It's our lowest-cost arduino-IDE programmable board! Perfect for when you don't want to give up your expensive dev-board and you aren't willing to take apart the project you worked so hard to design. It's a microcontroller board that is small enough to fit into any project, and low cost enough to use without hesitation. Hardware I2C / SPI capability for breakout & sensor interfacing.Trinket may be small, but do not be fooled by its size! It's a tiny microcontroller board, built around the Atmel ATtiny85, a little chip with a lot of power.The 2 shared IO pins have 2 more analog inputs and one more PWM output. The 3 independent IO pins have 1 analog input and 2 PWM output as well. 5 GPIO - 2 shared with the USB interface.

No need to unplug/replug the board every time you want to reset or update!

Reset button for entering theВ boot-loaderВ or restarting the program.

On-board green power LED and red pin #1 LED.

Power with either USB or external output (such as a battery) - it'll automatically switch over.

Up to 16V input, reverse-polarity protection, thermal and current-limit protection.

On-board 3.3V or 5V power regulator with 150mA output capability and ultra-low dropout.

~5.25K bytes available for use (2.75K taken for the boot-loader).

Adafruit really worked hard on the boot-loader process to make it rugged and foolproof, this board wont up and die on you in the middle of a project!.

Mini-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.

USBВ boot-loaderВ with a nice LED indicator looks just like a USBtinyISP so you can program it with AVRdude(with a simple config modification) and/or the Arduino IDE (with a few simple config modifications).

ATtiny85 on-board, 8K of flash, 512 byte of SRAM, 512 bytes of EEPROM.

You can't stack a big shield on it but for many small & simple projects the Trinket will be your go-to platform. In fact they even made some simple modifications to the Arduino IDE so that it works like a mini-Arduino board. Adafruit designed a USBВ boot-loaderВ so you can plug it into any computer and reprogram it over a USB port just like an Arduino. 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. It's their lowest-cost arduino-IDE programmable board! As of October 9th, 2015 the 5V Trinket comes with a micro-USB connector instead of a mini-USB connector!ДЄdafruit wanted to design aВ micro-controllerВ board that was small enough to fit into any project, and low cost enough to use without hesitation. The 5V version can run at 8 MHz or at 16MHz by setting the software-set clock frequency.

Use the 5V one for sensors and components that can use or require 5V logic.

As of May 27th, 2015 the 3.3V Trinket has been revised!В The board is now even smaller - at just 27mm x 15mm - and comes with a micro-B USB connector rather than mini-B The 3V3 version should only run at 8 MHz.

Use the 3V3 one to interface with sensors and devices that need 3V3 logic, when you want to power it off of a LiPo battery, or if you want to connect it directly to the Raspberry Pi GPIO without logic level converters.

Both work the same, but have different operating logic voltages. Trinket may be small, but do not be fooled by its size! It's a tinyВ micro-controllerВ board, built around the Atmel ATtiny85, a little chip with a lot of power.

Adafruit trinket i2c