This circuit for alternating current loads has a built-in timer. SCR2 is according to the motor current and must be equipped with a heat sink. The circuit is from a 70s GE documentation.
This stage with polarization of only one resistor can use any general-purpose transistor. The...
We found this circuit in a Radio Electronics from the 90s. The circuit is for conventional analog...
Two of the four gates of a 4011 is used in this biestable touch circuit. Do not use a power source...