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Topic: Potentiometer is hot! (Read 2348 times) previous topic - next topic

zombiedog

I have a project that uses 4 pots, one of them gets flippin hot!
And I swear I saw some smoke come off of it.
It still works, but I was wondering what might be some causes of this?
And how I can prevent it?
Obviously, this is a bad thing....
~zd~

James C4S

How is it wired?  You probably need to remove it from the circuit and measure if it is still in spec.
Capacitor Expert By Day, Enginerd by night.  ||  Personal Blog: www.baldengineer.com  || Electronics Tutorials for Beginners:  www.addohms.com

zombiedog

Thanks for the reply.
Its wired as per usual, +to+, -to- and pin to pin.
its so weird, because now its not doing it...
I think the + and - lines might have crossed somehow.
would that do it?
~zd~

floresta

It could get really hot if you had the center (the wiper) and the negative end reversed.

Don

MikMo

If the pot gets as hot as you indicate, a lot of current is running through it. This could very well damage your Arduino.

If the other pots are hooked up in the ame way, and do net get hot i would try to replace the one that gets hot with a new one.

floresta

Quote
If the pot gets as hot as you indicate, a lot of current is running through it.

Sort of -  the current is not due to the heat, the heat is due to the current.

Quote
This could very well damage your Arduino
.
Not likely - this large current is not going into or out of the Arduino.

Don

zombiedog

I appreciate the help.
Something must have been crossed...
I cleaned up the sloppy wiring I had, and everything is "Kool and the Gang".
Thanks everyone for the help!

~zd~

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