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.
This circuit was found in Radio Electronics magazine from August 1966. The transistors are from...
We found this circuit in an old documentation for radio amateurs. The circuit uses an analog...
This circuit is found in a 2005 Linear Technology application manual. The circuit monitors the High...