Product Description

WIKI: http://wiki.keyestudio.com/index.php/Ks0001_keyestudio_UNO_R3_BOARD

Video: http://www.keyestudio.com/wp/2016/04/uno-r3-2/

Introduction

keyestudioUno is a microcontroller board based on the ATmega328P-PU. 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 worrying too much about doing something wrong, worst case scenario you can replace the chip for a few dollars and start over again.

Technical Specs

Microcontroller                                       ATmega328P-PU
Operating Voltage                                  5V
Input Voltage (recommended)                  7-12V
Input Voltage (limit)                                 6-20V
Digital I/O Pins                                      14 (of which 6 provide PWM output)
PWM Digital I/O Pins                               6
Analog Input Pins                                    6
DC Current per I/O Pin                            20 mA
DC Current for 3.3V Pin                          50 mA
Flash Memory                                        32 KB (ATmega328P)
of which 0.5 KB used by bootloader
SRAM                                                   2 KB (ATmega328P)
EEPROM                                               1 KB (ATmega328P)
Clock Speed                                           16 MHz
Length                                                   68.6 mm
Width                                                     53.4 mm
Weight                                                    25 g

Features

1.0 pinout: added SDA and SCL pins that are near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board. In future, shields will be compatible with both the board that uses the AVR, which operates with 5V and with the Arduino Due that operates with 3.3V. The second one is a not connected pin, that is reserved for future purposes.
Stronger RESET circuit.
Atmega 16U2 replace the 8U2.