#I have a problem with finding out correct pins.

34 messages · Page 1 of 1 (latest)

shy glacier
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So I have this slider on hand. It Has 4 pins. From what I read It might have "inputs on both sides" (?).
Either way, I have a problem with identifying the pins.

IMG_20240323_130934.jpg
tiny patrol
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do you have the model number of this slider? or maybe see if somewhere on this slider there should be a model number engraved on it

shy glacier
strong thistle
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if you have or can buy a multi-meter you should be able to verify it

tiny patrol
tiny patrol
shy glacier
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I have one ... somewhere ...
But I really don't know how to check it using it

strong thistle
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it's a good investment as the alternative is frying something

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i believe you set it to ohms and choose 2 pins to test, move the slider

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then change pins until you map everything

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but someone else should be able to explain it better

ebon stump
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Hi guys, I will try to paste an explanation here that I wrote in the past, exactly for this

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I prefer in this instance to explain the methodology for finding out which pins to use, because sliders can look very similar but have different actual pinouts. There's too much variation

So with a multimeter what you can do is test sets of 2 pins (negative on one, positive on the other) - use the "resistance" measuring mode, (Ohm symbol - Ω)

And if applicable you wanna choose a threshold that somewhat matches the resistance of your sliders, so if they're 10K pots use a similar setting (5K or 20K are both fine for example)

Now, with every set of pins you wanna move the slider handle and see if the resistance changes

Once you find the pair for which resistance doesn't change across the two pins, you know that these are your +5v and GND

And then the shared pin that did affect resistance with these other two pins is the "Wiper" or "analog" or "output" pin

I hope this somewhat explains it?

shy glacier
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So now it's multimeter searching time.
I should write my results in a bit

shy glacier
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On the deafult multimeter shows 1

When connecting pins

b&d it shows 0 and doesn't change

a&d and a&b shows 1 but changes when slider moves from center to the left

c&b and c&d shows 1 but changes when slider moves from center to the right

a&c shows 1 and doesn't change

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So now...
What pins are ground, +5V and output...

ebon stump
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It sounds like A is your data/output/wiper pin

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And B and D are your 5V and GND pins

shy glacier
ebon stump
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then in that case, i'm not sure. that doesn't really make sense to me given the behavior you described above

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are you sure you are doing the measurement as in my above message?

shy glacier
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Measurements were done at 20k ohm setting

ebon stump
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what if you try A and C as 5v and GND, and either B or D as wiper pins?

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i think maybe one of your pins is broken, so trying another permutation

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but I'm really unsure

shy glacier
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That I will try next day.
Now I'm happy my two circular potentiometers are working (they are setting volume to max 97%, but I saw a fix somewhere here).
Now It's only this slider and then I'll start working on changing asigned apps by button and in the end getting everything fit into enclosure.

But as I said, I'll try this pins combination next day

ebon stump
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good luck! hope you manage to get it working

shy glacier
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I'll be updating on slider here cuz I don't think that will be end of my adventure with it 😅

ebon stump
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sure. awaiting updates eagerly 😛

shy glacier
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It works great

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Thx!

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I used A as +5V, C as GND and B as wiper pin

ebon stump
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oh awesome. glad to hear!