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I am developing a electronic throttle control system for FSAE, and by rules of FSAE, I need to have 2 or more potentiometers to measure the position of my pedal. I've decided to use a rotary pot both ends of the pedal, but I am having trouble finding a 3rd potentiometer to use.

Is there any other sensors that can be used to measure angle position that would fit on(or in!) a metal axle? The issue I have is both ends of the axle are already being used by the 2 rotary pots.

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  • \$\begingroup\$ My apologies for not putting volume: 0.5 inch diameter cylinder x 4 inch long would be a good approximation. \$\endgroup\$ – Adam Jun 2 '15 at 17:46
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You have not provided any volume information but that comes downto specific part choice. One technology to look into is a Rotary Variable Differential Transformer (RVDT) the angular equivalent of an LVDT

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if you need binary precision (true/false) hall effect sensors with some magnets would be great. To get more precision you can try texas instruments inductance-to-digital converters. To use it you only need some metal with decreasing thickness with distance.

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