The Carduino Uno is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.
Compared with the Arduino UNO there is no major changes in hardware, the biggest difference between them is the master chip ATmega328P-AU, greatly reduced the weight of the controller, and many seem lightweight. Carduino UNO R3 is used in a ATMega8U2 microcontroller, borrowed from abroad with single chip analog serial approach, more stable and faster download speeds, which costs also increased because ATMega8U2 microcontroller difficult to find in the market. 


  • Microcontroller core:AVRmega328P-AU MCU
  • Operating voltage:DC +5 V (USB interface can be powered) 
  • External Input voltage:DC +7 V ~ +12 V (recommended) 
  • External input voltage (extreme):DC +6 V ≤ Vin ≤ +20 V 
  • Output voltage:DC +5 V / +3.3 V 
  • Digital signal I / O interfaces:14 
  • Analog inputs:6 
  • I / O Interface Current: 40mA 
  • Flash Capacity: 32KB (which 2K for the bootloader) 
  • SRAM static storage capacity:1KB 
  • EEPROM Storage capacity:512bytes 
  • Clock frequency:16MHz 
  • Size:53mm * 68mm


  • Two ways about the power supply,not only powered with the USB interface but also can use externally powered.
  • Arduino ISP support online programming,it can change the new "bootloader" firmware burned into the ATmega168 or ATmega328.And then via USB updating program. 
  • Based on Eagel format PCB and schematics SCH on Arduino official,simplify Arduino module, independently complete the microprocessor control,can be simply connected with sensors and various electronic components(EX: infrared, ultrasonic, thermal, light dependent resistor, servo steering ... etc.).
  • Supports a variety of interactive programs, such as: Flash, Max / Msp, VVVV, PD, C, Processing and so on.

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