flyweight

Ah I seem to have sucses. When I disabled th aout_ng in the config, saved it and turned the midibox off. Then turned it on again, selected - aout-ng and tweaking the calibration voltages gives me output!!!! ITS ALIVE!!! It's to bad that most likely the first dac was fine as well and this does look like a bug. (not sure) I will continue the tests another day. Cheers, F*cking happy Tim

Ok I got a new DAC. the led is lightup. J1 Pin 1, GND J1 Pin 2, + 4.5V [24708.300] Setting AOUT:CS pin to ca. 5V - please measure now! J1 pin3 4.5v [24683.868] Setting AOUT:CS pin to ca. 0V - please measure now! J1 pin 3 0v [24742.891] Setting AOUT:SI pin to ca. 5V - please measure now! J1 pin 4 4.5v [24755.116] Setting AOUT:SI pin to ca. 0V - please measure now! J1 pin 4 0v [24775.452] Setting AOUT:SC pin to ca. 5V - please measure now! J1 pin 5 4.5v [24790.716] Setting AOUT:SC pin to ca. 0V - please measure now! J1 pin 5 0v The cables seem good. A new dac is soldered which I carefully inspected. Now +-12v is connected to j3. On the TL074s +-12v is measured that is pin 4 +12v. In bipolar mode I get about -2.6v on all 8 channels, caliaout 1 max does nothing, neither does changing the calibration voltage on the midibox itself. I am trying to find very hard if I soldered something wrong but that it doesn't seem like that. Anybody any tip what I should do?

Make sure you have the correct encoder type configured in the midibox config file. What do you see on the screen when the issue occurs? If you are in step edit mode and only 1 side works then that could be a hardware issue. http://midibox.org/forums/applications/core/interface/file/attachment.php?id=8731 Maybe the schematic can help you as well.

Thanks a lot for your help! I bought my DAC from ebay and to be honest I am now buying it from mouser so I have more trust in it. I will report back here in a while. Cheers Tim

Ok thanks, the LED was wrongly soldered. The led is now working when connected the board without DAC. The DAC did not survive :( I will get a new one. And will report back here. thanks for your help Cheers Tim

Ohhh no I removed the DAC yesterday but looking back to my notes I actually had 5v on pin 5 on the dac (/PRE ). I just learned that the flatside of the led symbol means Cathode, which is the - So there is a high change that I have the LED connected wrongly. I mean 5v on the /PRE input should light up the LED right? Would wrongly placing the led mean a non working aout? If the led is wrong I will re solder the old DAC first otherwise I will bet on a new one.

Hi Slo, Thanks for the help. From the AOUT documentation: http://www.midibox.org/dokuwiki/aout_ng "You can leave out the TL074s for a first test. Then connect J1 to the core. Power up your Midibox. If the LED doesn't light up, IMMEDIATELY switch off power and re-check all connections and soldering." "If the LED is on, you can now connect analog power (+/- 12V) to J3." So I expected the led to power up, but it doesn't I ran the tests and get: Pin 1 VS, 2, VD CS test J1 pin 3 high SI test J1 pin 4 high SC test J1 pin 5 high So the wiring seems good. Cheers Tim

Hmmm hope I did not burn anything. I rewired J1 and ran the test from MIOS studio, Now I have CS test J1 pin 3 high SI test J1 pin 4 high SC test J1 pin 5 high But no led flashes

Testing not on the DAC but on j1. I also learned that you have to set the pin low manually after a test otherwise it stays hight. - testaoutpin cs 1 sets J1(4) SI high -testaoutpin sc 1 sets J1(3) CS -testaoutpin si 1 sets (J15) SC high

Hi Guys, I am finaly near the end of my build of a seq4. Only need to have the Aout_ng and possible the D-out working. The D-out I will try to build on a breadboard for some extra gates and clocks. Realy looking forward for the awesomeness of controlling a modular with the midibox. Thanks again TK for bringing the AWESOME project to the public. Would you have any idea what can be the issue here with my aout_ng? Does anything below indicate wrong wiring? MBSEQ_GC.V4: "CV_AOUT_Type" and set it to 3 for AOUT_NG And on the CV Configuration Page the aout_ng is set. Core STM32F4 AOUT_NG on j19 Connected like J1:1 -> J19:Vs J1:2 -> J19:Vd J1:3 -> J19:RC1 J1:4 -> J19:SO J1:5 -> J19:SC At least I hope. No led is enabled on the Aout after booting the midibox and the DAC is not getting warm. I have only J1-j19 connected so no 12-/+ V on J3 On pin 20 on the TL5630 I got 4.5V on pin 11 as well -Aout not set in the config 4.5v on pin5, 20, 23 and 11 of the dac -Aout set in the config 4.5v on pin2, 5, 20, 23, 11 of the dac [6016.659] Setting AOUT:CS pin to ca. 5V - please measure now! 4.5v on pin2, 3, 4, 5 of the dac [6016.659] Setting AOUT:CI pin to ca. 5V - please measure now! 4.5v on pin2, 3, 4, 5 of the dac [6476.996] Setting AOUT:SC pin to ca. 5V - please measure now! 4.5v on pin2,3,4,5 of the dac Does anybody has a hint what I should check? Thanks in advance, Cheers Tim

Hi Justin, Yes Me too, I have a simple ponoko wooden case. And I would prefer an angled panel indeed.

Hi Guys, I am looking to buy a mbhp_midi_io (http://www.ucapps.de/mbhp_midi_io.html) On modularaddict.com or smash tv they are not available. Does anybody know where to get one or has 1 for sale? Preferably in europe ? Cheers, Tim

Both thanks a lot for your help. Cheers Tim

Thanks a lot, I think what I will have todo. Great idea to also put the +/-12V connections there. Probably I will juts make a eurorack panel with all 32 Dout, 8 cv outs and the +/-12V going to the MidiBox. Cheers, Tim

Hi All, I have a question regarding the Dsub 25 output connector that I would like to use without the transmitter PCB, but with a Aout-ng and D-out. Do I need to use a seperate ground for every output or can these be shared in some case? I mean is the max 12 outputs total; using 24 wires or can i get more my sharing the ground? Thanks, Cheers Tim

Wow Awesome indeed!

In the process I managed to destroy one programmer and 2 pics. ( by trying to apply 13.5v on the pic ) 3 other pics that had dataprotect enabled I could easily recover by selecting [VDD 5v] and erase the chip. Thanks everyone for your help. Cheers Tim

Whoohoo This noob is so happy, I managed to flash the pics with a pickit 2 clone from ebay (see the picture below). Once I connected the module to j4a 4 lights flashed and in mios is can see the IIC module is detected!!! It is much easier than I thought. Just connect the pic directly to the programmer, no external voltage. (thanks latigid on and Yogi!) 1. Connect the Pickit 2 clone to the chip icsp header 16F88 pin 1 vpp 4 2 vdd 14 3 GND/vss 5 4 PGD/DAT 13 5 PGC/CLK 12 6 Aux / NC 2. In the Pickit2 software: Select [Device Family], [Midrange], [Standard] 3. Your device should be detected. ( If not its either broken or the conenctions are wrong ) 4. Open the hex file and select [Write] after that [Verify] 5. Just to be sure I restarted the Pickit2 software and selected [Read] again. If all went well and you used (mbhp_iic_midi_v1_0c.zip) you should see the same as on the screenshot.

Hi ilmenator, I did not resolve it yet but I am giving it another go. Cheers, Tim

@WilHelm* thanks for checking! So only with a hammer that will work :)

Do you mean this 2 fins in the middle of the bottom rear plate ? Ah too bad! Yes cannot see how MIDI i/o will fit there.

Hi Guys, What about using the moog eurorack case with a nice frontplate ? Moog Eurorack Case 104 HP 17" or Moog Eurorack Case 60 HP 12" I am thinking to use the Moog Eurorack Case 104 HP 17" and create a panel with some connections on the frontpanel. Like 8x CV out, gates + clocks. But the midi I/o, usb and power should be coming out of the back. The 84HP small one is 99 € and the 104HP is 119 €, I am not entirely sure if its a fit for the seq v4. But if it fits I would look great with julianf's Panel. What do you guys think? Cheers TIm

Hi Julian, I would also be interested in a case for a midi box seq 4 and possibly another one withouth a front panel for a diy synth. Cheers, Tim

Ok I will measure vdd and if needed I will calibrate vdd in the picket2 software Cheers Tim