Strobe Warning System (CB26230E)

We found this circuit in volume 5 of the 1995 Encyclopedia of Electronic Circuits. It fires a high-power pulsating xenon light.

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Ultrasonic ear (CB21314E)
This circuit was found in a Popular Electronics from the 90's. The output signal can be applied to a...
Using a Loudspeaker as Microphone (CB831E)
A small loudspeaker (2.5 or 5 cm) can be used as a low impedance microphone. A preamplifier and...
Transistor Flip Flop (CB20130E)
This flip-flop circuit with general purpose transistors was found in American documentation from...