We found this touch control on a Popular Electronics from 1970. The circuit makes use of an integrated of the time. It can be adapted to use modern equivalent components.
We found this easy start circuit in Electronics Now magazine from December 1993. The frequency is...
We found this circuit in an old American documentation. The circuit can be applied to modern...
This differential amplifier, found in a 1964 Electronic Design, has a gain of 30. The setting can be...