If you need a simple idea for Halloween, you could use giant sheets of posterboard to become Pac-Man and some of his ghosts. If you wanted to take that to the next level, do what Instructables user techy101 did and build Pac-Man so that he can chomp everything in his path. He even built in speakers so he could play sounds from the game. He built a frame from PVC pipe and constructed the sides of the costume from cardboard. Here’s how he built the mouth (spoilers: it wasn’t simple):
The mouth was the bane of my existence for this project. I built two smaller pizza slice shaped frames that sat just inside of the main outer frame. I built a jig out of screws on my work bench to bend the CPVC in and then used a heat gun to make them hold the shape.
Once the two “jaws” were built, I installed them with steel wire and electrical tape at the back corner. This allowed them to be flexible, but to also hold in place.
For the movement I installed pulleys using steel wire and electrical tape, and fed the rope though them. This took the better part of a week to get working properly, so patience is a virtue. I didn’t want to have to open the mouth back up, so I also attached Thera-Bands to act as a retraction mechanism. After some tweaking they worked beautifully.
The jaws did have a problem with recessing too far into the suit, so I added “stops” for them.
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Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.