Twilight Simulator (CB26055E)

This circuit simulates dusk by slowly dimming an incandescent bulb. It was found in the August 1998 issue of Electronics Now magazine.

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2 A Transistor Fixed Power Source (CB15764E)
The block shown in the figure is a basic source with a configuration widely used in technical...
1 kHz Bandpass Filter (CB24388E)
Found in July 1975, Radio Electronics magazine this circuit can use any operating circuit,...
LM3900 Piezoelectric Transducer Oscillator (CB14223E)
This oscillator produces an audible signal on a piezoelectric transducer. The frequency is...