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 is the receiver for the previous circuit found in the November 1991 Radio Electronics...
This interesting circuit was obtained from a Poptronics of February 2001. The American magazine no...
With this circuit a logic output signal from a microcontroller or other digital TTL configuration can...