The purpose of this circuit is to measure the intensity of audio signals. We found it in the September 1990 issue of Radio Electronics magazine. The circuit works as a S meter.
We found this circuit in an old English publication. Transistors are general purpose and the block...
Found in a 90s Elektor, the purpose of this circuit is to protect a speaker in case of amplifier...
This circuit controls two relays from a single temperature sensor. The first fires when the...