The Adafruit Gemma is a tiny wearable platform board with a lot of might in a 1″ diameter package. Powered by an Attiny85, this board is perfect for any small wearable project. The board features 3 digital I/O pins of which, 2 can be used as PWM and one as an Analog input. To simplify wiring, an on/off switch has also been added.
The GEMMA can be programmed over USB using a USB micro cable and the Arduino IDE, but it's not a fully 100% Arduino-compatible. The GEMMA does not have a Serial port connection for debugging so the serial port monitor will not be able to send/receive data. There are some things you trade off for such a small and low cost microcontroller!
Please Note: Some computers' USB v3 ports don't recognize the GEMMAs bootloader. Simply use a USB v2 port or a USB hub in between
28mm diameter and 7mm thick.
ATtiny85 on-board, 8K of flash, 512 byte of SRAM, 512 bytes of EEPROM
Ultra low power, draws only 9 mA while running
3 GPIO – The 3 independent IO pins have 1 analog input and 2 PWM output as well.
Easy-to-sew or solder pads for embedding in your wearable project
Internal oscillator runs at 8MHz
Programmable with the Arduino IDE
Hardware I2C capability for breakout & sensor interfacing.
BC Robotics Inc. is a supplier and manufacturer of electronic kits, components, and accessories based in Nanaimo BC, Canada. We stock a large selection of popular items from Arduino, BBC micro:bit, Raspberry Pi, Adafruit Industries, SparkFun Electronics, Pololu, Makey Makey, and many more!