Steve writes –
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.
Homebrew toy blaster – Link.
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That’s pretty cool. I have been inserting laser modules in Star Wars guns (in place of the primary LED) for my video game project. This is much cooler and gives you control over all aspects of the firing: how long it lasts, what sounds it makes, etc.