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handwheel potentiometer

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banh

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hi,

i need to find something like a car steering wheel, and its funtion is like a potentiometer, i.e. as you turn the resistance changes.
anyone knows where to buy sth like that?

thanks.
 

Slayerza

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Does the wheel have to rotate 360° or more? If so than maybe a normal potentiometer and some sort of gearing can do the trick. Something similar to the inside of a servo motor.
 

philba

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I've thought about doing something similar but lean towards a different approach. I would use some sort of a quadrature encoder on the wheel axle to generate a series of pulses. This can go into a cheap little uC to then drive an electronic pot, iif a resistive output is desired output or used directly in a microcontroller.

The big advantage here is that you don't use mechanical parts that can wear out. I think you would need to get a pretty good pot to have a reasonable life span. Also, wear on a pot will likely change its linearity.

Phil
 

banh

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i found building this is very tough for me. SO i bought a car racing game set (including a steering wheel + a few buttons on it)+accelerator and brake pedals. The steering wheel is based on potentiometer.

Besides, the set is not so expensive.
 

Slayerza

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The electronic approach is propably better suited, as there is no mechanical wear or design and the electronic pots have a good lifetime.
 

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