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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Digitally Controlled Filter (CB14368E)
We found this circuit in the Linear Applications Handbook by National Semiconductor. The circuit is...
Radiation monitor (CB5923E)
This wide-range radiation monitor was found in a 1980s documentation. The circuit uses a diode as a...
Guitar Preamplifier (CB24305E)
This circuit is from an article that appeared in the June 1974 issue of Radio Electronics...