This analog instrument circuit was found in a 1990s William Sheets. The components are common and are only suitable for cars with mechanical switching (platinum).
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...