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  #1  
Old 09-29-2011, 02:45 PM
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Default UMR2 Design Discussion

UPDATE, JUNE 2012: The UMR2 is now available for purchase at the HL store.

Original post follows:

As some of you may have noticed, the UMR sold out this summer and has been on backorder for some time.

Rather than restock the product in its original form, I have decided to redesign it to make what I think will be a far superior product. Here are the design goals for the "UMR2":
  • SMT factory assembly with minimal, if any, price increase over the old "kit" version.
  • Smaller footprint as result of above
  • Both MIDI In and MIDI Out (use your old synth either as a sound module or as a MIDI controller)
  • Easy setup without the use of DIP switches
  • Support for a larger number of host keyboards, thanks to better design & a faster microcontroller. For example, I plan to support the Yamaha CS01 without any "special" firmware--unlike the original UMR & separate CS01-MIDI kit.

My plan is to be as open as possible with the design progress. I'll put updates in this thread.

My next post will be an image of the rough circuit board design.

Last edited by John; 06-13-2012 at 05:48 PM.
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  #2  
Old 09-30-2011, 06:19 PM
HartBeat HartBeat is offline
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Default MIDI Sync

Are there any plans to include a midi-sync for keyboard accompaniment rhythms?
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  #3  
Old 10-03-2011, 02:04 PM
Ernani Cioffi Ernani Cioffi is offline
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Default News...

We need news, please...
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  #4  
Old 10-04-2011, 03:39 PM
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Still working on PCB rev A. At the moment, here are the specs, subject to change:

- Dimensions: 2.2" x 1.5" (small!)
- supports up to 12 select lines & 8 data lines
- MIDI in, out
- on-board STBY/ACT LED with terminals for remote LEDs
- PRGM & MODE switch inputs (to be explained later)

Will post a picture of the finished design, once I have it.
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  #5  
Old 10-07-2011, 08:34 PM
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Here's what the PCB layout looks like--this is an export from Eagle CAD. I should have the prototype board at the end of next week for some preliminary testing.

Dimensions are 2.2" x 1.5". The PRGM and MODE terminals are for switch input. The STBY & ACT terminals are LED outputs for optional remote LEDs. There will also be on-board indicator LEDs.

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  #6  
Old 10-10-2011, 04:32 PM
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Quote:
Originally Posted by HartBeat View Post
Are there any plans to include a midi-sync for keyboard accompaniment rhythms?
This is tough, because the rhythm sync isn't something that can be done through the keyswitch matrix.

That said, if you have a keyboard model where you know how to control the accompaniment using a logic signal, if you can spec the signal for me, I may be able to supply it from one of the UMR terminals. Something to discuss for a firmware update after the product is released.
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  #7  
Old 10-14-2011, 12:28 AM
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Proto circuit boards arrived a day early:

http://staskevich.tumblr.com/post/11414407718

Will assemble & begin testing tomorrow.
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  #8  
Old 10-17-2011, 02:58 PM
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Well, got the PCBs early, but UPS managed to send the components all the way across the country in the wrong direction, so they're going to arrive almost a week late. More info in a week or so.
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  #9  
Old 10-26-2011, 04:40 PM
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Initial tests show that the UMR2 works well with the Yamaha PSS-470. This was a keyboard that the original UMR did not support. I'm gaining confidence that the other keyboards on the "unsupported" list of the original UMR will now work, too.

At the moment I'm working on the "learning" algorithm that allows the UMR2 to communicate with the host. The simplicity of installation is going to be a really nice improvement, IMO. Once I validate the functionality I will order another prototype board with a few revisions. Soon after that, production should begin.

More soon.
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  #10  
Old 10-27-2011, 12:17 PM
royal_raver royal_raver is offline
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you the man john. looking forward to this ALOT.
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  #11  
Old 11-07-2011, 05:58 PM
Ernani Cioffi Ernani Cioffi is offline
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Default News

More news, please...
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  #12  
Old 11-08-2011, 03:16 PM
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The revised prototype boards have been ordered. Will update when they're tested.

This should be the final revision.
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  #13  
Old 11-15-2011, 08:42 PM
aldegra aldegra is offline
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Default very excite

hell yes. i'm very ready to for another one of these. thanks, john.
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  #14  
Old 11-25-2011, 08:42 AM
Ernani Cioffi Ernani Cioffi is offline
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Default Ready?

- Ready?
- No.
- Ready?
- No.
- Ready?
- No.

.
.
.
.

- And now, ready?
- NOOOOOO!!!!!

.
.
.

- And now? Ready?
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  #15  
Old 11-28-2011, 07:53 PM
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Getting closer.

http://staskevich.tumblr.com/post/13...dy-for-testing



The pin headers are there for testing purposes and will not be included in the production version. (But they can be added by the user, if desired.)
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  #16  
Old 12-02-2011, 07:29 AM
nielow nielow is offline
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Looking forward to the UMR2 to test it in a CT-410V (where the original UMR didn't work).

Can I place a preorder?
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  #17  
Old 12-11-2011, 08:46 PM
campbell campbell is offline
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can't wait! my VSS-30 needs one of these beauties
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  #18  
Old 12-26-2011, 03:55 PM
am4d am4d is offline
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Default Update?

Hi John,
Really looking forward to this. Anything new to report?

I'm hoping this will be compatible with my Casio VL-1, Casio SK-5 and Casio SK-1.
Looks awesomely superior to the first UMR.
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  #19  
Old 12-29-2011, 06:04 PM
Raymond Siminas Raymond Siminas is offline
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Question Will the UMR2 support the PAIA 1550/1551 Stringz n' Things

I found your site while searching for midi retrofits for digitally scanned keyboards. I have a fully functional PAIA Stringz n' Thingz string synth that I will be overhauling this spring and would like to know if the UMR2 might support it. I would have ordered the UMR, but it is currently not available. If the UMR2 will not support it, are you aware of anything else that will? I would like to add the paia to my growing system of well over a dozen synths. Thanks
Ray Siminas
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  #20  
Old 12-29-2011, 07:21 PM
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Hi All,

I will post more info as soon as the production PCBs have been ordered.

Nielow, no preorders at this time, sorry.

Quote:
Originally Posted by Raymond Siminas View Post
I found your site while searching for midi retrofits for digitally scanned keyboards. I have a fully functional PAIA Stringz n' Thingz string synth that I will be overhauling this spring and would like to know if the UMR2 might support it. I would have ordered the UMR, but it is currently not available. If the UMR2 will not support it, are you aware of anything else that will? I would like to add the paia to my growing system of well over a dozen synths. Thanks
Ray Siminas
Hi Ray, welcome.

If you can post a schematic of the keyboard for the Stringz n' Thingz we can guess at whether or not it's a good match for the UMR2. (If you do, please start a new thread.)

You might also read this article, which may be helpful:

http://forum.highlyliquid.com/showthread.php?t=1133

John
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