Sound triggered flash (CB8703E)

Found in 90s Popular Electronics, this circuit fires an old camera flash of the type with a xenon lamp from the sound captured by a microphone.

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Fuzz (CB12093E)
This fuzz effect is from a 1988 Italian publication, but it can be easily assembled, as the...
8-Channel Remote Control Via PC (CB18138E)
The circuit presented, from 2006, serves to control loads at a distance, robots, etc. It can be...
Medium impedance stage (CB20563E)
We found this circuit in an English publication from 1963. The circuit uses germanium transistors of the...