Some characters are classic go-tos for Halloween: mummies, ghosts, Dracula, and the Headless Horseman. Instructables user digitalaudiotape was inspired by the latter character last October but dressed up the ensemble with LED and sound effects from a Bluetooth speaker. It was a way of leveling up the spooky Sleepy Hollow haunt. He designed the LEDs to mimic light from a flame — which is the scariest way to light the inside of a detached pumpkin head. The core of the effects is held in a deli quart container:
The core of the Jack-O-Lantern Pumpkin Head is a module composed of a plastic deli quart container, a strip of W2812 LEDs with a built in microcontroller called BlinkyTape, and a UE Mini Boom bluetooth speaker.
To build the lights+speaker module, coil the LED strip into the quart container with the connector end towards the opening of the container.
Next, connect a micro USB cable to the LED strip to later connect to a portable phone charger (not pictured).
Finally, insert the speaker into the quart container with the USB cable dangling out. The USB cable needs to dangle out so it can be connected to a phone charger. With some force you should be able to get the speaker to sit snugly inside the container. Make sure to point the speaker towards the inside of the container towards the lights. Later you will cut holes in the bottom for the sound to escape.
You can check out the lighting and sound effects in the below video:
Get complete details about the build at Instructables.