This high voltage circuit was found in a 1970 documentation. The integrated one is of the time and modern equivalents can be tested. The resistors of the voltage reducing system must be calculated.
This circuit contains a voltage doubler that comprises two diodes and two capacitors, in order to...
Radio Electronics magazine published in a 90's issue this simple alarm that can use any general...
This circuit is from the time when slide projects were used. We find it in a 90's Wels’ Think...