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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Noise-free 60 Hz pulses (CB7293E)
Suggested by Linear Technology in an old documentation, this circuit produces 60 Hz rectangular...
Non-inverting integrators (CB6842E)
Obtained from an Electronic Engineering of the 90s, these circuits can be applied to almost any...
High Voltage Source (CB20217E)
This source is indicated for the supply of high-power valve circuits and other types that require...