Adafruit Trinket - 3V3
The Adafruit Trinket 3V3 is a tiny microcontroller board built around the Atmel ATtiny85 processor. At just 27mm × 15mm, it's small enough to fit into virtually any project and affordable enough to dedicate to a single build. Program it via the Arduino IDE over the Micro-USB connector — no separate programmer required.
This is the 3.3V version, designed for interfacing with 3.3V sensors and components or powering from a LiPo battery. The 3V Trinket runs at 8 MHz. For 5V logic or 16 MHz operation, choose the 5V version instead.
Key Features
- ATtiny85 Processor – 8K flash (~5.25K usable), 512 bytes SRAM, 512 bytes EEPROM
- 5 GPIO Pins – 3 independent I/O (1 analog input, 2 PWM outputs) plus 2 shared with USB (2 more analog inputs, 1 more PWM output)
- Arduino IDE Compatible – USB bootloader allows programming directly from the Arduino IDE or AVRdude
- Micro-USB Connector – For programming and power
- Onboard 3.3V Regulator – 150mA output with up to 16V input, reverse-polarity protection, thermal and current-limit protection
- Automatic Power Switching – Powers from USB or external source (battery), switches automatically
- Hardware I2C / SPI – For connecting breakouts and sensors
- 8 MHz Internal Oscillator – Can be doubled to 16 MHz in software
- Onboard LEDs – Green power LED and red LED on pin #1
- Reset Button – Enter bootloader or restart without unplugging
- Mounting Holes – For secure installation
Ideal For
- Small, embedded projects with minimal I/O requirements
- Wearable electronics and compact builds
- Battery-powered projects using 3.3V logic
- Dedicated microcontroller for single-purpose projects
Package Contents
- 1× Adafruit Trinket 3V3 Microcontroller Board
Resources
Original: $14.16
-70%$14.16
$4.25Product Information
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Description
The Adafruit Trinket 3V3 is a tiny microcontroller board built around the Atmel ATtiny85 processor. At just 27mm × 15mm, it's small enough to fit into virtually any project and affordable enough to dedicate to a single build. Program it via the Arduino IDE over the Micro-USB connector — no separate programmer required.
This is the 3.3V version, designed for interfacing with 3.3V sensors and components or powering from a LiPo battery. The 3V Trinket runs at 8 MHz. For 5V logic or 16 MHz operation, choose the 5V version instead.
Key Features
- ATtiny85 Processor – 8K flash (~5.25K usable), 512 bytes SRAM, 512 bytes EEPROM
- 5 GPIO Pins – 3 independent I/O (1 analog input, 2 PWM outputs) plus 2 shared with USB (2 more analog inputs, 1 more PWM output)
- Arduino IDE Compatible – USB bootloader allows programming directly from the Arduino IDE or AVRdude
- Micro-USB Connector – For programming and power
- Onboard 3.3V Regulator – 150mA output with up to 16V input, reverse-polarity protection, thermal and current-limit protection
- Automatic Power Switching – Powers from USB or external source (battery), switches automatically
- Hardware I2C / SPI – For connecting breakouts and sensors
- 8 MHz Internal Oscillator – Can be doubled to 16 MHz in software
- Onboard LEDs – Green power LED and red LED on pin #1
- Reset Button – Enter bootloader or restart without unplugging
- Mounting Holes – For secure installation
Ideal For
- Small, embedded projects with minimal I/O requirements
- Wearable electronics and compact builds
- Battery-powered projects using 3.3V logic
- Dedicated microcontroller for single-purpose projects
Package Contents
- 1× Adafruit Trinket 3V3 Microcontroller Board
