Triac activated switch (CB9088E)

This circuit is from an 80's Radio Electronics. It triggers a load powered by the power grid from the audio signal captured by the microphone.

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Super Regenerative Receiver for 90 to 150 MHz Ban (CB1427E )Super Regenerative Receiver for 90 to 150 MHz Ban (CB1427E )
This receiver receives signals from the VHF band with earpiece or application in a power stage. The...
Teleprinter power supply (CB8847E)
Originally created to power an 80's RTTY printer, this circuit can be used in other applications. The...
Siren for motorcycle (CB6491E)
This circuit is from a Popular Electronics of the 90's. Any power MOSFET can be used. The circuit...