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Development Board, ATtiny85 MCU, 8BIT Attiny, Programmable Arduino IDE Over USB, Wearable Board


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1222   Datasheet
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Dev Board ATtiny85 MCU


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Technical Documents (1)

Product Overview

The 1222 is an Adafruit GEMMA v2 Miniature wearable electronic platform board. This compact design consists of Arduino compatible microcontroller suitable for wearable projects. The Attiny85 is a fun processor because despite being so small, it has 8K of flash and 5 I/O pins including analogue inputs and PWM analogue outputs. The board is designed with a USB bootloader so that user can plug it into any computer and reprogram it through USB port. GEMMA board is programmed with Arduino IDE but it is not 100% Arduino compatible. This board do not have serial port connection for debugging, hence the serial port monitor will not be able to send/receive data. Some computers with USB v3 ports don't recognize the GEMMA's bootloader, simply use USB v2 port or a USB hub in between. GEMMA board is powered upto 16V and featured with internal 3.3V low dropout regulator with 150mA to provide best output capability.
  • Super small 1.1"/28mm diameter and 0.28"/7mm thick
  • ATtiny85 onboard, 8K of flash, 512 bytes of SRAM, 512 bytes of EEPROM
  • 8MHz internal oscillator
  • Ultra low power and draws only 9mA while running
  • USB bootloader with a LED indicator
  • Powered with mini USB jack
  • Power with either USB or external output
  • Reset button for entering to bootloader or restarting the program
  • Three GPIO pins have 1 analogue input and 2 PWM outputs
  • Hardware I2C capability for breakout & sensor interfacing


Embedded Design & Development, Hobby & Education

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