Found in 1967 General Electric documentation this circuit uses a PUT and a diac to generate 1 kHz signals. The circuit has a start switch.
We found this circuit on Radio Electronics from July 1990. It triggers a relay with a touch of the...
These three circuits have different treble responses. We found them in the February 1970 issue of...
This photoelectric cell light relay was found in Radio Electronics magazine from April 1958. The...