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How to use digital potentiometer to eliminate voltage changes_ How to use digital potentiometer to eliminate voltage changes? Xiaobian found some technical stickers shared by technicians from the network. If it is just right to use it, follow it. Mechanical potentiometers and digital potentiometers have uncertain end-to-end tolerances. The typical value of end-to-end resistance error of digital potentiometers is 20% to 30%. When digital potentiometers and other resistors are connected in series to form a voltage divider network, the deviation of this resistance value may cause some problems, resulting in voltage variation exceeding the allowable error range. This application note discusses a design method of proportional circuit, which converts resistance deviation into acceptable current variation and can effectively eliminate voltage variation. In the circuit given here, the voltage output depends on the ratio of potentiometer, which can also be used in design