LeButch

modified 6 years ago

Measure voltages correctly

104

01:53:14

In EC, you can only measure potentials referring to the circuit's ground. Especially in complicated circuits, you might want to measure voltages across one single component. You could use the voltmeter component, but your results are as usefull as Kiani's comments.

So use this setup instead. Just hook up one of those things you never really knew what they did to your component, set it's gain to 1V/V and attach a ground to it's negative output. You can now scope the potential difference between the two inputs. In Germany we would say "Neiße Scheiße alter!" now.

The switch switches between improved and not improved measurement.

published 6 years ago

hurz

6 years ago

this is sold as a so called differential probe for hundreds of dollars to measure ground independent in high voltage environments with your scope. But your childish note about other users is not needed. Or shall we call you little-porno-boy and shall i name you in my circuits in future without any special reason.

hurz

6 years ago

for hundreds of dollar you get 10MOhm internal resistance 1:1 1:10 or 1:100 switchable but 2kOhm and 2:1 is not very common as you demonstrate

kiani

6 years ago

EPIC💤

LeButch

6 years ago

So what exactly is important of what you said, Hurz? Many not related informations but not so many circuit-related ones...

hurz

6 years ago

all technical what i have said is related to this kind of circuit idea. You should think a little more about why you post circuits and what is needed to describe them and what is waste of information.

kiani

6 years ago

@le..ch. You find that auto scaling takes care of reference zero... So if you use a bubble voltmeter, does exact as what you suggest.. Just try and see.

kiani

6 years ago

So basically @hurz saved yiur embarrassment by suggesting the isolated oscilloscope probe.... Otherwise you had no idea why yiu suggest the use of a v. controlled v. source, instead of a bubble... Connect a v. Bubble across the resistor,, you will see, no differences.

kiani

6 years ago

@le..ch. Instead of saying. "whoops," you start your unfriendly...,, i am not going to repeat what maxmax has repeatedly has said to you on several occasions...

LeButch

6 years ago

@Hurz this is not a circuit idea. I show you how to scope voltages over parts not being connected to ground proberly. It is just for the simulation, not for real life.

kiani

6 years ago

But this is a problem in real life. Can not connect oscilloscopes to anything that runs on mains,ansd the need for isolating probes...

hurz

6 years ago

If its just an idea you had for simulation, even more idiotic to destroy the perfect high input impedance with 2x1kOhm resistors. Anyway this idea is not new, but its good to remind the community its possible todo so, but please remove the idiotic 1kOhm resistors.

hurz

6 years ago

Und mit "Neiße Scheiße alter!" hast dich nicht verschrieben? Wieviele Deutsche kennen denn das in dieser Form?

LeButch

6 years ago

I measure the voltage over one of the resistors. What is so hard to understand here?!

hurz

6 years ago

its just half the voltage and a measurment device with 1 or 2kOhm internal resistance is crap

hurz

6 years ago

or you must explain what is device and what is circuit you measure in

LeButch

6 years ago

Bro! I am measuring the voltagedrop over the 1kOhm resistor! I thought it was obvious to you

hurz

6 years ago

By all the idiotic mistakes you did in the past we better dont think you know what you do. Both 1kOhm resistors are not part of your measurement device. Better you make it clear in your description.

LeButch

6 years ago

Not everyone is as dumb as you, so I guess they will understand.

kiani

6 years ago

The circuit description talkes about Epic of Lechuch And Epic. Much more than it says about the thingy circuit. If you make circuit and description to describe and say something personal about your epic self, then the critics will seem personal..

hurz

6 years ago

"trust me i have it in front of me and i can see it myself, LEDs do change thier characteristics when light falls on them, im not as dumb as you think!" LOL, nobody can imagin how dumb you are.

LeButch

6 years ago

Well, the fact that you have to bring up that single mistake of mine again tells me I dont do many mistakes. This one happened around 2 years ago. Get over it.

hurz

6 years ago

yes, i bring just one but the list is much longer as your hostile behaviour demonstrates.

LeButch

6 years ago

Mhm

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