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Elektor Uno R4

The successor to the popular Arduino Uno R3 has the new ATmega328PB micro with extra I/O for even more versatility!

UPDATE 2018-08:

This sold-out product can be ordered from GroupGets through a group campaign

Price $34.00

Member price $31.00

Out of stock


UPDATE 2018-08: This sold-out product can be ordered from GroupGets through a group campaign

Before launching a new batch of this sold-out board, we wish to poll your interest

When a manufacturer releases a B version of an existing product the differences between the old and the new are usually small. Not so in the case of Atmel’s ATmega328P, the processor at the heart of the Arduino Uno R3. The B-type of this MCU has so many extra features that a new revision of the R3 is justified: Elektor Uno R4.

The most striking difference between the Elektor Uno R4 and the Arduino Uno R3 are the four extra pins on the “power” connector and its second USART. Yes, you read that right: the Elektor Uno R4 has two USARTs making debugging and program development so much easier! Furthermore the Elektor Uno R4 has a 4-bit port E, a second I²C port, a second SPI port (four SPI ports if you count the USARTs), two additional analogue inputs, an output for the Analogue Comparator, nine PWM channels, two extra 16-bit timers, an Output Compare Modulator (OCM) and thanks to its Peripheral Touch Controller (PTC) every I/O pin can now be used as touch-sensitive pin without the addition of external components. Finally, a unique ID lets you identify the board uniquely (duh).

A Boards Package (for Windows) with a new compiler and improved libraries allows for a seamless integration of the Elektor Uno R4 in the current Arduino IDE.

If you would like further information about the product, please read our article.

• ATmega328PB @ 16 MHz
• 2x UART
• 2x I²C
• 2x SPI
• 9 PWM outputs
• 8 analog inputs
• 24 GPIO pins
• On-board 5 V and 3.3 V voltage regulators
• Arduino compatible Boards package
• Open source, open hardware design

  Arduino Uno R3 Elektor Uno R4
Microcontroller ATmega328P ATmega328PB
Operating Voltage 5 V 5 V or 3.3 V
MCU Power Disconnectable no yes
Input Voltage (recommended) 7-12 V 7-12 V
Input Voltage (limit) 6-20 V 6-20 V
Digital I/O Pins 14 18
PWM Digital I/O Pins 6 9
Analog Input Pins 6 8
Serial Ports (USART) 1 2
I²C 1 2
SPI (not USART) 1 2
Timers 3 5
Analog Comparator Output 1
Output Compare Modulator 1
Input Compare Channels 1 3
Unique ID 1
Peripheral Touch Controller 1
USB connector B Micro B
DC Current per I/O Pin 20 mA 20 mA
DC Current for 3.3 V Pin 50 mA 250 mA
Flash Memory 32 KB 32 KB
Flash Memory for Bootloader 0.5 KB 0.5 KB
Clock Speed 16 MHz 16 MHz
Length 68.6 mm 68.6 mm
Width 53.4 mm 53.4 mm

Read more on Elektor-Labs >>

SKU 17722
Manufacturer Elektor Labs
Editorial Number 150790-91
Microcontroller ATmega328PB


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Customer Reviews

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  1. Well, this one i am interested in. Three stars for the idea, identical form factor to the R3: +1

    (Posted on 4/28/2016) - Review by Tesla Sr.

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