Found in the August 1993 Electronics Now magazine, this circuit employs two symmetrical source 741 op-amps. The output is fed to a true RMS measurement circuit.
) This variable frequency oscillator was found in an old American documentation. Transistors allow more...
Found in the September 1982 issue of Radio Electronics magazine, this circuit triggers a relay...
Using a 106 series SCR, this circuit was found in the May 1971 Radio Electronics magazine. The...