Wilba Posted November 30, 2010 Report Share Posted November 30, 2010 BTW I like the case design too... esp. the nut in the PCB, I'd like to see how that turns out (and then steal the idea) :thumbsup: I've thought about whether it's possible to solder a metal threaded spacer horizontally to a large pad on the PCB (i.e. ground plane without solder mask)... maybe it's also possible to hold a nut in place with a few solder joints. Quote Link to comment Share on other sites More sharing options...
Sasha Posted November 30, 2010 Report Share Posted November 30, 2010 (edited) Nice work, Sasha... I like the changes :thumbsup: Thanks mate. If you want to use the "C64" rocker switch (like MB-6582, sammich*, kaffeSEQ), I just ordered 500 and have plenty to spare for any PCB/kit bulk order. That is great. I really like that switch. One part sourcing problem is solved. Do you have some extra x0xb0x/MBseq style buttons left? :P :D By dropping the gap to 10mm, you now need to worry about clearance for the power socket and switch... Hmmm, i totally forgot about those. Thought MIDI sockets and 2200uF capacitor are only thing to worry about. And, I thought this is final revision... BTW kaffeSEQ is mostly nILS' design, please direct all design criticisms to him :poke: I just do all the boring stuff... :wacko: I didn`t see all the kaffeSEQ details, but I really like how it is done. Great work Nils! BTW I like the case design too... esp. the nut in the PCB, I'd like to see how that turns out (and then steal the idea) :thumbsup: Sure, we are all here to steal each other knowledge and experiences. ;) I've thought about whether it's possible to solder a metal threaded spacer horizontally to a large pad on the PCB (i.e. ground plane without solder mask)... maybe it's also possible to hold a nut in place with a few solder joints. My initial idea was to use metal epoxy to glue 5mm female metal spacer to the long vertical spacer that holds 2 PCBs, but I think this is better solution. Meanwhile, I changed this idea, again... Even I really like laser cutting sometimes it is needed to employ other machines or even hands in the worst case. So, instead of using vertical acrylic plates and glued nuts, it is really better to use 3mm aluminum plate and make an M4 thread in it, even I need to make a thread by hand. Edited November 30, 2010 by Sasha Quote Link to comment Share on other sites More sharing options...
Sasha Posted November 30, 2010 Report Share Posted November 30, 2010 By dropping the gap to 10mm, you now need to worry about clearance for the power socket and switch... I`ve found a low profile barrel switch. It is 5.5mm high Datasheet: http://products.cui.com/GetSpecForDigiKey.aspx?MFGNum=PJ-014D Quote Link to comment Share on other sites More sharing options...
strophlex Posted November 30, 2010 Report Share Posted November 30, 2010 (edited) Well, long time has passed since that, we`ll see. I would probably need some help regarding organizing batch of buttons and caps from Digikey or Mouser. I could do the mouser / digikey stuff but swedish taxes would make them more expensive than necessary... Edited November 30, 2010 by strophlex Quote Link to comment Share on other sites More sharing options...
Snoozr Posted December 4, 2010 Report Share Posted December 4, 2010 Dear Santa - pleaze haz SammichMB-808 beneath mai tree next year. I b gud boy! :whistle: Quote Link to comment Share on other sites More sharing options...
Shuriken Posted December 4, 2010 Report Share Posted December 4, 2010 (edited) Only just noticed this topic. I bought pcb for 9090 project about a week ago. With the MB808 in the back of my mind i already thought about looking into a nice sequence solution for it as well. Very cool indeed. Guess i don't have to design something myself :thumbsup: I will be following this with great interest. I would be interested in a bulk order if there is going to be one. Edited December 4, 2010 by Shuriken Quote Link to comment Share on other sites More sharing options...
Sasha Posted December 9, 2010 Report Share Posted December 9, 2010 Just to let you know I trashed my PCB design. :( When I finished everything and just before I sent files for PCB prototyping, i read the thread about possible problems if SC/RC lines are mixed between DIN and DOUT registers, which is exactly the case with my design. Maybe there will be no problem as all the register ICs are pretty close to each other, but I can afford only one prototype set. The PCB is pretty dense so there is no way I could re-route the lines properly. If somebody is willing to help me with matrix I could make new design, but there is no way I route again PCB from scratch with all 14 registers. Sorry guys. Quote Link to comment Share on other sites More sharing options...
Shuriken Posted December 9, 2010 Report Share Posted December 9, 2010 Just to let you know I trashed my PCB design. :( When I finished everything and just before I sent files for PCB prototyping, i read the thread about possible problems if SC/RC lines are mixed between DIN and DOUT registers, which is exactly the case with my design. Maybe there will be no problem as all the register ICs are pretty close to each other, but I can afford only one prototype set. The PCB is pretty dense so there is no way I could re-route the lines properly. If somebody is willing to help me with matrix I could make new design, but there is no way I route again PCB from scratch with all 14 registers. Sorry guys. How can we help, do you have the pcb design online? and what program did you use? Quote Link to comment Share on other sites More sharing options...
nuke Posted December 9, 2010 Report Share Posted December 9, 2010 i read the thread about possible problems if SC/RC lines are mixed between DIN and DOUT registers what exactly is the problem then?...can´t find anything regarding this issues...can you provide a link? cheers, nik Quote Link to comment Share on other sites More sharing options...
Sasha Posted December 10, 2010 Report Share Posted December 10, 2010 How can we help, do you have the pcb design online? and what program did you use? Well, you can help if you know how to configure MB808 firmware to work with BLM, it will free a lot of room on PCB, so I can make new layout and route SC/RC lines properly. I was checking the code of SID, and SEQ app. but to me it looks they are configured completely differently and I cant figure out those virtual registers. On SEQ virtual registers are counted from 17 to 24, but where in the matrix should be connected button 17? I didn`t find any schematic with labels where is physically each virtual register located on the matrix net. In the MBSID, register configuration is done with "16+" which is even more confusing to me if I try to compare it with MBSEQ. Only thing understand from the code is how to enable firmware to use it BLM, but not how to use it. Maybe I`m bit rusted from the years of inactivity or maybe it is just too complicate for non-programmer like myself to figure it out. what exactly is the problem then?...can´t find anything regarding this issues...can you provide a link? cheers, nik Look at the attached picture of my PCB design showing SC line highlighted. This is not how register ICs should be routed. SC/RC lines should go from first SR to last one, and separate for DIN and DOUT, but I find out too late about it. Quote Link to comment Share on other sites More sharing options...
ilmenator Posted December 10, 2010 Report Share Posted December 10, 2010 Why don't you go smd for the shift registers? This will free up a lot of space, and soldering is not really harder at 1,27mm pitch. Quote Link to comment Share on other sites More sharing options...
Sasha Posted December 10, 2010 Report Share Posted December 10, 2010 (edited) Sure, 1.27 is not hard to solder, but still it would make it undesirable to people with less soldering experience. Another reason is doing all the work again. It took me a lot of energy and time until I was completely satisfied. 14 register ICs are too much if it can be done with only 4 or 6. Edited December 10, 2010 by Sasha Quote Link to comment Share on other sites More sharing options...
nuke Posted December 10, 2010 Report Share Posted December 10, 2010 Look at the attached picture of my PCB design showing SC line highlighted. This is not how register ICs should be routed. SC/RC lines should go from first SR to last one, and separate for DIN and DOUT, but I find out too late about it. ...but why could this be a problem...? would be interesting , cause i did a layout myself sometime ago, not really finished, but my prototype worked so long...i didn´t do the "straight"-line stuff either...so is there a link what will explain the issue, what happens when not connecting the "right" way? cheer, nik Quote Link to comment Share on other sites More sharing options...
Sasha Posted December 10, 2010 Report Share Posted December 10, 2010 (edited) ...but why could this be a problem...? would be interesting , cause i did a layout myself sometime ago, not really finished, but my prototype worked so long...i didn´t do the "straight"-line stuff either...so is there a link what will explain the issue, what happens when not connecting the "right" way? cheer, nik we get a more difficult situation once a DIN chain is clocked by the SCLK signal in parallel to the DOUT chain: parallel chains can result into two "ringings" (one from the DOUT, one from the DIN chain - if they have different lengths resp. impedances. The situation will become even more difficult if DIN/DOUT registers are connected to SCLK in mixed order, in this case it can happen that the serial data won't be shifted correctly anymore due to setup/hold time violations caused by unbalanced clocks (with different delays) at SR inputs. This results into the effect that bits could be missed or added in the DIN and/or DOUT chain at random moments and positions (-> flickering LEDs, random button events) - this effect could vanish if you put your finger on the SCLK line (see also next point) I have experienced flickering LEDs in past with other project and it didn`t stop when I add terminators at the end of the chain. A friend of mine had similar problems too, so I get DIN DOUT registers can be problematic sometimes and especially if they are not routed properly. Edited December 10, 2010 by Sasha Quote Link to comment Share on other sites More sharing options...
nuke Posted December 10, 2010 Report Share Posted December 10, 2010 ai...thanks for the link...maybe this could explain my "issue" posted here (which is kind of "minimal") : though i hadn´t any problems with flickering lights or random din-triggers... Quote Link to comment Share on other sites More sharing options...
ilmenator Posted December 10, 2010 Report Share Posted December 10, 2010 Another reason is doing all the work again. It took me a lot of energy and time until I was completely satisfied. 14 register ICs are too much if it can be done with only 4 or 6. Well, I did not mean that YOU should do this, but anyone interested enough in this could. For smd, there is actually plenty of space available. Quote Link to comment Share on other sites More sharing options...
Sasha Posted December 17, 2010 Report Share Posted December 17, 2010 Good news. TK checked my PCB and said situation is "relaxed" so I`m continuing with 1st design. :) There were some changes on the design meanwhile. I left out LED BPM display from the CS PCB, but kept pin connector if somebody still like to add it in integrated designs like TR-9090. There is a DOG LCD on it`s place now. Even I wanted to make it clean and simple it will be really hard to navigate trough all the functions without proper panel labels. Main reason I decided to use DOG LCD, is because of its very small size and low profile. It fits nicely with minor controls rearrangement without cutting the PCB. Even it is not so easily awailable, especially from where I live, i feel that DOG is a way to go for this design. Distance between PCBs are grown back to 20mm, and that is about all for now. I`ll let you know the news. Here is the splash of the arrangement. Quote Link to comment Share on other sites More sharing options...
Shuriken Posted December 19, 2010 Report Share Posted December 19, 2010 Good news. TK checked my PCB and said situation is "relaxed" so I`m continuing with 1st design. :) There were some changes on the design meanwhile. I left out LED BPM display from the CS PCB, but kept pin connector if somebody still like to add it in integrated designs like TR-9090. There is a DOG LCD on it`s place now. Even I wanted to make it clean and simple it will be really hard to navigate trough all the functions without proper panel labels. Main reason I decided to use DOG LCD, is because of its very small size and low profile. It fits nicely with minor controls rearrangement without cutting the PCB. Even it is not so easily awailable, especially from where I live, i feel that DOG is a way to go for this design. Distance between PCBs are grown back to 20mm, and that is about all for now. I`ll let you know the news. Here is the splash of the arrangement. That's good news. TK to the rescue once more.:thumbsup: Quote Link to comment Share on other sites More sharing options...
strophlex Posted December 20, 2010 Report Share Posted December 20, 2010 :flowers: Quote Link to comment Share on other sites More sharing options...
pcbatterij Posted March 22, 2011 Report Share Posted March 22, 2011 Nice to hear Sasha! I am definitely interested in a set of the pcbs if there will be a bulk order. Anyone more than me that would be in for panel and case for 9090 with this sequencer? YES I AM INTERESTED!!!! Quote Link to comment Share on other sites More sharing options...
pcbatterij Posted March 22, 2011 Report Share Posted March 22, 2011 That's good news. TK to the rescue once more.:thumbsup: Great news. Do you already have PCB's available? Kind regards Jef Quote Link to comment Share on other sites More sharing options...
Sasha Posted March 24, 2011 Report Share Posted March 24, 2011 (edited) PCBs are ready for prototyping for quite some time, but I put my money savings and efforts onto 303 style sequencer(stripped x0xb0x)as it seams to have more perspective. Not sure is there enough people interested into drum sequencer to pay itself. But some small prototype series could be done. Edited March 24, 2011 by Sasha Quote Link to comment Share on other sites More sharing options...
strophlex Posted March 25, 2011 Report Share Posted March 25, 2011 I am still in. Quote Link to comment Share on other sites More sharing options...
strophlex Posted March 25, 2011 Report Share Posted March 25, 2011 And I would be happy to do some footwork Quote Link to comment Share on other sites More sharing options...
Sasha Posted March 25, 2011 Report Share Posted March 25, 2011 I am still in. Maybe would be good idea to put some list who is interested. Quote Link to comment Share on other sites More sharing options...
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