Car Alarm (CB8925E)

This circuit was found in a 80’s Popular Electronics. The components are common and the 8-ohm speaker.

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Xenon Pulser (CB25962E)
This xenon lamp circuit, also a stroboscope, was found in the May 1996 issue of Electronics Now...
CMOS 4011 or 4001 Injector (CB4608E)
This signal injector uses a single integrated circuit as an oscillator, producing rectangular...
Airflow Detector (CB5168E)
This circuit takes advantage of the temperature variation of the component with the air flow that...