Electronics > Beginners
Voltage Divider Affected By Load
<< < (4/4)
Johnex:

--- Quote from: JourneymanWizard on June 12, 2018, 10:26:41 pm ---Hmmm.

First guess would be back EMF from the rotors?  Can you 'scope your power lines?  Try filtering your ADC node to ground with some ceramics?  0.1uF, 1.0uF, something like that

Second guess would be voltage drop between reference points (ADC ground reference different from divider ground reference).  Try a star connection for all your power to Arduino and voltage divider, and ground of your ADC and divider and Arduino.

--- End quote ---

I think you might be on to something with the different ground levels. I will try making a new ground link and see if it changes anything.
Johnex:
@JourneymanWizard
You were totally correct. I made a new link from the large wires to the ADC ground and that fixed the issue, now i get a small voltage drop as expected!  :clap:

Thanks to everyone for the ideas and help, really appreciated!
Navigation
Message Index
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod