This circuit was found in the November 1992 issue of Radio Electronics magazine. The circuit has an amplification stage for the relay. The relay is rated at 12 V.
This configuration appears elsewhere on this site. We obtained it from a 90s Radio Electronics, based...
We find this circuit in an old American documentation from the 80's. The integrated is from the...
Found in Radio Electronics from the 90s, in the figure we have conventional voltage doubler with...