Im thinking of a project that will use a motor like a potentiometer. I will put a handle on the motor and based on how fast im turning it it will produce more voltage thus more output at another pin of the arduino. Is this possible?

well to use it as a potentiometer for the arduino i guess you have to connect the dc motor to the arduino itself so thats the first pin or any pins needed.

How is the Arduino going to measure the negative voltage ?

[image] marinochungus: so it acts as potentiometer but constantly Remember, the voltage will be nonlinear to the speed of rotation, and as @UKHeliBob pointed put, it will only increase, negative direction is a different proposition! You’re probably better off with a small encoder or stepper …

No one mention the problem with brushes, if the motor has brushes. The voltage value being created will bounce around as the segments on the armature will have a different resistance for each segment and will contact two segments at some positions.

why? i never mentioned an ac motor

when you say stepper you mean stepper motor ?

Like what ? How will you be connecting the motor to the Arduino ? Probably between an analogue pin and GND. If so, then what will happen when the motor outputs a negative voltage to the analogue pin ?

[image] marinochungus: when you say stepper you mean stepper motor ? Yes, you can use a stepper motor to generate pulses as you turn it, but you still have to use logic to identify which direction it’s moving.

Motor as potentiometer?

Projects General Guidance

marinochungus June 10, 2024, 1:46pm 14

i guess like that

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Motor as potentiometer?

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