KIT AVAILABLE !!! All In One PCB Kit to sell !!!

[Synthex]

Here is the new version 2.7 of PCB :

http://www.megadrum.info/forums/viewtopic.php?f=3&t=108&st=0&sk=t&sd=a#p1158

[Cladinshadows]

Oh I see , you can hook it up either way.
Thanks , that answers my question.
I was just wondering because it said that it's the power for the pedal.
Better be safe than sorry , you know?

The new PCB looks good , I see the USB connector changed too.

Hope my board comes in the mail soon.

[Beamtreetaker]

Hi Synthex and others,

I just browsed some online shops for the missing parts.. 'found mostly everything but I'm not 100% sure with some parts:
(see attached file, it includes some links)

list.zip

-In order to find the capacitor values you listed I had to mix three different types of capacitors - does that matter?
-The potentiometer is not meant to be used frequently, so a simple one (with screwdriver-operation) will do it, right?
-Would a 2x20 character display also be okay?
-I found two different kinds of crystals, one of them being much cheaper (see file). Will they work?
-I'm not sure what you mean by those HE-14 and HE-10 connectors. Is that some kind of multi lead cable (like an IDE-harddisk cable)? Could you please try to find some weblinks so I may gather more specifications on them?

Or are there any other mistakes in the list?

Thank you very very much,
beamtree

[Synthex]

-In order to find the capacitor values you listed I had to mix three different types of capacitors - does that matter?

It doesn't matter. You can get electrolytic or tantal for 4.7uF and 1uF and (multilayer) ceramic for others.

-The potentiometer is not meant to be used frequently, so a simple one (with screwdriver-operation) will do it, right?

Yes, of course.

-Would a 2x20 character display also be okay?

Yes, it works, but a 2*16 will be more .. beautiful.

-I found two different kinds of crystals, one of them being much cheaper (see file). Will they work?

HC-49/U series quartz crystal closure works very well.

-I'm not sure what you mean by those HE-14 and HE-10 connectors. Is that some kind of multi lead cable (like an IDE-harddisk cable)? Could you please try to find some weblinks so I may gather more specifications on them?

Yes, they are like IDE-harddisk cable.
HE-14 (2.54mm) :

1-36.jpg

HE-10 (2.54mm) :

2-8.jpg

Or are there any other mistakes in the list?

No, all looks good

[slayer666]

Question to both Synthex and Dmitri.

I have just built synthex all in one version (thanx) and I've connected it to my computer with no problems at all.
I have only a display and 1 piezo conntected.
If I hit very hard I noticed that the mux used sends midi on all 8 channels at once, kinda like an internal overflow in the mux.
I think that it shouldn't be that hard to filter out such occurrances in the firmware.
Did any of you notice the same problem?

Now I'm off to designing a pcb for att input connectors.
I'm thinking of using RCA and stereo 6.3 connectors.

[dmitri]

If I hit very hard I noticed that the mux used sends midi on all 8 channels at once, kinda like an internal overflow in the mux.

It should not be happening. Check soldering, shortcuts, resit mux ICs.

[slayer666]

If I hit very hard I noticed that the mux used sends midi on all 8 channels at once, kinda like an internal overflow in the mux.

It should not be happening. Check soldering, shortcuts, resit mux ICs.

I did all that before I wrote about it.
It responds exactly the same to all muxes exept the mux with hihat channels where only 7ch are affected.

/slayer666

[dmitri]

If I hit very hard I noticed that the mux used sends midi on all 8 channels at once, kinda like an internal overflow in the mux.

It should not be happening. Check soldering, shortcuts, resit mux ICs.

I did all that before I wrote about it.
It responds exactly the same to all muxes exept the mux with hihat channels where only 7ch are affected.

/slayer666

And if you touch pins 1,2,4,5,12,13,14,15 on the muxes with a screwdriver or something metallic, do you see signal only on one channel or on all 8 channels?

[dmitri]

And I'm sorry I won't be able to help tonight much more, I'm off to a wedding:)

[slayer666]

And I'm sorry I won't be able to help tonight much more, I'm off to a wedding:)

I'm in no hurry. I have a wife that wants my attention