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 siren produces an intermitent sound given by the characteristics of the two oscillators using the...
This circuit for some amps was found in a 90s Radio Electronics. The voltage can be between 6 and 25 V...
This circuit was found in a 90s Electronic Engineering. The circuit has the tube's critical...