Hi I am hoping someone can help me, im having an issue with my hardware and software. I found this link http://www.skillbank.co.uk/arduino/measure2.htm it uses a voltage divider with an op-amp that helps read voltages using my Arduino. However I believe I am doing something wrong, as my voltages…

Voltage Read with op-amp

MarkT October 25, 2021, 2:38pm 9

AREF needs 100nF cap to ground as per the datasheet. Otherwise all analog readings will be unstable.

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