This bidirectional motor control was found in an 80's Electronic Engineering. The circuit uses a component of the time and is suitable for motors up to 1 A.
We found this timer for times of a few minutes in a 1974 Ferranti transistor manual. The relay is 37...
The SCR sector of this circuit can be powered by high voltage AC and instead of the LEDs we can...
This circuit was found in a 73 amateur radio magazine from the 90s. An LED extends the scale from 0...