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Thread: RPi and rotary encoder - tips?

  1. #1
    Join Date: Dec 2014

    Location: UK, East Midlands

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    I'm Mike.

    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

    Location: W Lothian

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    I'm Grant.

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    Ive heard of them but that's about all. Thought they converted movement or sommat Please explain
    Regards,
    Grant ....

    I've said it before and I'll say it again: democracy simply-doesn't-work
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  3. #3
    Join Date: Jun 2008

    Location: Happy Cheshire

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    I'm Duncan.

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    Iíve run a few Piís 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
    Join Date: Dec 2014

    Location: UK, East Midlands

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    I'm Mike.

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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.

  5. #5
    Join Date: Dec 2014

    Location: UK, East Midlands

    Posts: 1,080
    I'm Mike.

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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

    Location: W Lothian

    Posts: 46,101
    I'm Grant.

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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 ....

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    OPPO BDP-103D DARBEE - JBE SERIES 3/B&O SP1/EMOTIVA XPS1/12V BATTERY - TWIN PRO MONOBLOCK AMPLIFIERS - XIANG SHENG DAC\PRE\HEADPHONE AMP\WE TUBED - TWIN AVANTREE OASIS CLASS 1 BLUETOOTHS - AUDIO TECHNICA ATH-MSR7 & OPPO PM-3 PLANAR HEADPHONES - WIN10 JRIVER24, SPOTIFY - SMSL M6 MINIDAC - RPI/AUDIOPHONICS/VOLUMIO/5V BATTERY - FULL RANGE TWIN TELEFUNKEN/Q ACOUSTIC BT3/CANTON SUB - P.INSPIRED MAINS REGENERATED.

  7. #7
    Join Date: Dec 2014

    Location: UK, East Midlands

    Posts: 1,080
    I'm Mike.

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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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