ESP-NOW Walkie Talkies Ditch the smart phone and communicate with your buddy by building this set of walkie talkies! A Feather ESP32-S3 Reverse TFT runs Arduino code that uses the ESP-NOW protocol to send and receive I2S audio packets. The w.FL antenna adds extra range to communicate at longer distances indoors or outdoors.

ESP-NOW Walkie Talkies

One Key: Single Button Bluetooth Keyboard Pair this battery-powered ESP-32-based Bluetooth keyboard with your PC or mobile device and then use it for anything you like -- shutter release, mute button, emoji key-combo, wireless undo button, even a macro to type in a very long string of compliments for strangers you meet online!

One Key: Single Button Bluetooth Keyboard

Adafruit MAX44009 Lux Light Sensor This is an easy to use lux sensor, and features an ultra-wide 22-bit dynamic range from 0.045 lux to 188,000 lux. You can use the Adafruit MAX44009 Wide-range Lux Sensor in darkness or in bright outdoors sun, without having to tweak the integration time or gain: the sensor will auto-range for you so you get smooth readings no matter the light level.

Adafruit MAX44009 Lux Light Sensor

Using a Raspberry Pi as a Router Learn how to set up a Raspberry Pi to host a WiFi access point to share internet access from an upstream ethernet or other WiFi network. Enable bridging to to allow devices on the different networks to communicate with each other.

Using a Raspberry Pi as a Router

Star Trek Data Dispenser Build a Star Trek inspired prop with LCARS diagnostics, CO2/Humidity/Temperature graphs!

Star Trek Data Dispenser

Adafruit Terminal Block BFF The Adafruit Terminal Block BFF Add-On for QT Py and Xiao allows you to plug in your favvy QT Py or Xiao board and get screw-terminal blocks on each pin, plus a socket pin you can plug a wire into, as well as an extra Stemma QT port (in case your board doesn't have one) and LiPoly battery usage plus charging. Whew, it's everything you need to prototype your portable QT Py projects!

Adafruit Terminal Block BFF

Bendable Sound Reactive Lamp with WLED Bend it! Fold it! Twist it! Sing to it! Control it with your SmartPhone or any web browser. Take control of your lightscape with Sparkle Motion and WLED.

Bendable Sound Reactive Lamp with WLED

Egg Hunt Maze Game on Fruit Jam Explore endless generated 2D mazes looking for fun and colorful eggs. At the end of each round review the eggs you found and save any that you can't live without to your collection. They'll be saved to persistent storage so you can come back and view them any time.

Egg Hunt Maze Game on Fruit Jam

ESPectre Human Detector for Feather This is an Arduino port of the ESPectre project designed to run self-contained on a Feather ESP32-S3 reverse TFT with external antenna. Unlike typical line-of-sight motion detectors, this project uses sophisticated algorithms to characterize noise in the WiFi streams. Wild!

ESPectre Human Detector for Feather

Adafruit ADS122C04 24-Bit ADC The Adafruit ADS122C04 24-Bit ADC with 4 Channel 2-kSPS is an excellent way to take very high-precision measurements of single-ended or differential analog signals over I2C. Most 24-bit ADCs are found on strain-gauge sensors like the NAU7802 and don't have high speeds or configurations. And most fast-ish I2C ADCs like the ADS1115 top out at 16 bits. The ADS122C04 is a bit more expensive than either but it's one of the few ADCs we've seen that gives you up to 2000 samples-per-second (on one channel) at 24-bit resolution.

Adafruit ADS122C04 24-Bit ADC

Adafruit TMAG5273 3D Hall Effect Magnetometer Breakout The Adafruit TMAG5273 3D Hall Effect Magnetometer Breakout is a low-power linear 3D Hall-effect sensor designed for a wide range of industrial and personal electronics applications. It integrates three independent Hall-effect magnetometer sensors in the X, Y, and Z axes for full 3D orientation detection. The built-in 12-bit ADC can read the signal from each axis for read-out over I2C, it even has a thermometer built in for basic temperature reading!

Adafruit TMAG5273 3D Hall Effect Magnetometer Breakout

Close Encounters of the MIDI NeoPixel Visualizer Kind Build a 6x12 grid of NeoPixel LEDs to create a MIDI visualizer inspired by Close Encounters.

Close Encounters of the MIDI NeoPixel Visualizer Kind

Adafruit VCNL4030 Proximity and Lux Sensor We've all been there. That thing is close but how close? When you need to measure a small distance with reasonable accuracy, the VCNL4030 Proximity Sensor from Vishay can do that for you. If perchance you also need to measure the amount of light at the same time, the VCNL4030 can do that too.

Adafruit VCNL4030 Proximity and Lux Sensor

Tree Branch Wall Lamp with Sound Reactive Lights Add pebble pixel LED lights to a tree branch. Power them with a Sparkle Motion controller and WLED, and give your wall a nature based sound-reactive animated glow. This is a great beginner project with no soldering or coding required!

Tree Branch Wall Lamp with Sound Reactive Lights

CircuitPython on the Xteink X4 eReader The latest object to make us wonder "can it run CircuitPython?" is the Xteink X4 eReader, a super slim pocket-sized device. It has an ESP32-C3 inside with serial over JTAG peripheral available thru the USB port, making it easy to interface with it to load alternative firmware; no teardown required.

CircuitPython on the Xteink X4 eReader

Adafruit TCS3430 / TCS34303 Ambient Tri-Stimulus Color Sensor It acts a bit differently than the color sensors folks are used to, where there are sensors at wavelengths 437nm (X1), 574nm (X2), 537nm (Y) and 434nm (Z) and then the user is expected to calibrate it against a known color space analyzer for their application. For folks that want something that just spits out CIE and Lux data, the OPT4048 is more complete however, there may be some use cases for people who want the raw count data only!

Adafruit TCS3430 / TCS34303 Ambient Tri-Stimulus Color Sensor

Blurry Analog Clock Turn your MatrixPortal S3 into a beautiful analog clock with animated backgrounds that change throughout the day.

Blurry Analog Clock

Adafruit STCC4 and SHT41 CO2, Temperature & Humidity Sensor The STCC4 is a tiny sensor that can measure CO₂ gas and fit in just about any enclosure. It uses thermal conductivity (TC) instead of NDIR or photoacoustic measurements. TC is based on the inherent thermal conductivity of all gases.

Adafruit STCC4 and SHT41 CO2, Temperature & Humidity Sensor

No-Code Snowfall Tracker with WipperSnapper and Adafruit IO Prepare for the next big snowstorm with a glanceable desktop display that monitors local weather conditions using the ESP32 QT PY and WipperSnapper firmware. By leveraging Adafruit IO Actions to process weather data, this project uses the QT PY’s built-in NeoPixel to let you know if it is snowing outside while a 7-segment display shows the total accumulation expected for the day.

No-Code Snowfall Tracker with WipperSnapper and Adafruit IO

Adafruit AS7343 14-Channel Light / Color Sensor Breakout The Adafruit AS7343 14-Channel Light / Color Sensor Breakout is a multi-channel spectrometer, which is a special type of light sensor that is able to detect not only the amount of light present but also the amounts of light within different wavelengths. This means that you can use it to detect much better than the human eye is capable of, what color or colors of light are present. The AS7343 packs within its 3x2mm footprint 25 photodiodes that can detect 11 separate, overlapping bands of visible light, plus one near infrared, one clear and a flicker channel for 14 channels total.

Adafruit AS7343 14-Channel Light / Color Sensor Breakout

Adafruit TMP119 High-Precision Temperature Sensor The TMP119 High-Precision Temperature Sensor is an I2C temperature sensor that will help you easily add super-precise temperature measurement and adjustment to your project. The TMP119 can also monitor the temperature and alert you when corrective action needs to be taken.

Adafruit TMP119 High-Precision Temperature Sensor

LED Masquerade Masks with n00ds Adafruit n00ds are flexible, bendable noodles of light that work just like LEDs. Learn to choose them, connect them, and sequence them.

LED Masquerade Masks with n00ds

Adafruit APDS9999 Proximity, Lux Light & Color Sensor If you want a sensor that's a 3-in-1, the Adafruit APDS9999 Proximity, Lux Light, and Color Sensor has RGB color, lux light level as well as infrared proximity all built into one device. When connected to your microcontroller, it can detect the amount of red, blue, green, and clear light, as well as how close an object is to the front of the sensor. This device uses an I2C interface, so it's easy to wire up and use.

Adafruit APDS9999 Proximity, Lux Light & Color Sensor

Adafruit AS7331 UV / UVA / UVB / UVC Sensor The Adafruit AS7331 UVA / UVB / UVC Sensor Breakout is a perfect solution to UV sensing, no matter what 'type' you're sensing. Most UV sensors do just UVA, maybe ambient light too. But the AS7331 can read and differentiate between all the three bands. You can use it for human and agricultural UV alerts that focus on UVA and UVB as well as agricultural, germicidal, curing, and other UVC use cases. The three measurements are separated, not just mixed together into one number.

Adafruit AS7331 UV / UVA / UVB / UVC Sensor

Arcade Fightstick Use a Pico RP2040 or KB2040 Keeboar to build your own low latency arcade joystick controller. GP2040-CE firmware plus an OLED and NeoPixels take it to the next level.

Arcade Fightstick

MIDI Breath Controller Deep breathing isn't only for mindfulness, it's for sending MIDI CC messages too. You can build a MIDI breath controller with a BMP585 air pressure sensor. This particular sensor has a port that you can attach a tube to for targeted pressure readings. In this scenario, the sensor is attached to a QT Py RP2040 running CircuitPython code that maps that pressure reading range to MIDI CC message values.

MIDI Breath Controller

Melting Picture Frame for PyPortal IoT images Turn your PyPortal into an IoT-connected art gallery that cycles through art, space, cats and dogs! Pull from image feeds or images from an SD card. Skip images with a tilt or shake. Tap the screen to change feeds. Customize your feed, animation and even the audio chirp! 3D print the melted diagonal frame to mount the PyPortal and accelerometer.

Melting Picture Frame for PyPortal IoT images

Moonshine Voice Control on Raspberry Pi Moonshine voice is designed to transcribe real-time audio speech into text. This project uses a USB microphone connected to a Raspberry Pi to accept voice commands to control a strip of NeoPixels.

Moonshine Voice Control on Raspberry Pi

LED Shoji Lamp 3D print a lamp for the Circuit Playground express with swappable multi-color panels inspired by traditional Japanese Shoji lanterns. IR remote controls brightness and colors.

LED Shoji Lamp

Professor Bubbleton’s Breathing Head in a Jar Professor Bubbleton’s Breathing Head responds to the curious with a faint, unsettling breath when the vessel is disturbed. Neither living nor entirely still, it blurs the line between scientific marvel and sideshow horror.

Professor Bubbleton’s Breathing Head in a Jar