Help sourcing encoder

[jheatac]

Hello,

I have a volume encoder that I cannot seem to find. It is in a Monster branded MP3 player, however I only have the board, not the whole unit, so I don't know the model.

The only marking is on the back. I will take a picture in the next post.

Vertical, PCB Mounted with panel nut (not used in this application), Mechanical, 20 PPR, w/ momentary push button. knurled shaft - I believe would be 6mm, 25mm long (this seems uncommon)

3 terminals are 2.5mm apart
2 terminals are 5mm apart
2 mounting holes in PCB look to be 11mm centers or 11.75mm outside to outside
terminal rows are 14.8mm apart (2 on one side, 3 on other)

11.7mm wide x 13.8 long x 7.2mm tall not counting panel mount or shaft.

My measurements may be just a little off because I don't have a set of metric calipers. I'm converting thousanths to mm with a calculator.

Thank you for your help

[jheatac]

Here are pictures

Sent from my SM-G920V using Tapatalk

[saike]

Did you remove it with a hammer or an axe? 

The link is to a gray encoder but it looks as though it may be from the same family?
http://uk.farnell.com/bi-technologies-tt-electronics/en11-hsm1aq20/incremental-encoder-100rpm-5vdc/dp/2787193

[jheatac]

Did you remove it with a hammer or an axe? 

I

The knob broke off which is why it is being replaced.

The desoldering iron wouldn't free the pins. I cut the 5 connectors and wiggled the mounting tabs out, then I heated and pulled the pins individually.

I then took it apart to count the number of tabs on the wheel.

Thanks for the reply.

I have found several bases that would fit up, but the shaft isn't long enough. I will check it out. Thanks!

[saike]

My quip about the hammer was a very poor attempt at humour,  which now I look at it again seems like an aspersion on your component removal skills which it definitely wasn't.

I just thought about it a bit and surely a 2 bit gray encoder must have the same output as an incremental encoder?
So maybe the device in the link is the same one as the original.

[jheatac]

My quip about the hammer was a very poor attempt at humour,  which now I look at it again seems like an aspersion on your component removal skills which it definitely wasn't.

I just thought about it a bit and surely a 2 bit gray encoder must have the same output as an incremental encoder?
So maybe the device in the link is the same one as the original.

I took no offense. Your assessment based on the pictures were pretty well spot on!

I am very much a newbie at electronics. It looks to me that a mechanical encoder has the pulses split evenly at 50% of the cycle. A gray encoder looks like the cycles are slightly offset. Is that the difference?

[saike]

I am very much a newbie at electronics. It looks to me that a mechanical encoder has the pulses split evenly at 50% of the cycle. A gray encoder looks like the cycles are slightly offset. Is that the difference?

It looks like that to me from looking at the data sheet. It should still work ok whatever the original item is.