5874E)
This circuit uses an optocoupler to switch a load on the power grid. The circuit is from Electronics Now magazine, July 1995. The CA3059 is not common today.
Found in a 1979 documentation, this circuit measures resistances on 5 linear scales. The precision is...
This circuit, from 1990 documentation, can be assembled with BC558 transistors for Q1 and Q2,...
Found in American documentation from the 90's, this JFET stage has an input impedance of 500 M...