Question on a part I need

Former Member over 14 years ago

I need a rotating control to adjust some LEDs.

However I would like it to infinitely turn (unlike a potentiometer).

This is the sort of thing you would get as a volume control on an AV amplifier.

Any help on what they are called and links would be great.

R_Phoenix over 14 years ago

I think what you need is an encoder, one that will detect Clock-wise and Counter-Clock-Wise rotation. You use the software to increment or deincrement depending on the direction of rotation. Maybe you can find what your looking for.

http://www.mouser.com/Passive-Components/Encoders/_/N-6g7nx?Keyword=encoder&FS=True
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Former Member over 14 years ago

Sounds like what you need is a rotary encoder.
Try this link:
http://www.newark.com/jsp/search/browse.jsp?N=500003+1003419&Ntk=gensearch_001&Ntt=rotary+encoder&Ntx=mode+matchallpartial http://www.newark.com/jsp/search/results.jsp?N=500003+1003419&Ntk=gensearch_001&Ntt=encoder&Ntx=mode+matchallpartial&isGoback=false&displaytext=&isRedirect=false
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Former Member over 14 years ago

Thats great, thanks.
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Former Member over 14 years ago in reply to Former Member

No problem. Hope you found what you needed.
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tronixstuff over 14 years ago

Here is the Arduino wiki on rotary encoders that you might find interesting - http://www.arduino.cc/playground/Main/RotaryEncoders
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Former Member over 14 years ago

Well I ordered this one here...

http://uk.farnell.com/bourns/pec11-4230f-s0024/incremental-encoder/dp/1703830?whydiditmatch=rel_3&matchedProduct=PEC11-4230F-S0024&Ntt=PEC11-4230F-S0024

Now programming I can do (to a point) but I am new to electronics.

I was expecting it to come with 3 connectors but in fact it has 5 and there seems to be no info on the data sheet on the back 2 so I am not sure how to wire it up.

Any ideas?
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tronixstuff over 14 years ago in reply to Former Member

Looking at page two of the data sheet, the diagrams for PEC11-4xxxF-Sxxxx (i.e. your encoder) do show five pins, the three pins A, B and C are for the encoder data and common. Your encoder also functions a as a normally-open momentary button (i.e. push the shaft in... it can be used as an 'enter' button for example). The other two pins are the contacts for the button. (See the "how to order" diagram on page one).
Cheers,
John
PEC11-4xxxF-Sxxxx
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Former Member over 14 years ago in reply to tronixstuff

I just realised that the diagram on page 2 refers to the part number which now makes a lot more sense.

I just checked the encoder and it does indeed have a push button type operation.

I will have a play tomorrow.

Thanks for your help everyone.
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Former Member over 14 years ago in reply to tronixstuff

Got is working (kind of) using this link...

http://tronixstuff.wordpress.com/2010/06/26/getting-started-with-arduino-%E2%80%93-chapter-eleven/

but I seem to be getting bouncing but delays dont seem to help.

Very odd.
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tronixstuff over 14 years ago in reply to Former Member

To be honest I wasn't all that keen on rotary encoders. I wrote another example in chapter 12 (http://wp.me/pQmjR-zL) but have left them alone since. Another way to combat bouncing is to have the sketch require two movements or value changes instead of one. In other words, the sketch counts two moves but only acts as if they were one.
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