Adafruit ItsyBitsy 32u4 - 3V 8MHz

What's smaller than a Feather but larger than a Trinket? It's an Itsy Bitsy! This compact and powerful Arduino-compatible microcontroller board is perfect when you need a small form factor but still want a bunch of pins.

Measuring only 1.4" long by 0.7" wide, the Itsy Bitsy 32u4 - 3V 8MHz features 6 power pins, 6 analog & digital pins, and 17 digital pins total. It offers much of the same functionality as an Arduino UNO or Feather 32u4, suitable for projects where size matters.

It uses the Atmega32u4 chip, the same core in the Arduino Leonardo and Feather 32u4, running at 3.3V and 8 MHz. The board supports programming via the Arduino IDE and is compatible with many projects out of the box.

• ATmega32u4 chip in QFN package
• 3.3V power and logic, 8 MHz clock rate, 2KB RAM, and 28KB FLASH
• USB bootloader with LED indicator, AVR109 compatible
• Micro-USB jack for power and programming
• USB HID Keyboard, Mouse, MIDI or CDC serial device functionality
• On-board 3.3V power regulator with 500mA output and ultra-low dropout
• Special VHigh output pin supplying higher of VBAT or VUSB voltages
• Digital #5 pin with level-shifted output for 5V logic devices
• Power from USB or external VBAT pin with automatic switchover
• Red on-board pin #13 LED
• 23 GPIO total with 6 analog inputs, SPI, I2C, and hardware serial ports
• Compatible with NeoPixels, sensors, servos, and more
• Reset button for bootloader mode or program restart

This board is highly suitable as an upgrade from the Pro Trinket 3V due to native USB, serial debugging, and reliable bootloader support. You can also add a rechargeable battery backpack for portable use.

Product dimensions: 35.0mm x 17.0mm x 4.2mm (1.4" x 0.7" x 0.2") and weight: 2.7g (0.1oz).

Learn more, download schematics, and find project ideas on the Adafruit learning guide.