WIKI: http://wiki.keyestudio.com/index.php/Ks0099_keyestudio_EASY_plug_Control_Board

Introduction

Keyestudio Easy-plug control board is a microcontroller board based on the ATmega328P-PU. It has 14 digital input/outputs (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 worrying too much about doing something wrong, worst case scenario you can replace the chip for a few dollars and start over again.

For convenience of wire connection, we simplify pins GND and VCC into each plug, so you only need one wire to connect a module, no need to separately connect the VCC and GND. The pins on the original UNO are all redesigned into plug interface. On the board, you can find ports D2-D13, A0 to A5, an IIC port and a COM port. All in one simple plug.

Specification

Microcontroller core: ATmega328P-PU
Working voltage: +5V
External input voltage?+7V~+12V?suggest?
External input voltage ( extremum ): +6V? Vin ? ?20V
Digital signal I/O interface: 14 (of which 6 provide PWM output)
Analog signal input interface: 6
DCI/O interface current: 20mA
FlashMemory: 32KB (ATmega328) of which 0.5 KB used by bootloader
SRAM static storage capacity:2KB
EEPROM storage capacity: 1KB
Clock frequency?16MHZ