Isaac Marino Bavaresco wrote:
> Em 2/5/2010 17:29, Youda He escreveu:
>   =

>> This is a redesign of existing product, used in dusty environment, for
>> ramping up/down current and voltage setting.
>> The existing design use a roller switch for this (so you don't have to
>> click on up down arrow thousands of times)
>> Very much link the stereo equipment volume dial, the existing roller
>> goes bad easily...
>>
>> I am trying to find a better replacement.
>>
>> -- Youda
>>   =

>>     =

>
> Use the optical quadrature encoder from a mouse, plus a small PIC to
> decode the signal and simulate the original switch.
>
> Isaac
>
> __________________________________________________
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>
>   =

Greyhill make optical ones, Alps mechanical ones, that are sealed. A =

mouse based one does work, but  easily upset by dust and a  lot of work =

mechanically.
 =

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