KJ314 UNO R3 ATMEGA328P CH340 CH340G UNO R3 with USB Cable for Uno
UNO R3 is a microcontroller board based on the ATmega328P .It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, 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.. You can tinker with your UNO without worring too much about doing something wrong, worst case scenario you can replace the chip for a few dollars and start over again.
Digital I/O Digital input/output terminal, a total of 0 ~ 13.
Analog I/O Analog input/output terminal, a total of 0 ~ 5.
Support the ISP download function.
The input voltage: when connected to the computer USB without external power supply, external power supply 5 v ~ 9 v dc voltage input.
Output voltage: 5 V dc voltage output and 3.3 V dc voltage output.