[sdiy] Potentiometers and Mounting PCB's

[Stewart Pye]

Well, I guess that's subjective, but normally I want the half way point 
to be at 12 o'clock. With the Blacet modules it is at 9 o'clock . With 
those pots you'd have to use a knob with a separate cap to get the half 
way point at 12 o'clock, unless you could get a knob with the pointer in 
a different position.

I suppose I could put the module on the floor and lay on my left side!

My work van has the turn indicator control on left, whereas most cars 
here (including mine) are on the right, but now whenever I drive a car 
that is not my own I go for the lever on the left whenever I turn, and 
the windscreen wipers go nuts!

Stew.


cheater cheater wrote:
> Stewart, what do you mean by 'in the wrong place'?
>
> D.
>
> On Sun, Feb 28, 2010 at 03:41, Stewart Pye <stewpye at optusnet.com.au> wrote:
>   
>> Hi David,
>>
>> Yes, the 16mm pots should be Ok on their own for small PCB's. The PCB's are
>> double sided so I can solder on the top side to strengthen the joint.
>>
>> A downside for the panasonic pots is that the flat of the D shaft is in the
>> wrong place when the PCB is mounted vertically, and they are not available
>> in a wide range of values (eg: 1M).
>>
>> Regards,
>> Stewart.
>>
>>
>> David Ingebretsen wrote:
>>     
>>> These Panasonic pots are a bit pricey, but they are a solid mount to the
>>> PCB
>>> and panel.
>>>
>>>
>>> http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go&l
>>> ang=en&site=us&keywords=P3R7503-ND%09&x=18&y=14
>>>
>>> They are basically the ones John Blacet uses. I've found the mounting
>>> geometry for the pins is close enough to the Spectrol or BTI pots (like
>>> MOTM
>>> uses) that you could use them in the same holes if you want to.
>>>
>>> For what it's worth, I found that with a small'ish PCB (like the CGS
>>> Steiner
>>> filter), the pots you linked to work fine especially if you have several
>>> of
>>> them on the edge mounting to the panel.
>>>
>>> David
>>>
>>>
>>>
>>> ~~ -----Original Message-----
>>> ~~ From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-
>>> ~~ bounces at dropmix.xs4all.nl] On Behalf Of Stewart Pye
>>> ~~ Sent: Saturday, February 27, 2010 5:09 PM
>>> ~~ To: Synth DIY
>>> ~~ Subject: [sdiy] Potentiometers and Mounting PCB's
>>> ~~ ~~ I've layed out a couple of PCB's over the weekend. They have PCB
>>> mounted
>>> ~~ 16mm pots, like these.. http://www.bitechnologies.com/pdfs/p160.pdf
>>> ~~ I was looking at Mouser, Digikey etc for pots that have a robust
>>> ~~ mounting bracket on them, but all the horizontal mount pots I could
>>> find
>>> ~~ with brackets did not have a threaded bush.
>>> ~~ ~~ I've seen that a common method is to use a "stooge" bracket that
>>> goes
>>> ~~ between the panel and the pots and folds around to the side. I guess if
>>> ~~ I can't find suitable pots I'll do this. Does anyone know of pots that
>>> ~~ are available that would obviate the need for the bracket?
>>> ~~ ~~ Regards,
>>> ~~ Stewart.
>>> ~~ _______________________________________________
>>> ~~ Synth-diy mailing list
>>> ~~ Synth-diy at dropmix.xs4all.nl
>>> ~~ http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>>
>>>
>>>
>>>       
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>
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