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Saturday, March 12, 2011

ASync-Firefly - Hack a Day


posted Mar 11th 2011 1:15pm by Noah Dunker
filed under: led hacks

[dev_dsp] wanted to try his hand at creating a purely analog implementation of multiple synchronizing fireflies powered by a single battery and built from off-the shelf, through-hole components on inexpensive protoboard. In theory, even your local Radio Shack should still carry all of this stuff. He was obviously inspired by [alex]‘s fireflies that we’ve covered in the past, but he wanted to see how far it could be taken without the use of a microprocessor.

In the end, [dev_dsp] relied on one crucial piece of digital ware, the ever-popular 555 timer IC, but he’s using analog discrete components to do the grunt work of adjusting the phase of each firefly by feeding a little extra current to the trigger capacitor whenever the flash of a nearby firefly is detected. After the jump, you’ll find schematics and a video demo of three ASync-Firefly modules in various stages of assembly playing with one another while [dev_dsp] discusses their operation.

555 Analog Syncing Fireflies Test

Video Link...

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Go there...

ASync-Firefly - Hack a Day
ASync-Firefly | Make, Hack, Void
YouTube - 555 Analog Syncing Fireflies Test
64 Synchronizing Fireflies - Hack a Day


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