Hi all,

Sorry for slightly off topic - but it might be of use to others also.

I need to read 4 voltages at 60Hz and I need the true RMS value. I know
that I could use a true RMS detector/converter by Analog devices, but these
are just too expensive - any others around in small DIP packages ?

OR
Is there some 'appropriate arrangement' of LM324 or similar opamps that
might provide this conversion for frequencies around 50 to 60Hz ?

Any ideas ?

Rdgs

mike
Perth, Western Australia