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OSEPP UNO R4 Plus Microcontroller Board - Arduino Compatible

Regular Price: $27.99
Regular Price: $27.99
Regular Price: $27.99
Sold-out Online
Equivalent Part Numbers: 2760438   |  276-0438  |  276-438

The OSEPP UNO R4 Plus board is one of the most popular Arduino boards out in the market! This board uses the 8-bit, AVR, RISC-based ATmega328P microcontroller from Microchip (formally Atmel) and offers many improvements over the base Arduino Uno design.

  • Four additional 5V and GND power pins.
  • Two additional analog pins, A6 & A7.
  • Upgraded ATmega 16U2 chipset.
  • Powered by either USB or a DC power jack.
  • Built-in ICSP (in-circuit serial programming) header for programming the microcontroller.
  • Compatible with all Arduino software and hardware made for the Arduino Uno.

Catalog No. 2760438
Mfg. Part No. UNO-04
Microcontroller ATmega328P
Flash Memory 32KB
Operating Voltage 5V
Input Voltage 6 to 12V
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 I²C Connector
Dimensions 2.95 × 2.13 × 0.61"
(75 × 54 × 15.5mm)
UPC 667510001431


Note: This board is based off of the Arduino Uno designed by, and is released under the Creative Commons Attribution Share-Alike License. The original design can be found at

Technical Schematic (PDF)

⚠️ WARNING: CHOKING HAZARD: Small parts. Not for children under 3 yrs.