The circuit shown in the figure below is from the 1993 Linear Technology Applications. The operational ones used are uncommon and the use of equivalents can be analyzed.
Found in a 90s Popular Electronics this circuit has its gain given by R2. This component can be...
This circuit is from a 1967 publication and applies to incandescent lamps up to 600 W. Triacs must be...
The frequency of this circuit is approximately 1 Hz. Whenever the output is at low level, the LED...