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istel

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About istel

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    MIDIbox Newbie
  1. istel

    AOUT problem

    Sure. This is correct right: J19:Vs -> AOUT Vs J19:Vd -> AOUT Vd J19:SO -> AOUT SI J19:SC -> AOUT SC J19:RC1 -> AOUT CS I just can't find any mentions of the AOUT and the LPC1769. This is taken from the 016_aout tutorial where it is the STM32 which is being discussed. But as far as i understand it should be the same for the LPC?
  2. istel

    AOUT problem

    Ok, so i just got away from this a little while and came back with fresh eyes. The b11 and b12, b21 and b22 etc are supposed to be connected with jumpers on the male pin headers if i just want unipolar out, right? If i want bipolar i can make the little schematic shown on the AOUT page with a trimmer and some resistors... I am now going to check out if there is any problems on the core, since i get quite irregular results when i turn on the core - for instance the red LED just lit up on channel 1 and yesterday it did on channel two. Doesn't seem like there is any bad connections on the AOU
  3. istel

    AOUT problem

    OK, i doublechecked the connections between core and aout and it seems it is correct. When i turned on the core the first time afterwards, the red led on ch 1 lit up for a few seconds, but when i rebooted the core it didn't do it again. Something isn't right with the connections and i am going through my soldering work on the AOUT now.... hmmm! I also checked all the power supply connections now and they also seem to be good - ie. +/- 12v for the tl074 and 2.048 for the max525 (i measured 2.050, should be ok, yeah?)
  4. istel

    AOUT problem

    I am actually running the 016_aout tutorial, but maybe i should try out this example you're giving here.. I have connected the J19 like this: J19:Vs -> AOUT Vs J19:Vd -> AOUT Vd J19:SO -> AOUT SI J19:SC -> AOUT SC J19:RC1 -> AOUT CS That should be correct, right? It is taken from the readme in the 016_aout tutorial. I'll just run through things and doublecheck here and there :) Thank you Torsten
  5. istel

    AOUT problem

    The Gate LEDs don't light up either, shouldn't they be doing that in the tutorial application? I think i should try and just run through all connections on the aout board. It might also be the 6007b shunt which isn't sitting correctly.
  6. istel

    AOUT problem

    Hi I feel i ask a lot of questions on this forum, but i am very grateful for all the answers I am currently building the AOUT (orig version) and i just finished the bipolar PSU, plus the board and tried hooking everything up to the my LPC1769 core The LED lights up on the AOUT and i am running the AOUT tutorial, but i can't figure out if everything is working correctly. I have tried measuring the different outputs on the board with my multimeter but i get a constant reading of around -10v on all outputs, thinking this isn't correct I am sending loads of different notes and velo
  7. I am quite sure that i have stored the LCD params. I run the lcd_width, lcd_height, lcd_type, lcd_num_x and lcd_num_y and then store afterwards. It says it is saved. I see how it shouldn't be the operating system, but for some reason it is only when sending applications from his computer that we have the issue. We'll try out the small font, seems like it would be worth it. Saving every pixel!!
  8. Yeah, this is so nice!! Before it was only a 2x16 CLCD, but this can show so much more info!! But we are having slight issues - we are two persons working on the software, one OS X and the other is Linux. Every time my friend tries to send an application to the device the screen will fail, and we have to flash the bootloader, update LCD settings and then send the application from my computer (OS X). Is there somewhere where the bootloader config is being set without us knowing? It seems that everytime he tries to send over the application something is being reconfigured with the LCD and i
  9. Hehehe! Yes, slightly adventurous! Now it works - i see how it looks a little funny, but i think everything is wired up correctly now.. The error was the caps - i had read the wrong value in the schematic, i thought it say 0.2 uf and not 2 uf :) swapped them out and now it works!
  10. Okay, so i tried making it work today. Made a small proto-board to mount the display on and i think i have made the right connection. If i measure on it, there is 3.3 v where there should be. I have updated the bootloader config to the dog_glcd and set the resolution to 160x104 and it seemed to say it stored it and when booting the core the MIOS terminal says initializing LCD #1, so i think it got it. I tried running the 021_glcd tutorial and i have updated my ~/.profile and set the lcd to the uc1610. In there as far as i could see the resolution was already set to 160x104, so that should
  11. This sure looks like there is a STM32F4 PCB in the works....... :) Interesting!!
  12. Didn't see all the replys on this topic - i was planning to build this just for the AOUT, but maybe i could switch out the transformer to get more current and tap out 5v DC for the core also? Only having one power supply would be nice :) I ordered all the stuff, so now i am just going for this, but next time i'll check out the Meanwell. Thanks! Isak
  13. Hmm, i'll just check this out.. Thinking i will make the other one, but i'll see. :)
  14. Thank you Shuriken Trying to get my head around these electronics one step at a time :) Isak
  15. Hi I was looking for a straight up BOM for the +/- 12v PSU for the AOUT board, but i can't seem to find any, so i am trying to gather the components for myself based on the center-tap transformer mode http://www.midibox.org/dokuwiki/doku.php?id=bipolar_12v_psu#center_tap_transformer I was thinking this setup: Transformer: http://www.reichelt.de/Transformers-PCB-5-0-8-0-VA/EI-42-14-8-215/3/index.html?&ACTION=3&LA=5&ARTICLE=27411&GROUPID=3316&artnr=EI+42%2F14%2C8+215 Rectifier: http://www.reichelt.de/Rectifiers/B40C800DIP/3/index.html?&ACTION=3&LA=5&ART
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