dreamer Posted January 18, 2016 Report Share Posted January 18, 2016 so the 5V works Still the 12V power circuit still does not give any voltage. I think the "J72 Pin1" Should be connected right? Quote Link to comment Share on other sites More sharing options...
Altitude Posted January 18, 2016 Author Report Share Posted January 18, 2016 (edited) .. Edited January 18, 2016 by Altitude Quote Link to comment Share on other sites More sharing options...
latigid on Posted January 18, 2016 Report Share Posted January 18, 2016 If you didn't find it yet: http://www.midibox.org/dokuwiki/lib/exe/fetch.php?media=mb-6582:mb-6582_base_pcb_r2_color.pdf Will make it much easier to trace the tracks exactly where they need to be. Quote Link to comment Share on other sites More sharing options...
dreamer Posted January 18, 2016 Report Share Posted January 18, 2016 Yes i'm looking at it. It helps alot. But still can't exactly figure out how i get 12V. What i understand is that i should combine the 5V and 9V and then i would get 14V that will be regulated to 12V. But how i must combine those 2 is not completly clear to me. Still i connected the "J72 pin 1" with "J72 pin 2-3" and now i get 8V on the 12V line.. Quote Link to comment Share on other sites More sharing options...
Altitude Posted January 18, 2016 Author Report Share Posted January 18, 2016 (edited) Sorry, I was wrong, you need to jumper the input of the 9V vreg to J72 pin 1. Edited January 18, 2016 by Altitude Quote Link to comment Share on other sites More sharing options...
dreamer Posted January 18, 2016 Report Share Posted January 18, 2016 (edited) Okay but i still need J72 pin 2-3 right otherwise i don't have 9V . Edited January 18, 2016 by dreamer Quote Link to comment Share on other sites More sharing options...
Altitude Posted January 18, 2016 Author Report Share Posted January 18, 2016 (edited) yes, correct sorry. Been a while since I looked at this.. Make sure the 7812 is in V3 Edited January 18, 2016 by Altitude Quote Link to comment Share on other sites More sharing options...
dreamer Posted January 19, 2016 Report Share Posted January 19, 2016 So i finally got the voltages in thanks all for helping. But one strange little thing when i measure the voltages at J4 and combine with GND to see what voltages are running. I see a small increase of voltage in the beginning. Example: I measure the 5V line and the moment i connect this i see a little jump to 8V and then back to 5V. The same with the other voltages. The moment i connect a small increase in voltage and the drops down. Is this expected because of the switching regulators or is there another problem somewhere.?? Grtz Quote Link to comment Share on other sites More sharing options...
Hawkeye Posted January 19, 2016 Report Share Posted January 19, 2016 I'd suspect the switchers are causing the spike, as they are unloaded. You could test-install a load and redo the test (e.g. as proposed, the 1k resistor between 5V and GND) - the voltage spike should not be so big then... pull the resistor, if it gets hot (but unlikely)... Many greets, Peter Quote Link to comment Share on other sites More sharing options...
ChinMuzik Posted December 8, 2016 Report Share Posted December 8, 2016 On 1/1/2016 at 5:07 PM, Altitude said: Yep, that's how I have done it. switching 9V and 5V Recoms and a 7812 for the +12V rail and a 15V DC supply. You could forgo the 7812 and just use a regulated 12VDC brick but that's sort of putting yourself out there and any PSU fault could result in damage to the SIDs. The 7812 would provide protection from overvoltage. Triple check all your voltages before installing any chips The wire in that pic was to power the backlights for the knobs on mine and is not necessary I'm confused... How (or where) could/would both a 9v and 5v recom be installed for a mixed SID setup? Quote Link to comment Share on other sites More sharing options...
Altitude Posted December 8, 2016 Author Report Share Posted December 8, 2016 The MB-6582 needs 2 or 3 power rails. 5V and 9 or 12V for the SIDs (or both in a mixed environment). You always use the 5V recom since it is much more efficient than the 7805 and generates no heat. You could use a 9V one in a mixed SID environment where you have a linear Vreg for the 12V rail (meaning a supply volage of ~ 15VDC), 6V is a lot to burn off as heat.. Quote Link to comment Share on other sites More sharing options...
ChinMuzik Posted December 8, 2016 Report Share Posted December 8, 2016 4 hours ago, Altitude said: The MB-6582 needs 2 or 3 power rails. 5V and 9 or 12V for the SIDs (or both in a mixed environment). You always use the 5V recom since it is much more efficient than the 7805 and generates no heat. You could use a 9V one in a mixed SID environment where you have a linear Vreg for the 12V rail (meaning a supply volage of ~ 15VDC), 6V is a lot to burn off as heat.. Right I get that but as far as space on the pcb for mounting both a 5v and a 9v recom.....im guessing one would need to be mounted on the underside? Quote Link to comment Share on other sites More sharing options...
Altitude Posted December 8, 2016 Author Report Share Posted December 8, 2016 There is plenty of room, the recom is smaller than the TI part in my picture.. Quote Link to comment Share on other sites More sharing options...
ChinMuzik Posted December 9, 2016 Report Share Posted December 9, 2016 Ok thanks for the help. So any 15vdc 1.5a or more adapter will work fine? switching or linear? Quote Link to comment Share on other sites More sharing options...
Altitude Posted December 9, 2016 Author Report Share Posted December 9, 2016 yep. Switching is fine, linear ones tend to get really big 1 Quote Link to comment Share on other sites More sharing options...
jaytee Posted January 18, 2017 Report Share Posted January 18, 2017 Just wired this up this afternoon. Seems to work like a charm! Quote Link to comment Share on other sites More sharing options...
Smithy Posted January 27, 2017 Report Share Posted January 27, 2017 On 18 January 2017 at 0:20 AM, jaytee said: Just wired this up this afternoon. Seems to work like a charm! Is there any chance you or someone else could do a wiring and install guide as the directions in the thread are a bit are a bit confusing? Finally I'll be able to stop using that damn power brick! Quote Link to comment Share on other sites More sharing options...
Altitude Posted January 27, 2017 Author Report Share Posted January 27, 2017 I updated my OP, the pics were on my old domain. Let me know if that isnt clear enough Quote Link to comment Share on other sites More sharing options...
Smithy Posted January 27, 2017 Report Share Posted January 27, 2017 Just now, Altitude said: I updated my OP, the pics were on my old domain. Let me know if that isnt clear enough Thanks man. I think I'll just post a picture of the wiring when im testing on this thread just to be sure and write a noob friendly how to guide. Really appreciate your efforts in improving MIDIbox designs. Quote Link to comment Share on other sites More sharing options...
jaytee Posted January 29, 2017 Report Share Posted January 29, 2017 (edited) Here are photos of my single-supply wiring. basically exactly the same setup as Altitude. I chose slightly different soldering points for the insulated jumpers (combining them with small component-side jumpers) just to keep them out of sight, but they're functionally identical. This is a 9V only solution, with a 7809 installed alongside the Recom 5V regulator from earlier in this thread. Pay attention to jumper locations. To hook up to a power supply, looking at the first photo (component side) connect + to the left-hand 9VAC pad and - to the right-hand 9VAC pad. Edited January 29, 2017 by jaytee Quote Link to comment Share on other sites More sharing options...
ilmenator Posted January 31, 2017 Report Share Posted January 31, 2017 On 29.1.2017 at 7:08 PM, jaytee said: Here are photos of my single-supply wiring. Just because off-site documentation tends to get lost over the years: here are the images. Quote Link to comment Share on other sites More sharing options...
jaytee Posted January 31, 2017 Report Share Posted January 31, 2017 Thank you. I tried uploading as attachments first, but the site was giving me trouble, maybe because I was on mobile. Quote Link to comment Share on other sites More sharing options...
ilmenator Posted January 31, 2017 Report Share Posted January 31, 2017 No, the trouble was that the images were too large. I had to reduce them in size to get them below the maximum file size :-). Quote Link to comment Share on other sites More sharing options...
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