Why won’t you fit in my case?

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mmelnick
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Why won’t you fit in my case?

Post by mmelnick » Tue Nov 12, 2019 8:16 am

I’ve got a Dave Jones MVIP and want to put it into my case but it doesn’t fit! I need a shrink ray :bang: :bang: :bang:
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Bogus
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Post by Bogus » Tue Nov 12, 2019 10:09 am

It's meant to be eurorack size but doesn't fit?

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Post by NARC NOISE » Tue Nov 12, 2019 10:13 am

Or mmelnick is short 1 or 2 HP of available space.....

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EATyourGUITAR
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Post by EATyourGUITAR » Tue Nov 12, 2019 10:23 am

Go into modulargrid and replace all your modules with 2HP modules. We have a module emergency. :emt: :eurorack:
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Post by Bartelby » Tue Nov 12, 2019 10:35 am

start another rack?

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mother misty
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Post by mother misty » Tue Nov 12, 2019 10:56 am

I think he's talking about the depth of the module, it's 2.56 inches, wouldn't fit in my case either.

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Post by EATyourGUITAR » Tue Nov 12, 2019 12:41 pm

Is it a Pentium 4!?
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Post by Agawell » Tue Nov 12, 2019 2:33 pm

no it's the dave jones video processor module - before dave invented the o'tool - he was (and still is) a guru of video synthesis/synthesizers

it might fit in a doepfer beauty case - depending on power requirements
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mmelnick
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Post by mmelnick » Tue Nov 12, 2019 9:09 pm

I meant depth. It fits in a beauty case yeah, but not in my enclave case. It’s like a 1/16” too fat to fit. I want it in my case so bad! :bang:
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Severed head
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Post by Severed head » Tue Nov 12, 2019 9:28 pm

You could get long screws and drops some washer behind the panel.
Put in one of the corners. And it would t be to evasive no?


I’m not familiar with the case but have done this in a skiff seemed ok
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mmelnick
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Post by mmelnick » Tue Nov 12, 2019 9:32 pm

That would probably work but the slight height difference might freak me out. I might try that thanks
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Post by EATyourGUITAR » Tue Nov 12, 2019 10:42 pm

Image

it should fit but it doesn't. there must be a better way to design this thing. I see a lot of air between the 4 PCB. I also want to point out that Dave Jones is an amazing engineer who has helped me a lot. I am not even close to his level of engineering. however, I bet I could probably cram this thing into a smaller PCB though.
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Post by EATyourGUITAR » Tue Nov 12, 2019 10:47 pm

reminds me of this

Image
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Post by EATyourGUITAR » Tue Nov 12, 2019 10:52 pm

Severed head wrote:You could get long screws and drops some washer behind the panel.
Put in one of the corners. And it would t be to evasive no?


I’m not familiar with the case but have done this in a skiff seemed ok
yes you can! all the sizes of M3 M-F standoff.

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Post by BlinkyLights » Wed Nov 13, 2019 12:22 am

Sounds like it would pair well with a uLFO and am STG Post-Lawsuit filter, both deep.

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Post by cptnal » Wed Nov 13, 2019 3:20 am

EATyourGUITAR wrote:Image

it should fit but it doesn't. there must be a better way to design this thing. I see a lot of air between the 4 PCB. I also want to point out that Dave Jones is an amazing engineer who has helped me a lot. I am not even close to his level of engineering. however, I bet I could probably cram this thing into a smaller PCB though.
You'd think at 6.5mm it would fit in any case. :despair:
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Post by MarcelP » Wed Nov 13, 2019 5:31 am

cptnal wrote:
EATyourGUITAR wrote:Image

it should fit but it doesn't. there must be a better way to design this thing. I see a lot of air between the 4 PCB. I also want to point out that Dave Jones is an amazing engineer who has helped me a lot. I am not even close to his level of engineering. however, I bet I could probably cram this thing into a smaller PCB though.
You'd think at 6.5mm it would fit in any case. :despair:
Only if the case is metric. We might hit this issue in the U.K. when (if) we leave the EU and revert to imperialism (oops - bit political there).

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cptnal
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Post by cptnal » Wed Nov 13, 2019 5:47 am

MarcelP wrote:
cptnal wrote:
EATyourGUITAR wrote:Image

it should fit but it doesn't. there must be a better way to design this thing. I see a lot of air between the 4 PCB. I also want to point out that Dave Jones is an amazing engineer who has helped me a lot. I am not even close to his level of engineering. however, I bet I could probably cram this thing into a smaller PCB though.
You'd think at 6.5mm it would fit in any case. :despair:
Only if the case is metric. We might hit this issue in the U.K. when (if) we leave the EU and revert to imperialism (oops - bit political there).
It's been the cause of more expensive mistakes... :eek:

https://www.wired.com/2010/11/1110mars- ... er-report/
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MarcelP
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Post by MarcelP » Wed Nov 13, 2019 6:36 am

cptnal wrote: It's been the cause of more expensive mistakes... :eek:

https://www.wired.com/2010/11/1110mars- ... er-report/
Such an absurdly simple mistake - I believe the humiliation for NASA led to some major changes that later resulted in some very successful Mars missions. I wasn't aware of this cause of mission failure though:

"The Mars Polar Lander, which launched 23 days after Mars Climate Orbiter, also disappeared on the way to the planet's surface. Vibrations in that craft's legs may have convinced the craft's on-board computer it had already landed, when it was still 100 feet in the air."

The image of a lonely trembling nervous lander 100 feet above the surface of Mars joyfully letting go of its parachutes in mistaken anticipation of a solid sandy surface beneath its feet before plunging to its early and useless death leaves a lump in my throat. I may have watched too much Wallace and Grommit.

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Post by Severed head » Wed Nov 13, 2019 3:18 pm

mmelnick wrote:That would probably work but the slight height difference might freak me out. I might try that thanks
how come?
its stable of you get long enough screw and a good rash washer and snug it a bit extra I traveled with mine that way.
you said it was a 1/16right thats not much more than normal panel maybe if you got any of them other oddballs with thick panels toss it next to it.
maybe if you skiffs metal throw a layer of electricians tape back there.

I had mine bumped up like 3/8's a very noticeable height and gap.
but you stick it in the corner its only one side.
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Re: Why won’t you fit in my case?

Post by daverj » Thu Jan 23, 2020 7:01 pm

I haven't been around much lately, so missed this thread when it was happening.

First, oops... on the metric dimension in that pic. It should have said 6.5cm (65mm).

In that original version the bottom board is there for people who don't have a heavy amount of 5v available in their case (or any 5v at all). If your case has a lot of 5v available then you can remove that bottom board and power it from the board above it.Then it's only 2 inches deep.

With the bottom board in place it uses:

140ma of +12, 140ma of -12

I don't think I ever did a measurement with the bottom board removed, but would guess that it needs 400-500ma of +5v, and maybe 40ma each of +12v and -12v. So to use it with the bottom board removed you need a case that can supply a lot of +5v for it to work.

Or, you could sell that one and buy one of the new ones that just came out. They are functionally the same but don't have that extra board on the bottom, so fit within a 2 inch (51mm) depth.

http://www.jonesvideo.com/prod_mvip.html

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Re: Why won’t you fit in my case?

Post by KSS » Fri Jan 24, 2020 1:23 pm

Alternative might be to simply remove the power header and wire a power cable direct. You -or a trusted solder jockey- could do this and it could even be reversible since one could always revrrse back to the stock power header.

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Re:

Post by moremagic » Fri Jan 24, 2020 3:55 pm

EATyourGUITAR wrote:
Tue Nov 12, 2019 10:42 pm
Image

it should fit but it doesn't. there must be a better way to design this thing. I see a lot of air between the 4 PCB. I also want to point out that Dave Jones is an amazing engineer who has helped me a lot. I am not even close to his level of engineering. however, I bet I could probably cram this thing into a smaller PCB though.
video processing takes a lot of silicon real estate fam, the visual cortex is half as deep and twice as wide, and the densest population i seen on a module board

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Re: Why won’t you fit in my case?

Post by EATyourGUITAR » Fri Jan 24, 2020 4:55 pm

I see a lot air. He could have put the big caps on the other side and chopped 4mm off the standoffs. If we had to design this module today we could just use a blackfin since they are extremely compact, low power, low heat, video processing specific IC. They are $45 for the super awesome latest version. When I say I could make it smaller, I mean I could make it 4mm smaller. If the air gap is there for thermal reasons then it can not be made smaller. I don't have all the information so I'm just estimating that it could smaller. I would not attempt it unless I was on the payroll. I don't have time for that and I really don't want to clone or compete with Dave. Dave deserves all the success he has built. I don't want people to think I am trashing his design. I could not design this module. I can design a PCB though so I tend to comment on PCB design.
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Re: Why won’t you fit in my case?

Post by ersatzplanet » Sat Jan 25, 2020 2:35 pm

Replace the power header with a right-angled one and that could shave a few mm off. If it could fit, you could even mount the right-angled header on the other side of the board and really cut some mm off.

Also you could use some threaded standoffs to mount the panel higher than the front of the cabinet. I know, it leaves a gap that stuff can fall through and is hard for the OCD in some people, but it is the safest for the module itself since nothing is modified.

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