This audio circuit was published in a Rado Electronics issue from October 1963. The transistors are from the time and the output is low impedance. Power is supplied with a voltage of 12 V.
Unlike the previous one, this circuit uses only one resistor in the base polarization. The...
This conventional LED effects circuit uses integrated CMOS. Today we can achieve the same effects...
This circuit was found in an old American publication. It makes use of an integrated circuit...