Found in American documentation from the 90s, this circuit can be used as a shield with the replacement of the output optical coupler. The operational also admits equivalent.
This circuit, from the 90's, is intended for operation with vinyl record players of the time, as...
Using a zener diode it is possible to change the linearity of the scale of an analog instrument by...
Found in American documentation from the 1980s, this circuit prolongs the ringing of a doorbell or chime...