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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1800 Hz Decoder (CB20352E)
This circuit decodes a 1800 Hz tone used in communications. The circuit is from an American...
Two megaphones (CB23658E)
These two circuits were found in Radio Electronics magazine from February 1960. The transistor is a power...
PS2 Automotive Power Supply (CB17699E)
With the development and availability of small LCD screens for automotive use, especially in...