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Deprecation Warning: The Gemma bit-bang USB technique it uses doesn#39;t work as well as it did in 2014, many modern computers won#39;t work well. So while we still carry the Gemma so that people can maintain some older projects, we no longer recommend it. Please check out the Gemma M0.It has built-in USB, more capabilities, and is comparable in price!
Love FLORA but want a bite-sized version Look no further, GEMMA is a tiny wearable platform board with a lot of might in a 1 diameter package. Powered by a Attiny85 and programmable with an Arduino IDE over USB, you#39;ll be able to realize any wearable project!
We wanted to design a microcontroller board that was small enough to fit into any project, and low cost enough to use without hesitation. Perfect for when you don#39;t want to give up your Flora and you aren#39;t willing to take apart the project you worked so hard to design. It#39;s our lowest-cost sewable controller! 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 #39;analog#39; outputs. We 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 we even made some simple modifications to the Arduino IDE so that it works like a mini-Flora. Perfect for small amp; simple projects the GEMMA will be your go-to wearable electronics platform.
Even though you can program GEMMA using the Arduino IDE, it#39;s not a fully 100% Arduino-compatible. There are some things you trade off for such a small and low cost microcontroller!
GEMMA does not have a Serial port connection for debugging so the serial port monitor will not be able to send/receive data
Some computers#39; USB v3 ports don#39;t recognize the GEMMAs bootloader. Simply use a USB v2 port or a USB hub in between
Here are some useful specifications!
Super small, only 1.1 / 28mm diameter and 0.28 / 7mm thick.
Easy-to-sew or solder pads for embedding in your wearable project
Low cost enough, you can use one for every weekend project
ATtiny85 on-board, 8K 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 nice LED indicator looks just like a USBtinyISP so you can program it with the Arduino IDE (with a few simple config modifications)
Micro-USB jack for power and/or USB uploading, you can put it in a box or tape it up and use any USB cable for when you want to reprogram.
We really worked hard on the bootloader process to make it rugged and foolproof
~5.25K bytes available for use (2.75K taken for the bootloader)
On-board 3.3V power regulator with 150mA output capability and ultra-low dropout. Up to 16V input, reverse-polarity protection, thermal and current-limit protection.
Power with either USB or external output (such as a battery) - it#39;ll automatically switch over
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 IO pins have 1 analog input and 2 PWM output as well.
Hardware I2C capability for breakout amp; sensor interfacing.
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Informazioni aziendali
ROBOT DOMESTICI SRL - Via Cornelio Labeone, 70 - 00174 Roma (RM)
Partita IVA IT15791431008 - REA di Roma n. RM 1614298
CODICE FATTURAZIONE ELETTRONICA: KRRH6B9
Tel. (+39) 06 76971136 | e-mail: info@robot-domestici.it