Adafruit Itsy Bitsy 32u4 - 3V 8MHz
We have ✅ 10 available of the AF-3675 in our Sydney warehouse. An extra 17 units available with a short lead time.
The Adafruit Itsy Bitsy 32u4 3V packs the power of an Arduino Leonardo into a tiny 1.4" × 0.7" board. Built on the ATmega32u4 with native USB, it's perfect for compact projects that need a full set of GPIO pins without the bulk of a standard Arduino.
Running at 3.3V and 8 MHz, the Itsy Bitsy 32u4 is programmed via the Arduino IDE using the same USB bootloader as the Feather 32u4 and Arduino Leonardo. It can act as a USB keyboard, mouse, MIDI device, or serial port — no FTDI adapter needed.
Key Features
- ATmega32u4 Microcontroller – 3.3V logic, 8 MHz clock, 2 KB RAM, 28 KB Flash
- Native USB – USB HID keyboard, mouse, MIDI, or CDC serial; Micro-USB connector
- 23 GPIO Pins – 6 analogue inputs, SPI, I2C, hardware serial, 4× PWM, and more
- VHigh Output Pin – Outputs the higher of VBAT or VUSB for powering external devices
- Level-Shifted Pin 5 – 5V logic-level output for driving NeoPixels, servos, or LEDs from a 3.3V board
- Onboard 3.3V Regulator – 500 mA output, up to 6V input, with reverse-polarity and thermal protection
- Automatic Power Switching – Runs from USB or battery (VBAT pin) with seamless switchover
- Compact Form Factor – Just 1.4" × 0.7" (35.6 × 17.8 mm)
Ideal For
- Compact Arduino projects after prototyping on a full-size board
- USB HID devices — custom keyboards, mice, and MIDI controllers
- Wearable electronics and space-constrained builds
- Battery-powered projects with automatic USB/battery switching
Package Contents
- 1× Adafruit Itsy Bitsy 32u4 3V 8 MHz
Resources
The Adafruit Itsy Bitsy 32u4 - 3V 8MHz appears in the following collections:
