This circuit was found in an American 1980s documentation. The transistorized step is the receiver's last IF and the diode is the receiver's existing detector.
The circuit shown in the figure can indicate the presence of static charges by lighting a 6 or 12 V...
This double time constant circuit for resistive loads was found in documentation from the 1980s. The...
This simple circuit was found in the Spanish magazine “Todo Electronica”, in an edition of 1996....