Suggested by General Electric documentation from 1968, this circuit activates a relay after 60 seconds, keeping it closed. PUT is an uncommon component today.
This circuit was found in an American technical manual from the 1980s. The LM111 is an uncommon...
This sensitive circuit was found in old documentation. The SCR can be any of the 106 series and...
This circuit is based on documentation from the operational's own manufacturer, from the 80's. The same...