This circuit is an improvement over the previous one, using the same capacitor system as a sensor. We also found it in Radio Electronics from the 80s.
Found in a 1964 Electronic Design, this circuit for 300 mA loads uses components from that period. It...
This circuit was originally suggested in a 1968 publication to generate a white mark (frame) on a...
Found on Popular Electronics this circuit has variations found throughout this site and section....