This circuit was found in the January 1989 issue of Radio Electronics magazine. The circuit sends audio signals by modulating a low-frequency carrier through the power grid.
We found in this American documentation this circuit for activating common cathode displays. In it we...
We found this Nicad cell charging circuit in an English publication from the 1970s. The circuit can...
This circuit only works with incandescent lamps and the frequency is adjusted in the pot,...