This circuit from a Popular Electronics from the 90's can generate signals from 0.03 Hz to 3 kHz depending on the value of the capacitor and resistor.
This circuit was found in an American 1980s documentation. The components are current but most...
This simple timer for incandescent lamps or other non-electronic charges uses a triac as a control...
Found in a Radio Electronics store from the 90s, this circuit acts on the alternator. The circuit...