Found in a Hands On Electronics from the 80's, this circuit activates a relay with alternating touches on the push-button. The relay depends on the supply voltage.
This protective circuit uses Shottky diodes on an International Rectifier PVI5033 and IRF7822...
This circuit was found in a 1958’s publication. It uses germanium transistor, availble that time....
It is an ideal circuit for troubleshooting a bench, in addition to testing devices after repair, with...