This power supply was found in the same 1990 special issue of Radio Electronics Experimenter magazine that describes an amplifier of up to 100 W per channel with the LM12.
This circuit draws one of the three possible guesses of a sports lottery logo: column 1, 2 or the...
This Tesla coil was found in the November 1994 issue of Electronics Now magazine. T1 is a TV...
Hartley oscillator operates in the audio range. Frequency can be adjusted by P1 and also depends...