at 1A Max Dimensions  5 x 4 x 3cms Weight  25 grams

Arduino UNO R3 SMD Board Compatible with Arduino The SMD Arduino UNO R3 Development Board with Cable is your gateway to a world of electronic innovation. Measuring 7 x 5 x 1cms, it's a compact and reliable choice for both beginners and experienced electronics enthusiasts. This board guarantees the highest quality and durability, and it's readily available for purchase. Equipped with the versatile ATmega328 microcontroller, 14 digital input/output pins, 6 analog inputs, 16MHz crystal oscillator, a USB connection, and the CH340G USB to UART Converter Chip, this development board is a perfect match for Arduino-based electronic projects. Whether you're a newbie looking to dive into the exciting world of electronics or an experienced maker seeking a reliable tool for prototyping and skill development, the SMD Arduino UNO R3 has you covered. It's your essential companion for robotics, IoT, home automation, and security system projects. But the possibilities don't stop there; think music instruments, robot cars, and fingerprint door locks. Whether your project ideas are big or small, this board unlocks a world of creative potential. Purchase this board today to experience top-tier quality and performance. If you want to use this UNO SMD Board compatible with Arduino in your small or DIY projects, for that you will need few essential components like Breadboards Jumper wires batteries or power supply BO motors Motor drivers Sensors Comparison of Uno Boards: Specification UNO Wifi UNO SMD UNO R3 Microcontroller ATmega4809 ATmega328P (SMD) ATmega328P (Through hole) USB connector Micro-USB USB-B USB-B Digital I/O Pins 14 14 14 Analog input pins 6 6 6 PWM pins 5 6 6 UART Yes Yes Yes I2C Yes Yes Yes SPI Yes Yes Yes I/O Voltage 5V 5V 5V Input voltage (nominal) 7-12V 7-12V 7-12V DC Current per I/O Pin 20mA 20 mA 20 mA Power Supply Connector Barrel Plug Barrel Plug Barrel Plug clock speed 16 MHz 16 MHz 16 MHz USB-Serial chip ATmega16U2 CH340 ATmega16U2 SRAM 6.144KB 2KB 2KB Flash Memory 48KB 32KB 32KB EEPROM 256 Bytes 1KB 1KB Dimensions 68.6 mm x 53.4 mm 68.6 mm x 53.4 mm 68.6 mm x 53.4 mm RADIO MODULE u-blox NINA-W102 - - Inertial Measurement Unit LSM6DS3TR (3D accelerometer) - - LED_BUILTIN 25 13 13 Wi-Fi Microprocessor Yes - - Applications: Arduino Music Instrument Robot Car Fingerprint door lock Home Automation Security systems What is an UNO R3 (Arduino Compatible) Board? Package Includes: 1 x UNO SMD Board compatible with Arduino Specifications:  Microcontroller  ATmega328 Digital I/O Pins 14 Analog Inputs  6 Crystal Oscillator Frequency  16MHz Operating Voltage  6-20V Dimensions  7 x 5 x 1cms Weight  10 grams

Pro Mini ATMEGA328P Are you a passionate DIY enthusiast or an aspiring inventor? Look no further! The Arduino Pro Mini 3.3V/8MHz ATMEGA328P Board is your gateway to endless possibilities. This compact and powerful microcontroller board is designed to bring your creative ideas to life. The Arduino Pro Mini features an ATmega328 microcontroller that provides 14 digital input/output pins, 6 PWM ports, and 6 analog inputs. Its 8MHz bootloader ensures smooth and efficient operation. Measuring just 5 x 3 x 2cms, this board is perfect for projects where space is limited. Its small size makes it ideal for embedding into objects or exhibitions seamlessly.Are you looking for a board that offers exceptional performance and connectivity options? The Arduino Pro Mini 3.3V/8MHz ATMEGA328P Board has got you covered!*With a 3.3V circuit operating voltage and an 8MHz clock frequency, this board ensures stable and efficient performance for your projects.The Pro Mini comes equipped with 6 PWM ports (D3, D5, D6, D9, D10, and D11) that allow you to control motors, servos, and other devices precisely.The onboard resonator and reset button make it easy to connect and program the board without any hassle. The Arduino Pro Mini 3.3V/8MHz ATMEGA328P Board is not just a microcontroller; it's a gateway to a world of possibilities. From robotics and automation to IoT projects and sensor applications, this board is suitable for a wide range of projects.Pair this board with our 5-in-1 Sensor Kit for Arduino, and you'll have access to an array of sensors to take your projects to the next level. Join Our Global Community Be a part of the growing global community of makers and innovators who have chosen Iotcart as their go-to destination for DIY electronics. With our vast selection of compatible boards, sensors, and accessories, you'll find everything you need to bring your ideas to life. Best Price, Free Shipping, and COD At Iotcart, we understand the value of your time and money. That's why we offer the best price guarantee, ensuring you get the most value for your investment. Plus, enjoy the convenience of free shipping on orders above Rs 500/- and Cash on Delivery (COD) option for hassle-free payment. Secure, Swift, and Supportive Our dedicated technical support team is always at your service to assist you in your DIY journey. We take pride in delivering genuine products worldwide with the utmost care and security, ensuring you have a smooth and delightful shopping experience.

Arduino MEGA 2560 Atmel R3 Board compatible with Arduino The Arduino Mega 2560 R3 is an open-source precise microcontroller board Successor to the Arduino Mega based on the ATmega2560 SMD chip. The Mega 2560 R3 also adds SDA and SCL pins next to the AREF. In addition, there are two new pins placed near the RESET pin. One is the IOREF that allows the shields to adapt to the voltage provided from the board. The other is not connected and is reserved for future purposes. The Mega 2560 R3 works with all existing shields but can adapt to new shields which use these additional pins. This Board has 54 digital input/output pins (of which 15 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller. Using the board is also very easy, simply connect it to a computer with a USB cable or power it with a DC adapter or battery to get started. The Mega 2560 R3 board is compatible with most shields designed for Arduino/Genuino Uno and the former boards Duemilanove or Diecimila. Also check Arduino MEGA Prototype Shield V3. It has a prototyping area with holes and pads for components. It also has power rails and other features like a reset button and LEDs. Using the shield can save time and simplify the process of prototyping circuits. Key

Arduino Mega 2560+WiFi R3 ATmega2560+Node MCU ESP8266 CH340G Board Compatible with Arduino Mega +WiFi R3 Atmega2560+NodeMCU ESP8266 is a customized version of the Arduino Mega R3 board with full integration of Atmel ATmega2560 microcontroller and ESP8266 Wi-Fi IC, with 32 Mb (megabits) of flash memory, and CH340G USB-TTL converter on a single board! All components can be set up to work together or independently. Mega +WiFi R3 Atmega2560+NodeMCU ESP8266 32Mb Memory USB-TTL CH340G Compatible with Arduino Mega is Full integration on one board Mega R3 ATmega2560 and WiFi ESP8266 with memory 32Mb. All of the modules can work together or separately. And everyone has their pinout headers. The convenient solution for the development of new projects requiring Uno and WiFi. Via USB you can update sketches and firmware for ATmega328 and ESP8266. Switch status and model selection: Connection/Switch No. 1 2 3 4 5 6 7 8 CH340 connect to ESP8266 (upload sketch) OFF OFF OFF OFF ON ON ON NoUSE CH340 connect to ESP8266 (connect) OFF OFF OFF OFF ON ON OFF NoUSE CH340 connect to ATmega2560 (upload sketch) OFF OFF ON ON OFF OFF OFF NoUSE CH340 connect to Mega2560 COM3 connect to ESP8266 ON ON ON ON OFF OFF OFF NoUSE Mega2560+ESP8266 ON ON OFF OFF OFF OFF OFF NoUSE All modules work independently OFF OFF OFF OFF OFF OFF OFF NoUSE Also, have the switch to change of connecting port between ATmega2560 and ESP8266After choosing the mode of the board can proceed to set up the IDEIt is important that when the ESP8266 module is programming, it is necessary to press the button Mode Applications: IoT smart applications Wi-Fi-based applications Robotics applications Can be used to enable internet connectivity to embedded applications Package Includes 1 x Mega 2560+Wifi+Node MCU Development Board Specifications: Compatibility  Compatible with Arduino Development Board Type  Customized version of Arduino Mega R3 Length (mm) 106 Width (mm) 54 Height (mm) 12 Weight (grams) 40

Leonardo R3 board compatible with Arduino The Leonardo R3 Board Micro-USB Arduino Compatible is a microcontroller board based on the ATmega32u4. It has 20 digital input/output pins (seven PWM outputs and twelve analogue inputs), a 16 MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, and a reset button. The Leonardo R3 board includes everything needed to support the microcontroller; simply connect it to a computer via USB or power it via an AC-to-DC adapter or battery to get started. The Leonardo R3 Board differs from all previous boards in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Leonardo to appear to a connected computer as a mouse and keyboard; in addition to a virtual (CDC) serial / COM port. It also has other ramifications for the board's behavior. Arduino Leonardo Pinout   Also check Keyes MOS Driving Module. It is a breakout board for the IRF520 MOSFET transistor. It is designed to allow you to control high-power DC loads from a microcontroller. You can use it to control things like LEDs, DC motors, and solenoid valves. Package Includes : 1 x Leonardo R3 Board Specifications: Microcontroller  ATmega32u4 Board Mode Leonardo R3 Operating Voltage 5V Input Voltage (Recommended) 7-12V Digital I/O Pins 20 PWM Channels 7 Analog Input Channels 12 Dimensions  5 x 4 x 1cms Weight  10 grams Clock Speed 16 MHz Flash Memory 32 KB (ATmega32u4) of which 4 KB used by bootloader

Mega 2560 Pro CH340G ATmega2560 Board The Mega Pro Embed CH340G / ATmega2560 board is based on the ATmega2560 microcontroller and the USB-UART adapter CH340. The board is compatible with Arduino Mega 2560. The Mega 2560 is an excellent solution for building exciting projects based on ATmega2560.  The Mega Pro Embed functionalities are identical to the Arduino Mega 2560. Even though it is an Embed board, it is solid and stable as the Mega Board. It uses the original chip, and a 16 MHz high-quality quartz resonator is present on the board. atmega2560 board has a Micro USB connector that allows you to connect the microcontroller to the computer via the USB-UART adapter CH340 and may require an installation driver.  You can power the Mega 2560 Pro or power the pins through the MicroUSB connector. The voltage regulator (LDO) can handle input voltages from 6V to 9V (peak 18V) DC. The voltage regulator allows to use up to 18V as an input value, however, we do not recommend exceeding the recommended values aforementioned, since this can lead to excessive heat and damage the device. Key

Arduino Nano R3 Compatible Board with CH340 Chip Are you looking to buy the versatile Nano Board R3 with CH340 chip for your Arduino projects? Your search ends here! Nano Board R3 is a compact, feature-rich microcontroller development board that offers outstanding performance, suitable for all ages. This incredible board features 14 digital pins, opening up a world of possibilities for your robotics and DIY projects. It's designed to encourage skill development, making it perfect for students and enthusiasts of all age ranges. One of the standout features of Nano Board R3 is its advanced CH340 chip. This chip enhances the board's performance, making it an excellent fit for various electronics projects, including automation, control systems, and embedded computing. The Arduino Nano R3 Compatible Board with CH340 Chip is constructed with high-quality materials, ensuring its reliability even in challenging conditions. If you're a DIY enthusiast, this board is your best companion. It offers a wide range of applications, making it perfect for hobbyists and professionals alike. Note: Users needs to download CH341S64.SYS driver and use it with old bootloader settings in the arduino IDE. Key

LilyPad ATmega328P Board compatible with Arduino The LilyPad 328 ATmega328P Main Board 16M is a compatible Arduino-program micro-controller designed to be easily integrated into e-textiles and wearable projects. It offers the same functionality you find in other Arduino boards, in a lightweight, round package design to minimize snagging and profile. With wide tabs that can be sewn down and connect with conductive thread. The LilyPad consists of an ATmega328 compatible with the Arduino bootloader and a minimum number of external components to keep it as small (and as simple) as possible. This Lilypad board will run from 2V to 5V and offers large pin-out holes that make it easy to sew and connect. Each of these pins, with the exception of (+) and (-), can control an attached input or output device (like a light, motor, or switch). Each LilyPad was creatively designed to have large connecting pads to allow them to be sewn into clothing. Various input, output, power, and sensor boards are available. These boards are washable as well. Package Includes : 1 x LilyPad 328 ATmega328P Main Board 16M Specifications: Microcontroller ATmega328V Operating Voltage 2.7-5.5 V Input Voltage 2.7-5.5 V Digital I/O Pins 14 (of which 6 provide PWM output) Analog Input Pins 6 DC Current per I/O Pin 40 mA Flash Memory 16 KB  EEPROM 512 bytes Clock Speed 8 MHz Dimensions 5 x 4 x 1cms Weight  5 grams

Arduino MEGA 2560 CH340 R3 Compatible Board The Arduino MEGA 2560 R3 feature-packed development board is a dream come true for electronics enthusiasts and creators. It comes with top-notch quality and assurance. This Arduino mega microcontroller Board is a true powerhouse, equipped with 54 digital I/O pins and 16 analog input pins. It caters to all age groups and skill levels, encouraging skill development as you experiment and innovate. It's an ideal choice for a spectrum of applications, from robotics to automation and IoT projects. The AT Mega2560 Arduino R3 board is an Android Accessory Development Kit (ADK) that can be powered via a USB connection or with an external power supply. The power source is selected automatically. External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or a battery. The adapter can be connected by plugging a 2.1mm center-positive plug into the board’s power jack. The Mega R3 Android Accessory Development Kit (ADK) is a USB Host, the phone will attempt to draw power from it when it needs to charge. When the ADK is powered over USB, 500mA total is available for the phone and board. It's engineered to solve a wide range of user applications. This makes it a must-have for makers, students, and professionals alike. If you're someone who values quality and versatility in your electronics projects, the Arduino MEGA 2560 R3 Board is an indispensable tool. New Features of the Mega2560 R3 Board Features a 1.0 pinout with added SDA and SCL pins near the AREF pin. Features two new pins located near the RESET pin. It allow mega2560 shields to adapt to the voltage provided by the board. The At Mega2560 development board also features a stronger RESET circuit. Leads from a battery can be inserted in the GND and Vin pin headers of the POWER connector. Applications: Building robotic projects. Creating automation systems for home or industrial use. Perfect for Internet of Things (IoT) applications. Capable of gathering data from sensors and input devices. Excellent for prototyping electronic projects. A valuable tool for teaching electronics, programming, and engineering concepts. Controlling lights, appliances, and security devices. Package Includes: 1 x Arduino MEGA 2560 CH340 R3 Compatible Board MEGA2560 Board Specifications: Microcontroller ATmega2560 Operating Voltage 5V Input Voltage (recommended) 7-12V Input Voltage (limit) 6-20V Digital I/O Pins 54 (of which 15 provide PWM output) Analog Input Pins 16 DC Current per I/O Pin 20 mA DC Current for 3.3V Pin 50 mA Flash Memory 256 KB of which 8 KB used by bootloader SRAM 8 KB EEPROM 4 KB Clock Speed 16 MHz LED_BUILTIN 13 Dimensions 101.52 x 53.3 x 2 mm Weight 37 g

Pro Micro 5V 16M compatible with Arduino This Pro Micro 5V 16M Mini Leonardo Microcontroller Development Board For Arduino development board has 4 channel 10 bit ADC, 5 PWM pins, 12 DIO, and a hardware serial connection Rx and Tx you are familiar with Running on 16MHz and 5V, this board will remind you a lot of other Arduino compatible boards that you like. There is a voltage regulator on board, so it can accept up to 12V DC. The Micro is a microcontroller board based on the ATmega32U4. It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a micro USB cable to get started. It has a form factor that enables it to be easily placed on a breadboard. The Micro board is similar to the Arduino Leonardo in that the ATmega32U4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Micro to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port. If you supply an unstable power supply board, be sure to connect to the “RAW”, not on the VCC pin. It has also added a PTC fuse and diode protection to the power circuit and to correct the RX and LED TX circuits Package Includes: 1 x 5V Pro Micro Microcontroller compatible with Arduino 24 x unsoldered pins Specifications: Microcontroller  ATMEGA32U4 Digital I/O Pins  12 PWM Pins  5 ADC Pin  Four 10 Bit Hardware Serial Connection  Rx and Tx Dimensions  5 x 4 x 1 Weight  5 grams