The presented circuit uses an optocoupler to trigger a triac. We found it in a Popular Electronics from 1992.
When you speak into the microphone of this circuit, the sound produced in the speaker resembles a robot...
The MC33064 can also be used on this circuit of Motorola's 1993 Linear Interface ICs. The circuit...
This circuit was found in a 1976 technical publication. It is possible to obtain an 11 dB gain in...