1222

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