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homebrew toy sound and light effects

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Published on Jan 14, 2008

i am learning about electronics by building a toy laser gun. This is the sound and light effects circuitry in development

The top board has a 555 monostable timer, which turns on a bright red LED, a laser, and the sound effect. It also triggers a second board, which has 555 oscillator which is triggering a 4017 decade counter chip. That circuit is the blue LED chaser. I have it timed so that it goes one cycle during the time that the trigger from the first timer is high. Whew! a lot of work to turn on a couple of blinky lights.

You can follow the project as it develops:

http://www.finkbuilt.com/blog/categor...

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