The only thing better than a nice mechanical key is, perhaps, FOUR mechanical keys that also can glow any color of the rainbow - and that's what the Adafruit NeoKey 1x4 QT I2C Breakout will let you do! This long 3" x 0.8" PCB fits four Cherry MX or compatible switches and make it easy to use with a breadboard/perfboard or with a STEMMA QT (Qwiic) connector for instant I2C connectivity on any platform.

Trinkey QT2040 - the circuit board with an RP2040 heart and Stemma QT legs. Folks are loving the QT Py 2040 we made, but maybe you want something plug-and-play. So we thought, hey what if we made something like that plugs right into your computer's USB port? Adafruit Trinkey QT2040!

Half USB Key, half Adafruit Trinket, half mini slide pot! It's Slider Trinkey, the circuit board with a Trinket M0 heart, NeoPixel glow, and a 35mm long 10KΩ slide potentiometer.

Rotary encoders are soooo much fun! Twist 'em this way, then twist them that way. Unlike potentiometers, they go all the way around, and often have little detents for tactile feedback. But, if you just want to add one to your computer, you know it's a real pain. This board is designed to make it very easy.

NeoKey Trinkey, the circuit board with a Trinket M0 heart, a NeoPixel glow, and a Cherry MX-compatible key for input.

What's smaller than a Feather but larger than a Trinket? It's an Adafruit ItsyBitsy RP2040 featuring the Raspberry Pi RP2040! Small and powerful, this microcontroller board is perfect when you want something very compact, with lots of horsepower and a bunch of pins.

What a cutie pie! Or is it... a QT Py? This diminutive development board comes with one of our new favorite chips, the Raspberry Pi RP2040. A new chip means a new QT Py, and the RP2040 is no exception.

It's half USB Key, half Adafruit Trinket... It's Neo Trinkey, the circuit board with a Trinket M0 heart and four RGB NeoPixels for customizable glow! This ATSAMD21 board is designed to slip into any USB A port.

This musically-enabled FeatherWing that adds MIDI input and output jacks to just about any Feather. You get both input and output DIN-5 MIDI jacks, a 3V optically isolator so you can interface with MIDI on 3.3V logic/power microcontrollers, and two blinky indicator LEDs underneath the jacks to help you know when data is sent and received.

Cyber-warriors, listen up here! We’ve got with some zero-day unreleased hardware we just dumpster-dived. Now you can crack kodes, and write skripts with style, thanks to the CYBERDECK HAT and Bonnet for Raspberry Pi 400 from Adafruit zaibatsu.

A new chip means a new Feather, and the Raspberry Pi RP2040 is no exception. This Feather features the RP2040, and all niceties you know and love about Feather. Get started with your Feather RP2040 with this guide!

GPIO expanders work like this: you have a board with some number of GPIO but not enough for your project - maybe you need more buttons or LEDs. You could upgrade to a board with massive number of GPIO like the Grand Central, or you could pop on one of these boards. Connect it over I2C and then you can send/receive I2C commands to control the GPIO pins to write and read them.

Sometimes you'll find yourself with an I2C bus controller on one side, and an I2C bus device on the other and you gotta keep em (electrically) separated. Maybe because one is Earth-grounded, maybe because you've got some funky power monitoring setup, maybe you want to reduce noise. Whatever it is, you can use the Adafruit ISO1540 Bidirectional I2C Isolator to add full electrical isolation between two sides of an I2C bus.

Sensirion Temperature/Humidity sensors are some of the finest & highest-accuracy devices you can get. And finally, we have some that have a true I2C interface for easy reading. The SHT4x sensor is the fourth generation (started at the SHT10 and worked its way up to the top!).

This breakout is for a fascinating chip - it looks like an SPI Flash storage chip (like the GD25Q16) but its really an SD card, in an SMT chip format. You can wire up like an SD card breakout and use the SD card libraries you already have for your microcontroller. For example, you can use the built in SD library in Arduino, or for CircuitPython we have an sdcard library. The breakout will act just like a 512 MB sized card with FAT formatting (it's pre-formatted).