It serves as a reference, since today we can have simpler and more compact solutions. This circuit is from an Electronics Experimenter Handbook from 1992. The integrated circuits are from that time.
This unusual audio amplifier configuration was obtained in a 1974 documentation. The PNP...
This circuit was obtained in a 1990 English magazine. The circuit can be assembled with equivalent power...
Found in National Semiconductor documentation, this logarithmic meter is powered with a voltage of only...