Overload Alarm (CB6082E)

This circuit is from a 60's documentation. The circuit uses components from the era and serves to monitor a 150V continuous power line.

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Police Band Receiver (CB23560E)
This circuit is from Radio Electronics magazine from June 1958. The tuned range at the time was...
Infrared receiver for single tone (CB20982E)
Found in Popular Electronics from the 90's, this tuned to infrared modulated receiver uses a PLL....
Symmetrical 5 or 10 V power supply (CB24578E)
This circuit was found in the March 1979 issue of Radio Electronics magazine. Integrated circuits must...