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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Wow Wow Effect for Guitar (CB9092E)
This circuit is placed between the instrument pickup and the amplifier input. The same version can...
Touch Switch (CB449)
This circuit triggers on a lamp when the sensor (a metal plate us touched). Up to 100 W...
Multimeter with the CA3140 (CB12314E)
We obtained this circuit from a 1993 documentation. The circuit has current and voltage ranges that...