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For OI and RC analog inputs, use 100 K only, linear taper, as specified in the FIRST Additional Hardware (The Robot, C-1) and the IFI RC manual, page 8, section 8. IFI doesn't mention the taper, but FIRST does.
There are two ways to read pots, one by charging a discharged, known capacitor through the pot, and counting the time it takes to reach a voltage, and you can pass a known current through it and read the voltage with an ADC. Both rely in one way or the other on the pot's resistance being in some known range.
But in your own circuits, use what you like.
Be prepared to buy good quality (eg, cernet type); you don't want the robot going haywire over a cheap one (eg something a large bargain retailer brought in) that wore out.
Last edited by Lloyd Burns : 28-01-2003 at 20:11.
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