This is my Halloween costume from 2013. It's based on the Cucurbito baddy from the video game "Serious Sam: The Second Encounter" from 2002.
When I originally put this together two years ago the chainsaw "blade" was just a sheet of 1/4" plywood with a motorcycle chain around it. Nothing moved, but I would crank up the chainsaw for effect when the timing was just right. Cucurbito took a break last year and I decided if I was going to do the costume again I would need to "kick it up a notch".
There are 72 super-brite, red LEDs from www.superbright... (Part Number: HF5-R5590) arranged in four banks of 18 LEDs each. A 4-channel Seeed Studio relay shield (version 1) sitting on an Arduino Uno controlled the four banks of LEDs. The LEDs are triggered when the sound pressure level rises above a certain level, and the delay between turning the banks on and off is reduced as the sound pressure level rises, making the "chain" spin faster. I used a ZX-Studio sound pressure module and some code published by Pierre Baillargeon to smooth out the output into something useful. With another day I would have made some changes to the code and really dialed in the volume and how the "chain" responds to the engine noise. I just ran out of time.
I put a couple of the same LEDs in the mask, first with super glue to position them and then with a big blob of five-minute epoxy to make sure they didn't move. In hindsight, I really should have painted the back side of the epoxy black to keep the red light out of my eyes. I couldn't see a thing after it got dark. However, because the LEDs lit up my face there was some extra glow coming through the nose and vent holes that looked really cool. My wife said I didn't even need the chain saw -- the glowing eyes were seriously creeping people out.
Негізгі бет Cucurbito, Serious Sam, LED Chainsaw, Arduino, Seeed Studio Relay Shield, ZX-Sound module
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