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Thread: Rotary Encoders

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    Rotary Encoders

    Does anybody know where I can get some rotary encoders with 7, 8, and 11 positions? I have several boss multi-effect processors that use these but I can't seem to find them anywhere.

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    Supporting Member Jazz P Bass's Avatar
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    First off: what you are looking for is a 'mechanical encoder'.
    There are many suppliers of them but you seem to need a product specific type.
    (physical dimensions, solder pad footprint, .....)

    Have you attempted to contact Boss?
    Product Support department at (323) 890-3740

    https://www.boss.info/us/support/service_repair/

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    Supporting Member The Dude's Avatar
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    I haven't seen 7 & 11 detent rotary encoders. That doesn't mean there aren't any. Sure you counted right? I agree with Jazz. Why not go to the source. Sans that, maybe you can find something here:

    https://www.mouser.com/Passive-Compo...ncoder&FS=True

    Can't help much more without info or pics- shaft size & style, body size, lug style, etc. Time to get out the calipers.

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    Supporting Member Jazz P Bass's Avatar
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    Not to get pedantic but a rotary encoder spins round & round & round.
    Shaft mounted, they are used for speed sensing, positioning, etc.
    Incremental & quadrature are the most common.

    My reasoning for all this is for the OP: if he attempts to 'Google' the item in need.

    A Mechanical Encoder is what he needs.

    Mech_Encoder_25L.pdf

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    "Thermionic Apocalypse" -JT nickb's Avatar
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    Just to add to what Jazz said.

    Mechanical encoders come in two types, incremental and absolute. An incremental encoder generates pulses as you rotate it and there is no relationship between the position of the shaft and the output code. An absolute encoder generates a unique code for each possible shaft position.

    Incremental are much cheaper than absolute and that it what you will find in most pedals. They typically generate 12 pulses per revolution.

    Absolute usually a number of codes ( positions) that are a power of 2 e.g. 4,8,16...

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    Quote Originally Posted by The Dude View Post
    I haven't seen 7 & 11 detent rotary encoders. That doesn't mean there aren't any. Sure you counted right? I agree with Jazz. Why not go to the source. Sans that, maybe you can find something here:

    https://www.mouser.com/Passive-Compo...ncoder&FS=True

    Can't help much more without info or pics- shaft size & style, body size, lug style, etc. Time to get out the calipers.
    I've already contacted Boss and they don't provide service parts for their pedals. I've counted correctly. I've gone through mouser.com and can actually find tons of 12 detent encoders for example, but only one 10 detent encoder. They're all the same footprint that I'm looking for, and here is a picture of one of the working 10's that I can quickly get to. There are several 10s, 11s, and 8s in a few units that I need, along with one 7.

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    Site Janitor tboy's Avatar
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    Quote Originally Posted by stevenrb718 View Post
    ...here is a picture of one of the working 10's that I can quickly get to.
    Did you forget to attach the picture?

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    -tb

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    Master Destroyer nosaj's Avatar
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    Quote Originally Posted by stevenrb718 View Post
    I've already contacted Boss and they don't provide service parts for their pedals. I've counted correctly. I've gone through mouser.com and can actually find tons of 12 detent encoders for example, but only one 10 detent encoder. They're all the same footprint that I'm looking for, and here is a picture of one of the working 10's that I can quickly get to. There are several 10s, 11s, and 8s in a few units that I need, along with one 7.
    What about this one?
    http://smallbear-electronics.mybigco...otary-encoder/
    Here are some others
    http://smallbear-electronics.mybigco....com/encoders/
    FWWIW Small Bear is very trusted.
    Here's more
    https://www.fullcompass.com/searchre...rotary+encoder
    That's all I can find. Call either Company they are great to work with and will go the extra mile if your willing to help.
    nosaj

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    I sure did lol.
    Click image for larger version. 

Name:	20190108_114259.jpg 
Views:	56 
Size:	2.14 MB 
ID:	51852

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    Master Destroyer nosaj's Avatar
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    Quote Originally Posted by stevenrb718 View Post
    I sure did lol.
    Click image for larger version. 

Name:	20190108_114259.jpg 
Views:	56 
Size:	2.14 MB 
ID:	51852
    How about pulling it to see if there are any identifying marks on the bottom?
    Thanks,
    Jason

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    Quote Originally Posted by nosaj View Post
    How about pulling it to see if there are any identifying marks on the bottom?
    Thanks,
    Jason
    I pulled one of the other ones previously and it only had the resistance value and a number which I believe to be the number of detents for it, but that's a guess. I don't see any manufacturer markings and I don't want to tear the encoder apart, but it looks like a typical alpha or alps encoder.

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    Master Destroyer nosaj's Avatar
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    Quote Originally Posted by stevenrb718 View Post
    I pulled one of the other ones previously and it only had the resistance value and a number which I believe to be the number of detents for it, but that's a guess. I don't see any manufacturer markings and I don't want to tear the encoder apart, but it looks like a typical alpha or alps encoder.
    I'd suggest smallbear then the price is cheap enough to try. other wise your SOL as my Dad used to say..
    nosaj

    Can you clarify which exact pedal this is for? I might have an idea that may get us a part number.
    thx

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    Quote Originally Posted by stevenrb718 View Post
    Does anybody know where I can get some rotary encoders with 7, 8, and 11 positions? I have several boss multi-effect processors that use these but I can't seem to find them anywhere.
    Model numbers (of the pedals) please?

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    Last edited by nickb; 01-09-2019 at 08:58 AM.
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    Quote Originally Posted by stevenrb718 View Post
    I pulled one of the other ones previously and it only had the resistance value and a number which I believe to be the number of detents for it, but that's a guess. I don't see any manufacturer markings and I don't want to tear the encoder apart, but it looks like a typical alpha or alps encoder.
    AH! I missed the pic earlier.

    That's a standard incremental encoder. Having just three pins tells us it's incremental. The pulses per revolution is not critical as it's incremental. You can always turn it a complete revolution and count. It's not the same thing as the number of options of the front panel BTW. Try searching for ALPS EC12 series or Bourns PEC11 or PEC12.

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    This could be what you're looking for: http://smallbear-electronics.mybigco...for-oceans-11/

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    Quote Originally Posted by Mark Hammer View Post
    This could be what you're looking for: http://smallbear-electronics.mybigco...for-oceans-11/
    That does fit for a couple that I'm looking for. Unfortunately, they only seem to have 11 detent encoders. I emailed them the other day asking if they have other ones but have yet to receive a response.

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    Lifetime Member Enzo's Avatar
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    Why does the 11 matter?


    Also, encoders are switches inside, they do not have a resistance value.

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    Quote Originally Posted by Enzo View Post
    Why does the 11 matter?


    Also, encoders are switches inside, they do not have a resistance value.
    I think this is the central problem. The OP has been asking for an encoder when what he actually wants is a potentiometer with detents.

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    Lifetime Member Enzo's Avatar
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    I did think of that, the silk screen on his board calls out a VR number, VR meaning Variable Resistor, or pot. In most cases encoders are called out as eight switches, as in S101, or as ENC for encoder.

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    Supporting Member eschertron's Avatar
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    Quote Originally Posted by Enzo View Post
    I did think of that, the silk screen on his board calls out a VR number, VR meaning Variable Resistor, or pot. In most cases encoders are called out as eight switches, as in S101, or as ENC for encoder.
    ..and in this post (#11, above) the OP mentions a resistance marked on the bottom of the component.
    https://music-electronics-forum.com/...l=1#post519440

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    Ok...then anybody know where I can find 7,8, 10, 11, etc detent pots?

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    Supporting Member Jazz P Bass's Avatar
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    Have you attempted to contact Boss?
    Product Support department at (323) 890-3740

    https://www.boss.info/us/support/service_repair/

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