I bought a 5k potentiometer that is unusual in that it rotates 360 degrees continuously.
I hooked this up to an atmega32 adc port and it reads the voltage. It works as expected except that it shows 1023(max 10. Bit value) over a 20-30 degree range. I hooked it up to a voltmeter to find out why but the pot is in fact continuous from 0 ohm to 5 kOhm seperated by a small notch that shows open line.
I expected half position which has 2.5kOhm to show half voltage and provide the value 511.
Can anyone think of a reason why there is this unresponsive zone and why this pushes position away from where you would expect them?
I hooked this up to an atmega32 adc port and it reads the voltage. It works as expected except that it shows 1023(max 10. Bit value) over a 20-30 degree range. I hooked it up to a voltmeter to find out why but the pot is in fact continuous from 0 ohm to 5 kOhm seperated by a small notch that shows open line.
I expected half position which has 2.5kOhm to show half voltage and provide the value 511.
Can anyone think of a reason why there is this unresponsive zone and why this pushes position away from where you would expect them?