Found in American documentation from the 90s, this circuit keeps the high beam on for a time determined by the trimpot adjustment. The relay is sensitive 12 V.
This circuit was found in a 73 amateur radio magazine from the 90s. An LED extends the scale from 0...
This small inverter that produces high voltage from a 6 V source was found in an American...
This circuit was found in a 1967 Philips publication. Transistors support equivalents and modern...