This circuit is from 1970 documentation. The SCRs are types of the era that can be replaced with 106 Series equivalents. The circuit is powered with 100 V dc.
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...