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Thread: RPi and rotary encoder - tips?

  1. #1
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    Default RPi and rotary encoder - tips?

    Anyone have experience using a rotary encoder with their Pi for music purposes and have any hints/tips/remarks about it's effectiveness (as opposed to the software option) and whether any snags were encountered fitting it and/or setting it up?

    I have one on order to fit to my IQaudiO DAC+ card (Pi 2b) ...

  2. #2
    Join Date: Feb 2013

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    Ive heard of them but that's about all. Thought they converted movement or sommat Please explain
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  3. #3
    Join Date: Jun 2008

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    I’ve run a few Pi’s with encoders.

    No issues, work really well especially if you run directly into power amps.
    Better if your dac supports hardware volume control.

    Happy Days

  4. #4
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    Quote Originally Posted by struth View Post
    Ive heard of them but that's about all. Thought they converted movement or sommat Please explain
    From what I understand they are basically a switch arrangement around an axis... at each 'click' during the rotation a pulse is produced which will trigger a response in a particular function (e.g. volume control). So you can set them up to raise the volume when turned clockwise and decrease when anticlockwise, thus mimicking the action of an analogue (but stepped) attentuator.
    Big difference being the switch facility is endless; i.e. they have no 'zero' point as such.

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    Quote Originally Posted by tubehunter View Post
    No issues, work really well especially if you run directly into power amps.
    Better if your dac supports hardware volume control.
    Cool, thanks for that

    I'm assuming the IQaudio DAC supports them as they have dedicated points on the circuit board and I'm using Moode, which has a setting for hardware volume control.

    I want to use the function to control the volume on the RPi I'm using for headphone playback ...

  6. #6
    Join Date: Feb 2013

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    Quote Originally Posted by mikmas View Post
    From what I understand they are basically a switch arrangement around an axis... at each 'click' during the rotation a pulse is produced which will trigger a response in a particular function (e.g. volume control). So you can set them up to raise the volume when turned clockwise and decrease when anticlockwise, thus mimicking the action of an analogue (but stepped) attentuator.
    Big difference being the switch facility is endless; i.e. they have no 'zero' point as such.
    Thanks for explanation. Sounds good for moode
    Regards,
    Grant .... ؠ ......Don't be such a big girl's blouse

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    FIIO K7 BT, M11 PLUS, BTR7, KA5 - OPPO BDP-103D - PANASONIC UB450 - PANASONIC 4K ULTRA HD TV - PIXEL 6 - AVANTREE LR BLUETOOTH - 2* X600 SOUNDCORE - HEADPHONES INCLUDE, FIIO, NURAPHONES', FOCAL, OPPO, BOSE, CAMBRIDGE, BOWER & WILKINS, DEVIALET, MARSHALL, SONY, MITCHELL & JOHNSTON - 2*ZBOOK'S- MERCURY BD ROM, ROON, QOBUZ, TIDAL, PLEX, CYBERLINK, JRIVER - MULTI HDD'S -

    Oh my god! There's nothing wrong with the bidet is there?

    “Nothing discloses real character like the use of power. It is easy for the weak to be gentle. Most people can bear adversity. But if you wish to know what a man really is, give him power. This is the supreme test. It is the glory of Lincoln that, having almost absolute power, he never abused it, except on the side of mercy".

    “You see these dictators on their pedestals, surrounded by the bayonets of their soldiers and the truncheons of their police ... yet in their hearts there is unspoken fear. They are afraid of words and thoughts: words spoken abroad, thoughts stirring at home -- all the more powerful because forbidden -- terrify them. A little mouse of thought appears in the room, and even the mightiest potentates are thrown into panic.”

    "You don't have free will. You have the appearance of free will.”

    “There's a war out there, old friend. A world war. And it's not about who's got the most bullets. It's about who controls the information. What we see and hear, how we work, what we think... it's all about the information!”


    ***SMILE, BE HAPPY***

  7. #7
    Join Date: Dec 2014

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    Well ... the gizmo arrived today, I fitted it this evening and it sort of works.

    By 'sort of' I mean that (sometimes) it does raise or lower the volume when I turn the knob ... but not always in sync with when I turn it ... or consistent with how much it was turned

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