This circuit takes advantage of the hysteresis of a relay to provide a latching effect. The circuit acts as a trigger and the components must be according to the used relay.
With this circuit it is possible to obtain a voltage of 24 V using a 12 V regulator. The maximum...
We found this circuit in a 1965 publication by General Electric. The zener is 8.2 V x 1 W and the...
This circuit was found in a Hands On Electronics from the 90s. It turns on an LED to indicate that...