Author Topic: Potentiometer with switch  (Read 2035 times)

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Offline king.oslo

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Potentiometer with switch
« on: November 04, 2011, 10:11:06 pm »
Hello there,

I have bought some Bourns multi-turn pots and some knobs. I have noticed that on some devices, when you press what could be a potentiometer, you switch some kind of functionality.

What kind of push button is normally used for this, and where is it placed in the assembly?

Thank you for your time.

Kind regards,
Marius
« Last Edit: November 04, 2011, 10:19:51 pm by king.oslo »
 

Offline sub

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Re: Potentiometer with switch
« Reply #1 on: November 04, 2011, 10:20:04 pm »
I've not seen one on a pot, but rotary encoders often have them built in.  Mounting one separately would probably be overly fiddly.
 

Offline Simon

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Re: Potentiometer with switch
« Reply #2 on: November 04, 2011, 10:22:59 pm »
I think the switch is usually on the back of the pot, sometimes in it's own housing
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Offline FreeThinker

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Re: Potentiometer with switch
« Reply #3 on: November 04, 2011, 10:31:19 pm »
Have a look at these http://www.omeg.com/products.htm#switches
Quite a common item ;)
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Offline hacklordsniper

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Re: Potentiometer with switch
« Reply #4 on: November 04, 2011, 11:10:40 pm »
Alot of devices today have such instaled (example radios) to turn the appliance on with volume pot as example
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Offline king.oslo

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Re: Potentiometer with switch
« Reply #5 on: November 05, 2011, 01:40:00 am »
Yes, is it possible to buy a switch like this for the pots I already have?

Thanks.M
 

Offline david77

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Re: Potentiometer with switch
« Reply #6 on: November 05, 2011, 03:44:47 am »
Pots with a "turn-to-switch-on" switch are standard items and have been for many decades, see the link above or have a look at Piher pots.

So far I have not seen off the shelve pots with the "push-pull" variety of switches like they are often used in scopes.
Also I don't think there is an easy way to get a switch function added to a standard pot, you would have to make up something mechanical to add this feature - seems to be too complicated to be worth doing, IMHO.

 

Offline IanB

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Re: Potentiometer with switch
« Reply #7 on: November 05, 2011, 04:15:05 am »
Yes, is it possible to buy a switch like this for the pots I already have?
I don't think so. You buy the part as a complete assembly, like this for example:

http://www.bourns.com/pdfs/PDB183.pdf
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