I do not see how are you going to measure current without a shunt. And if you read the next post from wilbe "4.6" of copper #14 AWG wire" will do the trick .. and will cost next to nothing.
I get it
wait, you want to measure current on AC system and you expect to get a "ready" signal ?! that you do not have to amplify??
Normally a CT will give a good voltage strength as I have seen and can be used w/o amplification
What about it !? You just need to adjust R7 to get proper current trough leds, that's all, and donno why on schematic R7 is marked 25W when the simple 1/4W should do ..
ok
Not sure what are you trying to say here. What would be the point to replace the opto's with diodes ?!?!?
I was reffering that use diodes instead of the LEDs so that using optos is eliminated.My ckt doesnt have isolation from mains..so it would not be wise to use an opto unless it was really necessary.
You can also go with contact less measurement ... make a coil, pull one wire of the AC supply trough the coil and measure inducted voltage... can't get simpler than that ? (but you will still have to use opamp to amplify the signal
)