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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10V Regulator (CB17574E)
This circuit is from a National Semiconductor manual from the 90s, using an integrated regulator for...
Coded Infrared Transmitter (CB6371E)
This circuit was found in a 1980s Signetics documentation. The integrated circuit is from the era. The...
Power Meter for Transmitters (CB16750E)
This circuit is used to measure the power of transmitters from 3 to 30 MHz with powers up to 100...