Hi I have a problem with the ADS1115 converter I need to cover a voltage range of up to 100v. I am using a single voltage divider that gives approx 5v with 100v. I calibrated the conversion equation with a 40v battery and a fluke multimeter. I then checked the voltage of other batteries I had of different voltages, all gave different results between the Arduino ana the multimeter where am I going wrong?
I could reduce the range of the voltage divider as it is to test the voltage of a battery through its working voltage so for example a 20s LiPo battery goes from 60v to 84v, if I alter the divider to work with those voltages how much over 5v will the ADS1115 take before it will no longer worked for example set the divider for a 10s battery max 41v and connected a 20s max 84v. This would happen if the wron divider was used for the battery that was being tested
Is the output from the ADS1115 a straight line, a curved onerous curved at the ends but straight in the middle. I have searched the specs pdf and cannot find any obvious answers there. Kendrick