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Potentiometer %

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Old 04-16-04, 03:46 PM Thread Starter   #1
FireMogle
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Potentiometer %


Does a Potentiometer reach 0% when it is turned all the way down? I am finally finishing up my WC system and need it for the controll circuits. Thanks.

Ps its a Radioshack one with +/- 20% tolerance if that helps.

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Old 04-16-04, 11:26 PM   #2
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Depends. Some potentiometers will go from say 50K Ohms to 0 Ohms whereas others may go from 10K Ohms to 5K Ohms. It should say on the package what it's rated.
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Old 04-17-04, 03:58 AM   #3
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most of the ones from places like radioshak do go to 0 ohms, or damn close at least.

I would recomend ripping them out of old electronics rather than buying them. Just find something with knobs on it. If you ahve a decent assortmant of old junk you can almost always find something in the right range.
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Old 04-17-04, 04:47 PM   #4
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If you don't want to go to 0 ohms you could wire a resistor in series that was the minimum value you wanted.

Measure the resistance with a multimeter if you want to verify what its resistance is at some point.

Ken

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Old 04-18-04, 11:17 PM Thread Starter   #5
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K, thanks guys. I was just planning out my schematics and was wondering what the min R would be, thanks.

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