Search found 2 matches

by Skyscraper1450
Mon Jul 31, 2023 7:56 am
Forum: Hardware
Topic: Simple voltage divider - ADC giving wrong readings?
Replies: 2
Views: 926

Re: Simple voltage divider - ADC giving wrong readings?

You are right I did assume that. However i found this image which confirms that the voltage range is 3.3 V. Maybe it can also explain the error that im facing, in which case the "wrong" reading is related to the non linearity of the ADC. I have heard of the non-linearity of ADCs before, but i had no...
by Skyscraper1450
Sun Jul 30, 2023 1:52 pm
Forum: Hardware
Topic: Simple voltage divider - ADC giving wrong readings?
Replies: 2
Views: 926

Simple voltage divider - ADC giving wrong readings?

Hello everyone, so I have been experimenting with an ESP32, building a simple voltage divider to test the ADC. As i have been using R1 = R2 = 1000 Ohm I was expecting to read 1.65V or a data value of 4096/2 = 2048. However I am just reading ~1700 which corresponds to ~1.36 V. I checked this with a m...