ADAFRUIT GEMMA V2 Wearable Development Board 1222

Product overview and Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
Product Details

Adafruit GEMMA Wearable Platform v2

GEMMA is a tiny wearable platform built on a round 1.1 inch (2.8 cm) diameter board. The microcontroller at the heart of GEMMA is the Atmel Attiny85 8-bit MCU and is programmable with an Arduino IDE over USB.

This, the second generation of GEMMA, is physically and code-wise identical to the original but now has a Micro-B USB connector and an On-Off switch. It was designed mainly for wearable applications but its small size and low cost makes it great for a wide range of portable projects.

The Attiny85 processor has 8K of flash and 5 I/O pins, including analogue inputs and PWM outputs. There is a USB bootloader available from Adafruit.com but although you can program GEMMA using the Arduino IDE, it is not fully 100% Arduino compatible.

- Super small, only 1.1" / 28 mm diameter and 0.28" / 7mm thick.
- Easy-to-sew or solder pads for embedding in your wearable project
- ATtiny85 on-board, 8K of flash with around 5.25K bytes available for use (2.75K taken for the bootloader)
- 512 bytes of SRAM, 512 bytes of EEPROM
- Internal oscillator runs at 8 MHz
- Ultra low power, draws only 9 mA while running
- Micro-USB jack for power and/or USB uploading
- On-board 3.3 V power regulator with 150 mA output capability and ultra-low dropout. Up to 16 V input, reverse-polarity protection, thermal and current-limit protection.
- On-board green power LED and red pin #1 LED
- Reset button for entering the bootloader or restarting the program.
- 3 GPIO - The 3 independent I/O pins have 1 analogue input and 2 PWM output as well.
- Hardware I²C capability for breakout & sensor interfacing.

Adafruit GEMMA Wearable Platform

Specifications
Attribute Value
Classification Development Board
Kit Name GEMMA V2
Technology Wearable
Processor Part Number ATtiny85
Processor Type MCU
43 In stock for delivery within 3 working days
Price Each
HK$ 72.08
(exc. GST)
units
Per unit
1 - 4
HK$72.08
5 - 9
HK$69.92
10 +
HK$68.52
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