Hi, I have a circuit which consists in a wheatstone bridge where one of the resistors is a two wire RTD for measuring temperature. On the arduino analog pins, the difference in voltages relative to ground on the bridge is 0.17 Volts. When I measure the voltages with my multimeter I read 0.1 Volts…

Different voltages between arduino UNO and multimeter

Idahowalker November 5, 2021, 1:46pm 5

Use the internal reference of the MCU. You'll have to change a few parameters but its more stable.

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