This timer, like the previous circuits, uses a currently uncommon integrated circuit. The time is given by capacitor C1 and R2 which has the range of values indicated in the diagram.
Found in a 1968 American documentation, this circuit generates 1 kHz signals. The SCR used is not a...
We found this circuit in a 1968 Electronics World. The transistors are from the era and...
This circuit was found in a 1965’s General Electric documentation. It is intended for low voltage...