Buffered Detector (CB6669E)

This circuit was found in 1967 General Electric documentation. The transistors of the time can be replaced by modern equivalents.

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Temperature alarm (CB7529E)
This circuit triggers producing a loud sound when a change in temperature is detected. The circuit...
Darlington Photo Trigger with Reset (CB14659E)
We found this circuit in the Texas Instruments opto-electronics manual. The button resets and the...
Light-sensitive circuit (CB23962E)
We found this circuit in a Radio Electronics issue from July 1969. The lamp remains on until C1...