Triac driver (CB22446E)

The presented circuit uses an optocoupler to trigger a triac. We found it in a Popular Electronics from 1992.

Touch Switch (CB20417E)
This touch sensor, found in an American documentation on transistors, has gained 8 million times...
2 A Transistor Fixed Power Source (CB15764E)
The block shown in the figure is a basic source with a configuration widely used in technical...
Stethoscope (CB12295E)
The output of this circuit must be connected to the input of an audio amplifier. The microphone is a small...