This should be simple

Development Boards Arduino
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But I’m drawing a blank. I have 5V and I need to make a simple circuit to make that adjustable from 0-5V using a pot. Pots seem to have a resistance rating which means at their lowest setting they don’t go to zero. What I need it an adjustable reference for comparison of an analog voltage coming in on an analog pin. What’s the easiest way to do this?

Thanks

2

rrc1962:
But I’m drawing a blank. I have 5V and I need to make a simple circuit to make that adjustable from 0-5V using a pot. Pots seem to have a resistance rating which means at their lowest setting they don’t go to zero. What I need it an adjustable reference for comparison of an analog voltage coming in on an analog pin. What’s the easiest way to do this?

Thanks

Just take another pot. Pots with zero position exist.

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by the way, just disassembled this pot http://www.sparkfun.com/products/9941

seems like 2 ohm resistance at zero position is due to material of patches and pins not due to not having zero zone. If they were made out of copper it will be zero. So may be if you but more pricey one you’ll get what you want.

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Turns out I was just wiring the pot wrong. Got is working now. Thanks.