Found in a 1965 Electronic Design, this circuit limits surges in a load when power is applied. The diodes and SCR must be according to the load.
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...