We found this circuit in a magazine 73 for radio amateurs from the 80's. The circuit makes use of an epochal component which is programmed according to the table beside the diagram.
This circuit for igniting gas flames was found in a 1967 Electronic Design. The SCR firing device is a...
We found this circuit in a 1966 US documentation. It simulates a variable capacitor that can vary...
Found in Radio Electronics, this circuit is intended to activate the lighting system of garages...