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multi detent 10k potentiometer?

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CJohnston(at)popsound.com
Guest

Posted: Sat Jun 30, 2007 1:53 pm Post subject: multi detent 10k potentiometer?

Ok smart guys...get ready for a dumb guy question!



What do you call a regular old 10k pot that has multiple detents on it?

I'm trying to find a single turn 10k pot that has a click feel, maybe 20

detents or so, to use with a PWM dimming system for an lcd inverter.

But I have no idea what to call it!  so I can't look for it!  I tried

and tried, but all I find is pots with center detents, or pots with a

switch at the end, but that's the only detent.  I'm very frustrated, and

feeling very stupid.  Can someone smarter than me help me out?



Btw, I do know what it's called when you cross a hippopotamus, an

elephant and a rhino.  Hellifiknow!



Sorry.  and thanks.



cj

#40410

www.perfectlygoodairplane.net

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nuckollsr(at)cox.net
Guest

Posted: Sat Jun 30, 2007 2:41 pm Post subject: multi detent 10k potentiometer?

At 02:51 PM 6/30/2007 -0700, you wrote:



 	  Quote: 	
		  

<CJohnston(at)popsound.com>



Ok smart guys...get ready for a dumb guy question!



What do you call a regular old 10k pot that has multiple detents on it?

I'm trying to find a single turn 10k pot that has a click feel, maybe 20

detents or so, to use with a PWM dimming system for an lcd inverter.

But I have no idea what to call it!  so I can't look for it!  I tried

and tried, but all I find is pots with center detents, or pots with a

switch at the end, but that's the only detent.  I'm very frustrated, and

feeling very stupid.  Can someone smarter than me help me out?



Btw, I do know what it's called when you cross a hippopotamus, an

elephant and a rhino.  Hellifiknow!



Sorry.  and thanks.


	


    I've never seen one as a catalog item. I've built

    them by putting a little spring cartridge behind

    the skirt of a knob and cutting the detent furrows

    in the back of the knob. This is going to be kinda

    'big'. With a 1/2" diameter pot, you still need about

    a 1-1/4" diameter knob to build the mechanism behind

    it.



    All the other clicky-feel pots I've seen were

    fabricated by the manufacturer of the appliance.

    Others on the List may be aware of some options.



    Bob . . .

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rjquillin

Joined: 13 May 2007
Posts: 123
Location: KSEE

Posted: Sat Jun 30, 2007 3:43 pm Post subject: multi detent 10k potentiometer?

At 14:51 6/30/2007, you wrote:

 	  Quote: 	
		  What do you call a regular old 10k pot that has multiple detents on it?

I'm trying to find a single turn 10k pot that has a click feel, maybe 20

detents or so, to use with a PWM dimming system for an lcd inverter.

But I have no idea what to call it!  so I can't look for it!  I tried

and tried, but all I find is pots with center detents, or pots with a

switch at the end, but that's the only detent.  I'm very frustrated, and

feeling very stupid.  Can someone smarter than me help me out?


	


It's still just a pot.  But linear or log taper?



Pretty common to find them in "hi-fi" and stereo equipment as balance 

and tone controls in the linear version.  The log version will be 

found as volume controls.  Alps made a ton of them for various 

OEM's.  Generally the back plate, opposite the shaft, will have 

multiple 'bumps' on it.  The detent being on the inside with a small 

spring leaf riding directly or applying pressure to a 'ball bearing'. 

The whole thing has goo to make it feel good and smooth.



Sources...  Humm...



First thing that comes to mind is swap meets, thrift stores and 

garage sales.  Find an old bone yard stereo with detented pot for $10 

or so and hope one's a 10k.  I would think you would have some 

latitude on value, but check with the dimmer supplier or designer to 

make sure a different value is acceptable.  Surplus electronic stores 

may also be a good haunt.  Gateway Electronics I think has an online 

store worth browsing.  I'll dig in my parts bucket at home for you as well.



Ron Q.

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hooverra(at)verizon.net
Guest

Posted: Sat Jun 30, 2007 4:42 pm Post subject: multi detent 10k potentiometer?

Chris,

    Bourns makes them, They are probably special order, this is first 

one I found there may be other series as well. You may be able to get a 

sample if you only need one. No harm asking. They have multiple detent 

configurations, center, 20, 30, end, and none.

    I went to Mouser and typed "detent pot" into their part search and 

came up with a P/N and a link to the cutsheet.

    Good luck.



-- 

Ralph C. Hoover

RV7A 

hooverra at verizon dot net

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bakerocb

Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

Posted: Sun Jul 01, 2007 3:54 am Post subject: multi detent 10k potentiometer?

7/1/2007



Hello cj, I recently drove a Chevrolet Malibu rental car that had a click 

knob rheostat to control the fan speed on the air flow to the car interior. 

The knob itself was probably too large for your use, but you might check 

with the parts section of a local dealer to find out what the insides are.



'OC' Says: "The best investment we can make is the effort to gather and 

understand knowledge."



Time: 02:53:23 PM PST US

Subject: multi detent 10k potentiometer?

From: "Chris Johnston" <CJohnston(at)popsound.com>

Ok smart guys...get ready for a dumb guy question!



What do you call a regular old 10k pot that has multiple detents on it?

I'm trying to find a single turn 10k pot that has a click feel, maybe 20

detents or so, to use with a PWM dimming system for an lcd inverter.

But I have no idea what to call it!  so I can't look for it!  I tried

and tried, but all I find is pots with center detents, or pots with a

switch at the end, but that's the only detent.  I'm very frustrated, and

feeling very stupid.  Can someone smarter than me help me out?



Btw, I do know what it's called when you cross a hippopotamus, an

elephant and a rhino.  Hellifiknow!



Sorry.  and thanks.



cj

#40410

www.perfectlygoodairplane.net

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pilot4pay

Joined: 01 Jan 2007
Posts: 171
Location: Louisville, KY

Posted: Tue Jul 03, 2007 4:59 am Post subject: multi detent 10k potentiometer?

Automotive application fan controls may not be a viable solution. Some use a

wire resistive element with taps remotely positioned in the heater airbox. I

found this out when a mouse decided to build a nest in mine. When the fan

was turned on to a position other than "HIGH" something would start smoking.

After tearing apart he duct work, I found the nest, removed it, then the

side of my arm got burned on the wire element that was exposed inside the

box.

CS



--

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_________________
Craig Smith
CH640 builder
SN: 0078

"Just think how stupid the average person is,
and then realize that half of them are even stupider!"
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