Bring out your naughty side with these DIY devil horns. The horns are made from paper mache and filled with high-density LED lights that flicker and glow like burning embers.

The lights are controlled by a PropMaker Feather RP2040. This board has got an onboard accelerometer that can read your head gestures and trigger different animations based on your movements. There is CircuitPython sample code that animates the horns with a slow lava-flow animation when you tilt your head, and a flare-up spark animation when you give your head a shake.

This is an intermediate level project that requires a little careful soldering and a lot of hot glue.

The power behind this project is the Adafruit RP2040 PropMaker Feather. It has an onboard accelerometer, onboard battery charging, and a screw terminal for easy wire connection. This board is a workhorse and can make your project interactive in a lot of different ways.

Parts

These are the highest density pixels we carry. They're tiny and a bit delicate, and can be tricky to solder, but they're just right for illuminating a small space and getting buttery smooth LED animations.

This little battery will run the horns for several hours, depending on how bright you set them. It hides easily on top of your 2" headband and can be recharged via USB, without having to remove it and put it on a charger.

Get some hook up wire in 3 different colors: for this project I'm using black, green, and red.

You'll Also Need

• A 2" wide headband - I got mine at Dollar Tree, or here's one on Amazon
• Titebond III Wood Glue
• Paper towels, saran wrap & aluminum foil
• Wig clips or hair combs to secure the headband to your hair
• Faux Flowers or other decor items, and craft wire to hold it all together

Tools

• Soldering iron & accessories
• A tiny flat head screwdriver - here's a great set from our shop
• Hot glue gun & sticks