This circuit cuts out ads between songs, based on the fact that the speech signal has small interruptions that can be detected. The circuit is from a Radio Electronics from April 1987.
This full wave source uses germanium diodes, and its current is a few milliamps. We found it in an...
This circuit was found in an 80's Electronic Design. The frequency depends on the crystal and the...
Found in an American publication from 1968, this circuit generates pulses at a rate of 2,500 per...