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.
Found in an Elektor from the 90s, this circuit can be powered directly by the power grid. The...
This amplifier was published in the July 1961 Radio Electronics magazine. It announced the release of...
The speed of the motor connected to this circuit depends on the amount of light that strikes the...