1. For R3 is a development board based on the Atmega328P microcontroller.2. It has 14 digital input/output pins (6 of these pins can be used as PWM output pins), 6 analog input pins, 16MHz quartz crystal oscillator, USB interface, interface, and supports online serial programming and reset button.3. The user only needs to the development board with the computer through the USB interface to it.4. It is applicable for 's software and hardware platforms based on development source code. It is easy to learn and has strong scalability.5. The advantage of for is it is simple and convenient to program. If you are not familiar with the chip, you can write it for programming, of going through the SCM's data manual to configure registers. This is a great advantage. Moreover, the development board has a unified interface, and the program has strong portability. It is in resources and easy to . It is very suitable for beginners to learn.Product name: For R3 development boardMicrocontroller: Atmega328PWorking voltage: 5VInput voltage (recommended value): 7-9VDigital I/O pin: 14 (6 of which PWM output)Analog input pin: 6DC current of each I/O pin: 40mADC current of 3.3V pin: 50mAFlash Memory:32 KB ()SRAM: 2 KBEEPROM:1 KBClock speed: 16MHzLength: 68.6mmWidth: 53.4mmcolor:GreenMaterial:PCB+MetalPackage Contents:1 x For R3 development boardOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.