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 a Radio Electronics Constructor, English magazine from April 1976; The...
This circuit was taken from Maxim documentation from the 90s. The components are from the period....
This circuit was found in an Electronics World of 1968. It can be applied to any modern triac and...