The idea of this circuit found in a Radio Electronics from January 1966. The idea of the circuit is to improve the reception of audio signals, mainly telegraphy, working as a filter.
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...