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The Projects Forum Working on an electronics project and would like some suggestions, help or critiques? If you would like to comment or assist others with their projects, this is the place to do it.

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Old 02-14-2010, 07:00 PM
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Kraythorne Kraythorne is offline
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Default 12 position switched potentiometer

Hi

I'm looking for a miniature 12 position potentiometer. specifically a 1.1k pot that switches up in 100 Ohm increments between 0 and 1.1k

I've found one from an automotive supplier but it costs over £120! so I'm thinking of building a digital circuit that does the same thing.

If anyone has any advice on how best to go about this, or where to source a cheaper switched pot than the one I've found then it would be much appreciated.

Cheers
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Old 02-14-2010, 07:10 PM
spacewrench spacewrench is offline
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If you're going digital, and what you really want is a rotary control that has "clicks" or detents, I'd guess it'll be a LOT cheaper to use a rotary encoder.

http://www.bitechnologies.com/pdfs/en11.pdf

Hook it up to a digital pot:

http://datasheets.maxim-ic.com/en/ds...60-MAX5468.pdf

and Bob's your uncle!

Last edited by spacewrench; 02-14-2010 at 07:14 PM. Reason: [added digital pot info -- 99 cents from Mouser!]
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Old 02-14-2010, 08:15 PM
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beenthere beenthere is offline
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Try a 12 position rotary switch with 100 ohm resistors soldered between the terminals. The link is for one supplier's choices - http://www.futurlec.com/SwRotary.shtml
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