Description
GEMMA is a tiny wearable platform board with a lot of might. Powered by a Attiny85 and programmable with an Arduino IDE over USB, you'll be able to realize any wearable project!
The Attiny85 is a fun processor because despite being so small, it has 8K of flash, and 5 I/O pins, including analog inputs and PWM 'analog' outputs. Adafruits designed a USB bootloader so you can plug it into any computer and reprogram it over a USB port just like an Arduino (it uses 2 of the 5 I/O pins, leaving you with 3). In fact Adafruit even made some simple modifications to the Arduino IDE so that it works like a mini-Flora. Perfect for small & simple projects the GEMMA will be your go-to wearable electronics platform.
- GEMMA does not have a Serial port connection for debugging
- super small, only 1.1'' / 28 mm diameter and 0.28'' / 7 mm thick
- easy-to-sew or solder pads for embedding in your wearable project
- ATtiny85 on-board
- 8 kB of flash
- 512 byte of SRAM
- 512 bytes of EEPROM
- Internal oscillator runs at 8MHz
- Ultra low power, draws only 9 mA while running
- USB bootloader with a LED indicator
- Micro-USB jack for power and / or USB uploading
- 5.25 kB available for use (2.75 kB taken for the bootloader)
- 3.3 V power regulator with 150 mA output capability and ultra-low dropout
- Power with either USB or external output (such as a battery)
- green power LED and red pin #1 LED
- Reset button for entering the bootloader or restarting the program
- 3x GPIO
- I2C capability
- Dimensions: 28 mm x 7 mm
