Claws-down, Halloween is my favorite holiday. Add some electronics to the mix and it’s an unstoppable force of nature.

In this simple no-soldering-required project we’ll make the Adafruit Circuit Playground Classic or Circuit Playground Express board act like a flickering candle. Pop this inside a jack-o’-lantern (or any other item that might normally use flame) to create a festive spooky atmosphere. (This can also work with an Adafruit Hallowing board with a NeoPixel strip plugged in the NEOPIX port.)

Sure, one can just buy a fake battery-operated candle, but they’re usually pretty dim. Also, we can take this as an opportunity to learn a bit about code…and once Halloween’s over (how sad!) the Circuit Playground board can be used again in endless other projects.

Items needed:

• Adafruit Circuit Playground Classic or Circuit Playground Express board.
• Either a 3xAAA battery holder -or- a USB phone charger & cable
• Pumpkin and carving tools, or other decorative item to illuminate (very effective with paper lanterns!)
• Zip-Loc bag, if using a real pumpkin

If this is your first time using Circuit Playground, start with our “Introducing Circuit Playground” or “Circuit Playground Express” guide. There’s some software to set up on your computer and some procedures to learn. Try out a couple of the examples, make sure you know how to upload “sketches” (code) to the board.

Powering the Project