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, which in our times would be called a shield, can also be used with other loads. The...
This configuration, found in other circuits on this site, was obtained in an English publication from...
This circuit causes a sequence of LEDs to run so fast that our eyes cannot detect the change. The...