Analog to Digital Conversion Transients
Channel: Measurement in Mechatronics
Date: 2019-11-14

With high impedance voltage dividers, the small current draw into the analog to digital converter on your Arduino or other microcontroller during each conversion may pull down your signal voltage. You can mitigate the effect by adding a capacitor as a charge reservoir, by sampling slowly enough to avoid large current draws, or by using an op-amp as a voltage follower to provide a low impedance output from your circuit.