*Build Log* DIY 4 Chennel MIDI Mixer from scratch

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*Build Log* DIY 4 Chennel MIDI Mixer from scratch
Posted on: 26.08.2010 by Mellisa Calenda
After much research I finally ordered the first of my parts for my DIY midi mixer. Here is my parts list so far

DJ Tech tools $61.18
19x DJTT Green Knobs
4x DJTT Green Fader Caps
5x Purple Arcade Buttons

Mouser $47.97
3x 10K ohm Potentiometer
12x Toggle Switch
4x 10K ohm 75mm Slide Potentiometer

Radio Shack
8x LEDs with Panel Mount


Livid
1x Brain
2x 10 Pin Ribbon
1x 16 Pin Ribbon
1x 14 Pin Ribbon

EDIT:
Mouser $17.12 + Shipping
16x Center Detent Potentiometers

All Electronics (THESE DID NOT FIT ) $21.61
16x Center Detent Potentiometers


Its to bad the original website does not have a data sheet for the part, so i am not sure what type of shaft it had (i.e flattened D or serrated etc). From the picture it looks like its flat and plain so I will probably have to file down a side to make it into a flattened D so i can put the Dj tech tools knobs on them with out them slipping everywhere.

I though instead of buttons it would be cool to control filter on and off and PFL on and off with switches like these to give it a kind of home brew look. I would have a dedicated filter section on the top, for each channel, then the eqs then switches for PFL then the faders. And at the bottom to top it all off 5 arcade buttons just for fun. And on the side i will have 3 Knobs for master volume PFL volume and mix/PFL along with a few switches for shift functions. I decided not to put a cross faded because I never used one when I had an analog 4 channel mixer. Also was going to put on encoders for the gains but since this is going to sit in between my xone 1d and 2d I figured i would just use the encoders on them.

I hope to keep my progress posted and hopefully it this will prove helpful for others trying to do the same thing.
Arcelia Siebeneck
19.09.2010
Originally Posted by Nicky H
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Arcelia Siebeneck
19.09.2010
Originally Posted by Nicky H
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Arcelia Siebeneck
19.09.2010
Originally Posted by Nicky H
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Arcelia Siebeneck
19.09.2010
Originally Posted by Nicky H
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Arcelia Siebeneck
19.09.2010
Originally Posted by Nicky H
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Arcelia Siebeneck
19.09.2010
Originally Posted by Nicky H
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Arcelia Siebeneck
19.09.2010
Originally Posted by Nicky H
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Arcelia Siebeneck
19.09.2010
Originally Posted by Nicky H
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Arcelia Siebeneck
19.09.2010
Originally Posted by Nicky H
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Arcelia Siebeneck
19.09.2010
Originally Posted by Nicky H
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Arcelia Siebeneck
19.09.2010
Originally Posted by Nicky H
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Janyce Henningson
19.09.2010
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Arcelia Siebeneck
19.09.2010
Originally Posted by Nicky H
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Janyce Henningson
19.09.2010
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Arcelia Siebeneck
19.09.2010
Originally Posted by eataskdotcom
I did not know this. How much would you estimate a project like mine would have been to get punched? I mean, there are always going to be more projects
I'm just about to get a quote from a South East UK company for a similar enclosure... I'm putting aside around $150 (which includes materials and setup costs)... more details soon (I'm planning a big DIY build with a blog to chart my progress)
Mellisa Calenda
14.09.2010
Originally Posted by waterresistant
Might I ask where you got the metal enclosure? I am building a controller too but can't find a suitable enclosure like yours. My topic:
http://www.djranking s.com/community /showthread.php?t=17487
Here you are, my enclosure measures 14x10x3in but they have a pretty big selection, anyways knock yourself out

http://search.digikey.com/scripts/Dk...22&k=enclosure

And, best of luck on your project.
Kellie Myrum
16.02.2011
wow!! that look hot bra.
Mellisa Calenda
10.02.2011
I don't know if anyone remembers this thread


But this is where that project went. I ran out of money part way through and couldn't complete it. So it has all the external parts but no internals. No brains no wiring, just potentiometers, chassis, knobs, buttons and leds. Read the thread for a full description on parts used.

It is designed basically as a 4 channel mixer with 8 arcade buttons on the bottom for cue point/fx button mashing glory. All the components are panel mounted to a 2/8" thick aluminum face plate. This thing is pretty bomb proof.

I was hoping to find a good home for this project so someone could complete it.

I was believeing $200 for it would reasonable considering that the parts alone cost more then that, not to mention all the labor that has gone into it thus far. If you have any questions please let me know.


Janyce Henningson
22.09.2010
Really ... ouch

I had mine cut about a year ago - still haven't built my controller - thats another story, but I used a comapany online - just googled waterjet and sent off to loads of companies for quotes.

I honestly can't remember who did it though now
Mellisa Calenda
20.09.2010
Yeah i got a quote ($200-$350) and i had a cad file as well.
Arcelia Siebeneck
19.09.2010
Originally Posted by Nicky H
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Janyce Henningson
19.09.2010
Did you get a quote for waterjetting?

I got mine done that way and it only cost me
Arcelia Siebeneck
19.09.2010
Originally Posted by eataskdotcom
I did not know this. How much would you estimate a project like mine would have been to get punched? I mean, there are always going to be more projects
I'm just about to get a quote from a South East UK company for a similar enclosure... I'm putting aside around $150 (which includes materials and setup costs)... more details soon (I'm planning a big DIY build with a blog to chart my progress)
Random X
19.09.2010
Just a follow post in here, looks nice bro... Maybe a solution for me to build my BCR & MIDIfighter in 1 enclosure.
Mellisa Calenda
19.09.2010
I did not know this. How much would you estimate a project like mine would have been to get punched? I mean, there are always going to be more projects
Arcelia Siebeneck
19.09.2010
Bit late to mention this now but CNC work is almost always more expensive than going somewhere that does 'hole punching'. If you're designing an enclosure with lots of circle and square holes then these can usually be hole punched (if they don't have the right sized hole punch then they can use smaller hole punches to 'nibble' the hole to the correct size). It's only if you want unusual shaped holes that you'd need to go the CNC route.
Mellisa Calenda
18.09.2010
After a couple days worth of quality time with the drill press and coping saw i finally got everything cut. I got a couple quotes from the local machine shops on how much it would be to get cnc'd and it was anywhere from $250 to $350 sooo that was not happening. I used a coping saw to put the slits in for the faders, I will clean those up a little with a file before painting. Anyways here are the results. The Jig saw went little astray on me and i'm pretty sad about about the side that got a little messed up but it's not to bad.

Notice on the right side how it comes in just a tad too much.


Putting the holes on the back side that keep the pots from moving around was a real pain.
Mellisa Calenda
14.09.2010
Originally Posted by waterresistant
Might I ask where you got the metal enclosure? I am building a controller too but can't find a suitable enclosure like yours. My topic:
http://www.djranking s.com/community /showthread.php?t=17487
Here you are, my enclosure measures 14x10x3in but they have a pretty big selection, anyways knock yourself out

http://search.digikey.com/scripts/Dk...22&k=enclosure

And, best of luck on your project.
Ivan Filipov
14.09.2010
Might I ask where you got the metal enclosure? I am building a controller too but can't find a suitable enclosure like yours. My topic:
http://www.djranking s.com/community /showthread.php?t=17487
Mellisa Calenda
13.09.2010
So I pretty much have all my external parts for the mixer now, minus 2 arcade buttons. I am going to finish the CAD drawing of the face place and hopefully by tomorrow evening i will have it CNC water jet cut

Here's everything, the center detent alps pots on the right, my enclosure with the tentative layout, you can even see my plate of 1/8" Aluminum i'm going to use for the face plate in the back:


This is everything laid out basically how it is going to be, 8 Arcade buttons on the bottom faders, arcade buttons for PFL and some small black buttons for filter on and off.


Here is the aluminum enclosure i am using, right side up.
Mellisa Calenda
01.09.2010
Filing down a circular shaft evenly would be a total pain. However! Since the European site i found the alps potentiometers at was taking so long to respond I did a bit more browsing at mouser and found they pots i was looking for! and for way cheaper too! Anyways posted link in OP.
Leeanna Ayla
01.09.2010
File the pots down
Brunilda Kora
01.09.2010
Drill out the knobs? (Clutching at straws, now!)
Mellisa Calenda
01.09.2010
Originally Posted by Patch
Just pack out the holes in the pots with some rolled up paper...
I wish it was that simple, the shaft for the pot is too big to fit in the knob.
Brunilda Kora
01.09.2010
Just pack out the holes in the pots with some rolled up paper...
Mellisa Calenda
30.08.2010
Look what i got in the mail today! Unfortunately the knobs do not fit on my potentiometer, i neglected to notice that a 1/4" shaft is actually 6.35mm instead of needed 6mm *sigh* I found a website selling RK09L1220 Rotary pot. 10KBx2CC which is an alps 10K ohm linear duel potentiometer with center indent and flattened D shaft.

http://www.familygate24.com/alps/potentiometer/price/

I had to email them to get a quote on how much it would be. Shipped to the US it would be 39,48 EUR which is about $50. :\ this is quite a bit more then i wanted to spend, but i guess going the cheaper rout got me a bunch of potentiometers i cant use.

Mellisa Calenda
27.08.2010
So I finally found some good panel mounted, center detent potentiometers, I will be posting the link to them in the OP.
Mellisa Calenda
26.08.2010
Originally Posted by theory28
dont you need 5 fader caps, not 4? 4 for each line, and then 1 for the cross :S

sounds interesting!!!
As stated in the bottom of my post i'm not going to have a cross fader, but thanks for the concern
Maisie Marras
26.08.2010
dont you need 5 fader caps, not 4? 4 for each line, and then 1 for the cross :S

sounds interesting!!!
Leeanna Ayla
26.08.2010
Interested in watching this.

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