Adafruit Arduino GEMMA - Miniature wearable electronic platform

The Arduino GEMMA is a compact wearable platform that packs a punch in a 1-inch diameter. Engineered through collaboration between Arduino.cc and Adafruit, this microcontroller board excels in creating wearable electronic projects.

Powered by an ATtiny85 processor, the GEMMA features 8K of flash memory and five I/O pins, allowing for analog inputs and PWM outputs. Its small size does not compromise functionality, with a USB bootloader making programming seamless via any computer's USB port using the Arduino IDE.

The GEMMA measures just 1.1 inches in diameter and 0.28 inches thick, making it easy to sew or solder into projects. It operates on ultra-low power, drawing only 9 mA, and includes a green power LED and a red pin #1 LED. A built-in 3.3V power regulator supports up to 16V input and offers protection against reverse polarity, thermal issues, and current limits.

Although not fully Arduino UNO-compatible due to its compact form, the GEMMA provides ample features for small and simple projects, including three GPIO pins, with one analog input and two PWM outputs. It also has hardware I2C capabilities for sensor interfacing.

Perfect for embedding in wearables, the GEMMA’s design makes it a go-to for project creation without breaking the bank. Despite its size, it offers capabilities akin to a mini-Flora, ideal for everyday electronic endeavors.