This Adafruit MCP23017 I2C GPIO Expander Breakout has 16 GPIO with matching ground pad. It runs happily from 3V or 5V logic and power. With 3 address pins, you can have up to 8 on a single bus for a total of 8 x 16 = 128 GPIO all on one I2C bus!

The ESP32 Feather V2 is a significant redesign of the original! It includes 8MB of flash, 2MB of PSRAM, a NeoPixel, a user button switch, a STEMMA QT port, and much more! The ESP32 has both WiFi and Bluetooth Classic/LE support, making it perfect for just about any wireless or internet-connected project!

This guide gets you started with making your own MIDI projects. It details what MIDI is, how it works, what components you can use in your projects and six examples to get started with.

Use CRICKIT and CircuitPython to make a motorized zoetrope with edge lit acrylic.

Make your own Mini VU Meter with NeoPixels and CircuitPython

Using audio jacks and potentiometers, you can build a passive mixer to bring together all of your favorite synths.

This MIDI controller uses a Circuit Playground Express and CircuitPython to send MIDI notes. The interface is made with 3D printed squares and copper sticker sheets that press together with springs.

3D print parts to make a Menorah that snap fits together. Use QT Py RP2040, NeoPIxels and CircuitPython to make an elegant looking build with LED animations.

Play this digital version of dreidel by dropping chocolate coins through a coin slot at the top of the RGB matrix. The dreidel will "spin" and if you win, the chocolate coins will be dumped out with a servo motor.

This project uses a Feather RP2040, Adalogger FeatherWing and an SCD-40 to log CO2 data to an SD card. This allows you to monitor your air quality on the go without having to worry about an internet or BLE connection.

These breakouts are three in one: an ATtinyxxx development board, a seesaw board, and a STEMMA QT I2C controller or peripheral! This mini development board lets you design with ATtinyxxx, or acts as a little I2C-controlled friend to do all the timing-sensitive things many microcontrollers and microcomputers are not good at.

Use Feather Sense and IS31FL3741 LED Matrix to make an audio visualizer with CircuitPython

Easy eInk display usage comes to microcontrollers with breakouts designed to make it a breeze to add a tri-color or grayscale eInk display.

Use Feather Sense and CircuitPython to make a BLE gesture controlled mouse using accelerometers and proximity sensing

Use the 1x4 NeoKey, QT Py RP2040 and CircuitPython to make a dedicated keyboard of your favorite Emoji's.