I am looking to create a set of racing simulator pedals, similar to these. I have identified the best potentiometer to use - http://www.betainnovations.com/hardware/downloads/157.pdf. As you can see the maximum range of the meter is 340 degrees. When the pedals are constructed the potentiometer will be attached at the fulcrum and although the meter measures right through from 0 to 340 degrees, when attached in this way it will only be able to measure approximately 90 degrees or whatever the pressing range of the pedal will be - obviously this cannot be too much. However the less range the potentiometer can measure, the less accurate it is going to be. There is a away to extend the range of the pedals by having a series of gears. Am I right in saying: The pedal can be attached to a rod which is attached to a large cog. The large cog is connected to a small cog, which turns the potentiometer and hence, depending on the ratio of the gears can be turned right through 340 degrees when the pedal is only turned 90 degrees. If this is true - what gear ratios do I need taking that the pedal will go from 0 to 90 degrees? Also - do you know where I could by gears like this?! Many thanks, Nick.