strophlex

4.7 V vid 5 V pinnen låter ganska lite tycker jag. Det som kommer ut från 5V på C64-klossen är ju redan kört genom en regulator, så det ska inte gå genom regulatorn på CORE-modulen. Gör det det?

Hi there and welcome! Here is the specific documentation for the MB-6582: http://www.midibox.org/dokuwiki/doku.php?id=wilba_mb_6582 You can build the MB-6582 and only use two SIDs but then you'll have lots of redundant stuff. Anyway, you might come by more SIDs eventually and then you can stuff them in. As for the control surface you can either use the separate MB-6582 control surface PCB or you can make your own. Have a look at that wiki page and it will hopefully become more clear.

The color Natural in the wiki page is that color. Add your number in that column.

:D

What about 12V? Is 12Vac (12*1.4141-1.4=15.5...) enough or will 15Vac be necessary?

And 2A should be enough for the 5V part I am sure. I think this one look grate! https://www.elfa.se/elfa3~se_sv/elfa/init.do?item=56-200-67&toc=18841

What do you think about a 7.5Vac 2A transformer? I don't see a point in wasting more juice to heat than necessary...

I rebuilt the 5V part dead simple and got a little bit higher voltage, but not high enough. And I tested the supply under different loads and conclude that it works up to about .5A. I have to get a higher voltage transformer.

Exactly like this http://www.avishowtech.com/mbhp/ps/ except the 2200uF is 4700uF and the regulator is a 78S05. It is made on stripboard but the ground is not on a straight line but a little bit spread out because of the physical size of the big caps plus + and - 12V that are not connected when I try this out. Is there anything I should keep in mind about the grounding except avoid ground loops when doing this? Are the traces of the stripboard big enough to carry the current? About the +-12V. It is made using the Center Tap Transformer design here http://www.midibox.org/dokuwiki/doku.php?id=bipolar_12v_psu sharing the ground with the 5V part. May that cause the problem in some way?

I used a 6V transformer for another project, but only a core module was driven by the 5V there. It works very well. I will look into the link after dinner... Anyway, when using the 12V configuration of the transformer, the voltage drop is significant too. Why is that?

I am building a PSU for my MB6582 and right now I have problems with the 5Vdc part. I have built a standard PSU circuit transformer -> bridge rectifier -> smoothing capacitors -> regulator -> more capacitors The components used now are: Transformer: Center tap 2x6V 25VA transformer that I intent to run in parallel which gives 6V@4A according to data sheet. Bridge rectifier: B40R, should handle 40V 2A continuously according to data sheet Smoothing caps before regulator: 4700uF 25V + 330nF Regulator: 78S05, should handle 2A according to data sheet Smoothing after regulator: 100uF + 100nF I have tried this out using three transformer configurations: 1) Both taps in paralel, 6V@4A 2) One tap only, 6V@2A 3) Both taps in series, 12V@2A I have measured voltages with the MB6582 turned on and turned off at three positions: - At transformer secondary (ac) - At rectifier output (dc) - At regulator output (dc) The voltages are listed here with a denoting synth turned off and b denoting synth turned on: trafo out rectifier out regulator out 1a) 6.82Vac 8.08Vdc 5.06Vdc 1b) 6.62Vac 6.55Vdc 4.55Vdc 2a) 6.83Vac 8.08Vdc 5.06Vdc 2b) 6.56Vac 6.35Vdc 4.45Vdc 3a) 13.6Vac 17.5Vdc 5.07Vdc 3b) 12.9Vac 14.3Vdc 4.94Vdc The synth comes alive when using the taps in series only and off course, the regulator gets really hot quickly. Does anybody have ideas why the voltages drop so significantly and is it possible to get this thing to supply the MB6582 using the parallel 6V configuration? Thanks

Did you get this working? What components did you use in the end? Cap sizes, transformer power, rectifiers and regulators?

Wellcome

http://www.voti.nl/shop/catalog.html?SW-ROT-01

:thumbsup:

:thumbsup:

You can buy a kit for the base board and the pcb for base and control surface board from smash tv, http://www.avishowtech.com/mbhp/buy.html , but you'll have to source the parts for the control surface. Further information is available here: http://midibox.org/dokuwiki/doku.php?id=wilba_mb_6582&s[]=mb6582

Nice one. Your pictures confirm that two sets of filter boards fit in the size of the PT10... I am using a 1U rack case to fit four sets plus two VCA boards and have a hard time with space...

Even if you raise the case like Digineural you will probobly not fit more than two sets of boards and another problem arises too. The AOUT modules need a balanced power suply of 12V and you will have at most +12V in the machine. That means you'll have to extend your power supply too.

:flowers:

About RGB LEDs. i think krisschneider has a very good point. Is it impossible to do RGB LEDs? I would be sooo nice...

Basicly, yes.

Now that I am browsing around I get kind of confused. Here http://www.ucapps.de/midibox_sid/mbsid_aout_interconnections.pdf it says I should connect J6 of the core module to J1 of the AOUT_NG module but Here http://www.ucapps.de/mbhp_core.html it says J7 "sometimes also used for the MBHP_AOUT or MBHP_AOUT_LC module" and J6 Interface to the AIN module for MIDIbox64 and MIDIbox64E... How am I supposed to connect it? EDIT: It should be connected to J6.

Just to clearify: I build a breakout box for the MB6582 containing - PSU with 5V and bipolar 12V to feed both contents of breakout box and MB6582 - 4 x AOUT_NG - 4 x SSM2044 - 2 x SSM2164

Now I got all AIN_NG and SSMXXXX boards soldered and I think of how to connect the break out box with the MB6582. I will connect J6 of the core modules to J1 of the AOUT_NG modules and one pin of J5 of each core module to J3 of the SSM2044 modules. One thing I am pondering though is if I should use the 5V and gnd connectors of J6. The ground will be the same for both 12/-12 and 5V so connecting both grounds will create a ground loop? Also the +5V for J1 of AOUT_NG could be connected within the breakout box and doesn't have to make the detour to the MB6582 via PSU cable and then back again via expansion port cable, right? EDIT: Changed J7 to J6 not to confuse anyone about to build the same stuff.