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Catalogue : Arduino, Pi, Microcontrollers, 3D Printing and Kits : Arduino, Raspberry Pi and Microcontrollers : Arduino Boards : OSEPP™ Arduino

OSEPP™ Uno R4 Plus


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The OSEPP Uno R4 Plus board uses the 8-bit, AVR, RISC-based ATmega328P microcontroller from Atmel.

New and improved features in R4:
• ATMEGA 16U2 Chipset
• Micro USB connector
• 4 additional 5v and GND power pins
• Additional analog pins A6 & A7
• Replaced mini-USB connector with the more popular micro-USB connector
• Removed the Molex connector

This board is based on the Arduino Uno designed by Arduino, and is released under the Creative Commons Attribution Share-Alike License.

The original design can be found at:


  • Microcontroller: ATmega328P
  • Clock Speed: 16 MHz
  • Flash Memory: 32 KB
  • SRAM: 2 KB
  • EEPROM: 1 KB
  • Operating Voltage: 5V
  • Input Voltage: 6-12 V
  • Digital I/O Pin Count: 14 (including 6 for PWM output)
  • Analog Input Pin Count: 8
  • Other Connections: micro-USB, ICSP for ATmega328p, DC power connector, 4-pin latchable I2C connector
  • Dimensions: 2.95 x 2.13 x 0.61 inches (75.0 x 54.0 x 15.5 mm)
  • Power Source: USB or external DC power supply