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The ExtraCore is a 7/8th inch by 13/16th inch (24mm x 21mm) Arduino-compatible board by Dustin Andrews.
It has 14 digital input/output pins (6 of which are hardware PWM), 8 analog inputs (6 of which are GPIO), and a 16 MHz crystal oscillator.
It runs Optiboot (select "Arduino Uno" in the Boards menu), and has ".100 pitch headers for easy breadboard prototyping.
Its small size makes it well-suited to applications with stringent weight and space requirements, such as R/C planes, wearables, and spacecraft.
Specifications
- Roughly 1"x1"
- ATmega328
- Optiboot bootloader
- 14 I/O pins
- 6 PWM
- 6 Analog
- 16MHz
- 32kB Flash Memory
- 2kB RAM
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