flyweight Posted February 15, 2018 Report Posted February 15, 2018 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_NGAnd 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 config4.5v 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 Quote
flyweight Posted February 15, 2018 Author Report Posted February 15, 2018 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 Quote
flyweight Posted February 15, 2018 Author Report Posted February 15, 2018 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 Quote
slo Posted February 17, 2018 Report Posted February 17, 2018 Run testaoutpin cs - si - sc with 1 and 0 and look for the switch in voltage at the pins, if you get that then all your wiring & config is good. Which LED are you expecting to flash? there is only a power LED on the AOUT_NG PCB. Quote
flyweight Posted February 17, 2018 Author Report Posted February 17, 2018 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 Quote
slo Posted February 17, 2018 Report Posted February 17, 2018 If LED1 does not power up then you are not getting power and/or GND to the board, or the LED is no good. Recheck connections and be sure the wiring is correct , the J19 to Aout_NG is non standard and not 1 to 1 pin placement. Quote
flyweight Posted February 20, 2018 Author Report Posted February 20, 2018 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. Quote
slo Posted February 20, 2018 Report Posted February 20, 2018 Quote I mean 5v on the /PRE input should light up the LED right? No, not if you installed the LED backwards. The LED only indicates power is available at the PCB, the Aout_NG would work without it. Remove the LED, test it with a 9v battery and resistor, if it lights install it the right way and if you didn't damage the DAC on removal, re-install it. 1 Quote
flyweight Posted February 20, 2018 Author Report Posted February 20, 2018 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 Quote
slo Posted February 20, 2018 Report Posted February 20, 2018 I'd very interested to hear your report and I really hope it works for you. I could not get my Aout_NG working and gave up after many tries, 1 or 2 other people have experienced the same thing after doing everything right, so your input will be welcome. Quote
flyweight Posted February 20, 2018 Author Report Posted February 20, 2018 (edited) 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 Edited February 20, 2018 by flyweight Quote
flyweight Posted February 25, 2018 Author Report Posted February 25, 2018 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? Quote
flyweight Posted February 25, 2018 Author Report Posted February 25, 2018 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 Quote
flyweight Posted February 25, 2018 Author Report Posted February 25, 2018 Btw found this small dc-dc conversters mentioned by Pichenette @MI ' Traco Power TMR1-1222 or TRN1-1222' so will try to use this for a +-12V psu Quote
slo Posted February 25, 2018 Report Posted February 25, 2018 This is good news. It might help me in my quest to get Aout_NG working, thanks for the update. Quote
flyweight Posted February 28, 2018 Author Report Posted February 28, 2018 Hi Slo, i hope you will solve it and make it working. I still did not have time to do the full testing. Anyhow good luck and maybe post you progress here. Cheers Tim 1 Quote
TK. Posted March 3, 2018 Report Posted March 3, 2018 Great that this helped at your side! :) But for the records: currently I'm not able to reproduce this issue. The test procedure: turn on MIDIbox with unconfigured AOUT module in CV page selected AOUT_NG module exit CV page (so that this setting will be stored) power-cycle MBSEQ -> AOUT_NG properly configured and working can be repeated with multiple power-cycles: AOUT_NG properly configured and working Best Regards, Thorsten. Quote
flyweight Posted March 5, 2018 Author Report Posted March 5, 2018 Hi T, Only 1 thing i did not mention is that I applied a bit off pressure on the tl074's so most likely i did something wrong. Maybe the contact wasn't ok before. Althought +-12v was there. I will try if i can reproduce it on my side. But if i do than highly likely I did something wrong here. Cheers Tim Quote
flyweight Posted March 13, 2018 Author Report Posted March 13, 2018 I am not able to reproduce the bug at all. Aoutng just working fine. Quote
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