Suggested by General Electric documentation from 1968, this circuit activates a relay after 60 seconds, keeping it closed. PUT is an uncommon component today.
Published in Popular Electronics with the curious name of Obnoxious Noisemaker, this 1968 circuit...
This preamplifier circuit for turntable cartridges was found in the March 1994 issue of...
E) This circuit was found in documentation from the 1980s. The integrated circuit used is not very...