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Re: Mechanical speedometer drive solution
Did you get this working well enough to post your code somewhere? I was attempting something similar, but had a lot of issues getting a motor to drive the speedo at a stable speed. I think the encoder motor I got just didn't have the power to move the odometer and would dip hard every 1 mile. That pushed me down the road of replacing the guts with a digital stepper motor to just control the needle position directly.
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