Based on an integrated circuit of the time, this circuit appeared in the October 1979 issue of Radio Electronics magazine. The circuit monitors voltages in the range of 10.5 to 16.0 V.
This circuit connected to the input of a good amplifier, with suitable coils can tune stations of medium...
This circuit was obtained in an American documentation of 1975. The transistor can be the BC548, and...
The values of the components of this Mullard (Philips) circuit depend on the desired voltages. The...