Dear all,
I'm a project that uses the zero crossing circuit using an optocoupler and a schmitt trigger on the output to insert it on a microcontroller.
I want to see all the wave forms in a oscilloscope, so that I'm using 2 oscilloscope with 4 channel each one.
The first one is on the source, then before the resistor of 47k, after the resistor and finally after the output at the optocoupler.
The second oscilloscope is at each output of the cmos 4093 that is the schmitt trigger IC.
There is some problems when I simulate the circuit that is in the first oscilloscope I'm having trouble with the ground reference. Each time I change the ground I receive a diferente wave forms from the Channel A - Tension Wave. It should be a sine wave from 220V.
I have already done this circuit on Proteus, but for my purpose, Multisim is more complete to do all the project in it.
I'm attaching my circuit on MultiSim and the wave form that I want from Proteus on Multisim.
Kind regards,
Daniel Oliveira.
