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thank you all for the responses. I establish that if I not leave the input floating, my solution works even when I connect the Vin- to GND. The shift only occurs when I don't have any voltage source on the input.
The accuracy of the ADC is another issue, that we will be struggling with, but at...
I'm using the NCV20074DTBR2G 4 channel amplifier
As per Klaus' recommendation I changed the schematic to invert. Have I done this correct?
Can you please reference the resistors values that you are recommended to the R1, R2, etc on the picture?
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Actually I'm trying to...
Hi Klaus, thank you for taking your time to respond, I did find your comments useful but they brought some more questions...
https://www.esp32.com/viewtopic.php?t=2881
this should be better and the resistors are with the values I calculated for -32 to +32V input
Agree, what I meant is the...
I have something that I thought is a trivial problem and I have been trying to resolve for a while now with no success, thus I decided to reach out to you for help.
I’m trying to create a little device that will measure voltage 0-32VDC (preferably -32V to +32VDC so in this way no polarity...
thank you for your reply,
I don't really understand what you are trying to tell me. I have very solid 3.3V and decoupling capacitors on every IC in my circuit. I know that power supplied to the opAmps and the uC is not the cause of the issue.
I'm piggy-backing from older analog gauges. there is...
Hi KlausST,
Thanks for helping me with that hint. I do understand the basics of the star principal, but in real life is hard to accomplish that. I do have extensive ground plate on my PCB with many vias, to help having the same ground potential at different points on my PCB. I doth think my...
Hi All,
This is my second attempt to post my question on the forum. My first post did not show up after pressing the post button, so I'm not sure what exactly happen there... It appeared that the posting went through, but did not show up, so I thought it might take some time if it needs approval...
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