Laslo

Just measured the holes, they're 24mm x 15mm.

Hey guys, I'm wondering if anyone knows a source that sells Polysix style pushbuttons. Visible here http://www.nettilinja.fi/~ahassine/gearland/KorgPolysix.jpg I acquired a polysix case that would be perfect for a midibox and it would be great to have these to complete the look! If i find them i'll post the source here in case anyones interested.

Sorry it's taken me so long to reply, been pretty hectic these past few days. I had a feeling that the isolated bridges underneath the IC's may've come loose, so I completely took the board apart (aside from the resistors and pin headers), replaced the cables and the IC sockets and tried again. This time I occasionally get some buttons working then they jitter. On the first button of the first bundle I get jitter on notes C4 and C5 on channels 1-16. I don't think my multimeter has a beeper setting but it may have some setting that will assist me. I'll keep investigating. Thanks! EDIT: I was re-reading the DIN page and noticed on the description for the J2 port, it read Right now I have the buttons connected in the same fashion on both DINs with a 1:1 connection from DIN no.1 J2 to DIN no.2 J1. Is this all how its meant to be? Thanks again.

Sorry i didnt reply last night stryd, hectic amount of work. I wasn't sure exactly what you meant, so i tested the voltage on the second DIN with my multimeter from VS on J1 to VS on J2, SI on J1 to SI on J2 etc etc. I didn't get a reading on any of them, same with the first DIN though. I may just take it apart and check the wire connections underneath the IC sockets, one of them may've come loose but i don't know how. I'll report back!

Thanks Stryd, I'm about to go to bed, i've got an early uni start tomorrow, but I will give it a shot and report back tomorrow evening!

Thanks for the reply stryd, I gave that a shot, but then they both wouldn't work. One thing i've noticed but didn't think would have an impact on anything is that on the first DIN, i've soldered the resistors all facing the same direction, however on the second DIN, theres a few odd ones out that face in the opposite direction, opposite according to their stripes that is.

Hi guys. Been wrestling with a problem for quite some time now, my first DIN is working perfectly, all 32 buttons, the problem lies in the second DIN connected @ J2. The problem being that its not sending any signals whatsoever, I'm fairly sure the IC's are fine as i've tried each of them in the first DIN with success. The voltages on J2 of the first DIN are the same as that on J1 of the second DIN and I have been over it quite a few times looking for bad solder joints. Wondering if anyone could shed some light on this problem? I'm so close to finishing it! Thanks very much guys.

Right, back in business. It was infact a dodgy 4051 that was the root of the problem, so i'll have to pick up another. Thanks for all the help Pay_C

Arg! Well, while trying to fix that problem, the LCD stopped working for some unknown reason, no black bars, just the back light, so while trying to fix that (resoldering), now nothing works, not signals out of the core. :( So it'll be a while to fix this then i shall try yet again

Sorry it has taken me so long to reply, i've been repainting my room so my internet was down. I measured the voltage as you mentioned and didnt find any irregularities. I may try swapping one of the multiplexers with that bundle to see if that isolates the problem. I shall report back :)

Hi Pay_c When measuring between the outer pins, all pots give 5.1vv, when measuring between the middle and outer pins, as i turn the pot, the voltage goes from 0v to 5.14v. All except the last pot in the bundle which connects to the AIN ground and 5v pins which measures from 0v to 2v. Though this seems to be the same across all pots and it is only this bundle that is affected. I replaced that one pot that went from 127 straight to 60 and that has solved that problem, but still, none in the bundle go lower than 30

Still haven't isolated any issue yet. I might try replacing the one pot that goes straight from 127 to 60 and see if that makes any difference. any other suggestions would still be greatly appreciated

I've checked all pots in that bundle and they're all the same as the others, linear "B" 10k. I'll check the resistance now pay_c, thanks :)

Thanks for your response HL, i'll have to unmount them to see whether they're A or B type, I know they're 'supposed' to all be B type but you never know if they've sent me a wrong one here and there. These are alpha pots too. It seems a bit strange that all the pots in the one bundle would be "A", but could one log pot be influencing the rest in the chain? Thanks again!

alo again. Well i've got my pots all hooked up and it's a great feeling :) Though one little problem is on one bank of 8, the minimum value only goes down to either 29 or 30, even when the sysex created in vmidibox64 is made to be 0-127. Also the second pot in the bundle goes straight from 127 down to 60 with any movement then gradually down to 30 over the pot turn. I've triple checked the solder joints but of course i will check more, just curious to see if anyone has run into this problem or knows a solution? Thanks :)