strophlex

Allt är lite retro med MidiBox Grattis för bränningen! :thumbsup:

I used the drum PCB from something like this to make this -> (sorry all attachments seem to be lost)

The high capacitance capacitors might be a little hard to find in ceramic type, I guess foil caps are OK as long as they fit the footprint of the PCB?

There is nothing special about the ceramic capacitors on the VCA-board, right?

:sleep: post count 333!

Good! My SSM2044 are starting to get bored...

Hi! J2 is not a jumper. It is a connector for a) suppling other devices with 5V dc or b) supplying the core module with 5V dc from another source when the PSU part of the module is not used. When you put jumper there you make a short cirquet and that's why your regulator gets hot. Remove the jumper and let's hope your regulator is OK. I did somthing similar once and it didn't brake the regulator. Good luck!

Congratulations for the 1000 posts!

I'd prefer a monomeish solution with rubber buttons. To size it like the sequencer LCDs sounds like a good idea.

I didn't have time to test until now and I installed beta 21 before trying this out more. Now it works. Thanks!!!

You are soldering them by hand yourself!? Hope there were not too many ordered ;) Thanks for the update.

Hi! How's it going?

I am on Mac. Will check this in a few days. Thanks!

Was this solved? Have this issue too...

Good to know.

And I have a spare board (but no chip) to give away for the shipping price.

Payed! Really nice to get this going!

Here are a few pics of my 1U case mount. I guess it is self explaining. The USB connector is a type A-type B converter. Really nice!

I think you are on the right track. I am not an expert either.

What voltage ratings? 2x6V? Then you could use the one tap for regulated 5v and both for regulated 9v. However, you will need a 6(V)*2(taps)*2(A) = 24 VA transformer. I the beginning of this thread I mentioned a 25VA transformer at mouser. That could be something.

I meassured the current draw of my MB6582 when it was idle and it used allmost exaclty 1A so I'd recommend 1.5A supply to have some headroom. I use a C64 power supply, but plan to build a power supply box (containing VCFs, VCAs and PSU) feeding 12V dc + gnd into the ac input of the MB6582. Are there any objections to this?

If I understand you right, I'd say it's not that easy. But still you can stick with standard values as long as voltage rating of caps and current rating of transformers and regulators are high enough. To make a PSU with several different output voltages you'd normally have a transformere with several taps or several transformers because if you feed a regulator a voltage far above the output allot of heat will be produced. The NorthenLigthsFX PSU remedy this with the voltage dividing resistors (the high power ones) so that only part of the voltage is applisd to the regulator. If you didn't see these before: http://www.avishowtech.com/mbhp/ps/ http://www.midibox.org/dokuwiki/doku.php?id=bipolar_12v_psu

farnell seems to have them. not cheap though