How to convert negative voltage from sensor to positive voltage

Using Arduino General Electronics
1

Hello All,

I am trying to build a sensor system with arduino UNO. The sensor gives negative voltage as onput ( -0,1 V to -2,5 V) and I want to use this voltage as input to the arduino. Is there a way to convert this negative voltage to positive, as UNO cannot take negative values?

2

Swap the + and - lines of the sensor?

3

Need to know more about the sensor, like output impedance.
A voltage divider powered from the 3.3volt pin, and analogRead with 1.1volt Aref could be a possible solution.
Leo..

4

You should post the full data for the sensor, such as a link to the datasheet, before expecting a
useful answer...