Adafruit Trinket 3V - Mini Microcontroller

Product ID: 111
Adafruit trinket 3v mini microcontroller
  • Adafruit trinket 3v mini microcontroller
  • Trinket 3v microcontroller attiny
  • Adafruit trinket 3v microcontroller
  • Adafruit trinket 3v

Ships in 7 to 10 working days

Are you looking for a microcontroller for your project and just need a few IO pins? Adafruit's Trinket Mini Microcontroller is the board for you. This tiny little board runs powerful ATTiny85 micro controller and has 8K of flash and 5 IO Pins. Just connect it to a computer via USB and use it as a mini Arduino 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 Adafruit's lowest-cost arduino-IDE programmable board!

The Adafruit Trinket comes in 2 variations, 5V and 3V logic. Both work the same, but have different operating logic voltages. Use the 3V one to interface with sensors and devices that need 3V logic, or when you want to power it off of a LiPo battery. The 3V version should only run at 8 MHz.

Use 5V Trinket for sensors and components that can use or require 5V logic. The 5V version can run at 8 MHz or at 16MHz by setting the software-set clock frequency.

Even though you can program Trinket using the Arduino IDE, it's not a fully 100% Arduino-compatible. There are some things you trade off for such a small and low cost microcontroller!

  • Trinket does not have a Serial port connection for debugging so the serial port monitor will not be able to send/receive data.
  • Some computers' USB v3 ports don't recognize the Trinket's bootloader. Simply use a USB v2 port or a USB hub in between.

For more detailed information about the Trinket, checkout the Introducing Adafruit trinket tutorial.


MicrocontrollerAtmel ATtiny85
Operating Voltage3.3V DC
Input Voltage (Limits)3 to 16V DC
Digital I/O Pins4 (of which 2 provide PWM output)
Analog Input Pins1
Flash Memory8 KB (2.75 KB used by boot loader)
EEPROM512 Bytes
SRAM512 Bytes
Clock Speed8 MHz
USBMini USB for power or USB uploading
Power SupplyUSB or external output (battery or power supply) - automatic switching
Dimensions31 x 15.5 x 5 mm
Weight1.85 g