Lin v log pots

[BRASSBITS]

how do I tell the difference between un-marked lin and log volume pots
Mick

[Scimitar]

Put them on a meter and look at the relationship of wiper travel to the indicated resistance.

[BRASSBITS]

what difference would I see on the meter to say if it was a log pot or a lin pot

[Nuvistor]

With a Lin pot the resistance with the control in the centre would have the same reading from centre to either end.
A Log pot would be very different.

http://www.learnabout-electronics.or...istors_09a.php

[m0cemdave]

Measure the pot end-to-end to confirm its overall value. Most pots have very wide tolerances, so don't be surprised if a 10k pot is anywhere between, say, 8k and 12k.

Then set the pot half way up and measure between the slider and one end. A linear pot will measure about half the value, while a log pot will be something like 10 or 15% to the "anticlockwise" end (the one normally connected to earth in an audio circuit).

HTH.

[Diabolical Artificer]

Everything you need to know about pots here - http://www.geofex.com/article_folder...s/potscret.htm and here - http://www.resistorguide.com/potentiometer/

Andy.

[camtechman]

Nuvistor,

Well done & thanks for posting that link. I'm teaching my nephew basic electronics and that will help him.

Cheers

Tony

[Nuvistor]

Hi Tony,
It’s surprising at times just how much information is available and free.

[BRASSBITS]

many thanks for helpful info and links
Mick

[Skywave]

Originally Posted by camtechman

I'm teaching my nephew basic electronics and that will help him.
Tony

In which case - and whilst you're on the topic of pots. - it might be worth mentioning reverse log. pots. (a.k.a. 'anti-log.') If you don't, one day he's bound to ask . . .

Al.