Opamp and optocoupler

And they're still not galvanically decoupled.

@thebugger You wont be able to read the values if you remove the 0V reference from the secondary side.

When will buggzy learn what the use of "ground" is. Again, call it zero volt reference (ZVR). Before the optocoupler and after it you just make a choice were you would like to have 0 Volt. EC could have separate them (ZVR0 and ZVR1 .. ZVRn) as they are in reality separate are. But this would need extra symbols, which are not needed. This way its a full galvanic perfect separation!

@ hurz, having worked on systems that had upto 12 seperate zero or common returns, I would have to fully agree with you.

Right Billy, even they look the same in schematic check the name it might be a different zero volt reference.

In circuit drawings it's very unprofessional to use the same grounding symbols after a deliberate galvanic separation according to me. It may give a wrong idea to an inexperienced builder, and maybe even electrocute him. This is why I use different grounding symbols when I need to galvanically separate some parts of the circuit. That's the reason there are multiple grounding symbols.

https://goo.gl/images/fL7vQm I find this grounding labeling system much more useful and easier to follow.

EC does not support different zero volt references. You are inexperienced and never designed a circuit with multiple grounds as you proofed with your first comment here. So leave it as it is and dont try to turn anything around.

Let's just leave it to the almighty hurzy. Just shut up already, you know it all. You know I'm right, you just can't shut up.

What about you are right? You called us unprofessional because we use ground symbols with 12 different labels. I dont have 12 different symbols for ground, sorry. Maybe you can make 12 different ones with your lego....tell us your tool for schematic entry with unlimited different ground symbols, whats the name? everycircuit has only ONE and it is absolut stupid to tell @perivar its not galvanic separated if EC do not give you the possibility. But we all know he used a CCCS to demonstrate the separation. So why your useless comment and now turn again everything upside down. Typical buggzy. Stay by the facts. Your comment was absolut usless or you still dont understand the concept of EC ground and still believes its possible to have 12 different ground levels. Show us or shut up.

No man, your comment was useless. I was just pointing out how it's not correct to use the same grouns symbol for galvanically isolated circuits.

Then show us thebugger correct circuit in everycircuit

An EC Earth suggestion http://everycircuit.com/circuit/6196116260651008

Im waiting for almighty buggzy

Still waiting for buggzy .....

Buggzy, were is your galvanic separated circuit as you promised in your first comment?

Buggzy said, @thebugger:"And they're still not galvanically decoupled." And we are waiting how he is doing better. Buggzy come on!

There you go, you whining child. Boy you're the biggest pain in the ass I've ever known. http://everycircuit.com/circuit/4877123147005952 the ground is essentially decoupled, and EC is tricked into believing the second half has the same ground as the first half of the circuit, where it does not. It's a more proper way of showing a different ground here in EC when it does not have different ground symbols. Having a chassis ground would much simplify things.

Oh buggzy baby, this is not even working for the simplest rectifier supply circuits, and this is NOT a galvanic seperation! http://everycircuit.com/circuit/6646387210190848

And please, do not come with a bigger cap in pF range plus 10MegaOhm resistor. All this we have for years already discussed. Its not new and its also not very clever. Ground is everywere in EC even were you do not expect it. Check this and let us know how you make circuits without these components, because they all have ground inside, lol http://everycircuit.com/circuit/4655479749083136

It may be everywhere in EC, but it's not correct to use the same ground symbol for galvanically isolated circuits, and you damn well know it. It teaches newbies wrongly, and they may very well make an error when trying out something in real life. Imagine using the same reverseable ground with a transformer. Half the time their circuit will be live and extremely dangerous.

Its not wrong (later on more), but i agree its not ok for newbies. But as long EC does not support different grounds its useless/idiotic to try to split them as you did now after extensive search over hours you havn't found a working methode. But im sure you did not realised that at your first comment. The only way is to mark ground as 2ctiby suggestion, and highlite it in the descriptions. BTW, its not dangerous if you know what you are doing and keep you exactly at the schematic where ground is placed. Ground is zero volt at not dangerous. The dangerous wire is galvanic separated and also not dangerous. Its only dangerous if you do not connect ground to the case/chassis and swap the input wires and touch the box. But newbies must just follow the schematic and if they do not know, they are on themself.