henri Posted January 2, 2010 Report Share Posted January 2, 2010 Please i have make a seq V3 and when I start it all the leds are ligting what's hapen? My LCD does run also Quote Link to comment Share on other sites More sharing options...
latigid on Posted January 3, 2010 Report Share Posted January 3, 2010 Not enough information, sorry. Can you please be more specific about your problem? Your LCD works correctly? Is it an issue with your soldering in the DOUT chain ? Quote Link to comment Share on other sites More sharing options...
henri Posted January 3, 2010 Author Report Share Posted January 3, 2010 My LCD work just a pin desolder but there is no ligt alls leds are ligting no boutons or controler run there is a terminaison solder on DOUT and DIN The mios is good scuse my bad english i'm french Quote Link to comment Share on other sites More sharing options...
philetaylor Posted January 3, 2010 Report Share Posted January 3, 2010 (edited) When you say there is no light, do you mean no backlight? What model display are you using? Are you sure you have A (Anode) and K (Cathode) connected the right way round? It is an LED backlight and not EL? Have you loaded the MB-SEQ software? What is on the display? It may be easier to ask on the French board http://midibox.org/f...um/24-francais/ although your English isn't that bad :) Giving as much information as possible is always a good idea! Thanks Phil Edited January 3, 2010 by philetaylor Quote Link to comment Share on other sites More sharing options...
henri Posted January 3, 2010 Author Report Share Posted January 3, 2010 I have no backlight My 2 LCD are 40 x 2 - DEM 40271 buy at smash for seq V3 I have upload the mios and after the "setup_mbseq_tk.hex" so i joint a picture of the Seq with LCD working Quote Link to comment Share on other sites More sharing options...
philetaylor Posted January 3, 2010 Report Share Posted January 3, 2010 As they say "a picture tells a thousand words!" :) So MB-SEQ is up and running... That is a good sign! Can you describe how you have connected the LED's? As they are all on, can you check that you have wired them as per this: http://www.ucapps.de/midibox_seq/mbseq_v3_dout.pdf On the DOUT module, you should have a 220R resistor between each output and the LED with the other LED leg connected to Vs. Can you check that you have done this? If you have connected the LEDs to Vd by mistake then you would get the effect that you are seeing. Also have you connected the buttons/encoders like this: http://www.ucapps.de/midibox_seq/mbseq_v3_din.pdf You don't say if the buttons/encoders are working or not? Thanks Phil Quote Link to comment Share on other sites More sharing options...
henri Posted January 3, 2010 Author Report Share Posted January 3, 2010 (edited) I make a mistake so invert port J9 ans J8 on core Now the encoders are running but leds are also lighting The buttons run the data whell run no backlaight on LCD Just a question after that i not have to reload the seq aplication? I have mayhaps broken my registers on DOUT module? Edited January 3, 2010 by henri Quote Link to comment Share on other sites More sharing options...
TK. Posted January 3, 2010 Report Share Posted January 3, 2010 No, it isn't required to upload the sequencer application again (so long you are using MIOS V1.9g and the latest MBSEQ V3 release v3.4f) The DOUT registers won't be damaged if you connected them to J9 instead of J8 by fault. It's more likely an additional wiring or soldering error. Check especially the CORE:J8:DO->DOUT:J1:DO, CORE:J8:SC->DOUT:J1:SC and CORE:J8:RC->DOUT:J1:RC connections If you don't find the error visually, but own a multimeter, the srio_interconnection test helps you to measure the voltage levels: Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
henri Posted January 3, 2010 Author Report Share Posted January 3, 2010 Then i have verifie all my connections on DOUT. And i have find a strap non soldering oups..... now all is working only the backlight of the LCD How can i mesure voltage or test the LCD ? i have 5V behind pin 15 and pin 16 of the LCD Just a picture of my project and thanks for the helpers Quote Link to comment Share on other sites More sharing options...
philetaylor Posted January 3, 2010 Report Share Posted January 3, 2010 That's great news. Your project looks really good! Have you tried adjusting P1 as that controls the backlight brightness? I would be surprised if both backlights are faulty! Thanks Phil Quote Link to comment Share on other sites More sharing options...
henri Posted January 3, 2010 Author Report Share Posted January 3, 2010 (edited) I tried to ajuste P1 but nothing else - P2 run normally how can i test the backlight of my LCD? And if BC337 dead? Edited January 3, 2010 by henri Quote Link to comment Share on other sites More sharing options...
philetaylor Posted January 3, 2010 Report Share Posted January 3, 2010 If the BC337 was dead then you wouldn't see 5v between the A and K of the backlight (which I think you said you have). Are you SURE that you have it the right way round? pin 15 on the LCD is cathode (-) and pin 16 is anode (+) so they should go to B- and B+ on the CORE. Another possibility is that the backlight has solder bridges that may not be linked, can you check continuity between pins 15/16 on the LCD and the actual connections to the backlight? Looking at the datasheet, it is possible to switch the polarity with different bridges. Assuming you have the DEM 40271 SYH-LY, this might be your problem, take a look at: http://www.soselectronic.hu/a_info/resource/d/dem/dem40271sy-ly.pdf Phil Quote Link to comment Share on other sites More sharing options...
henri Posted January 3, 2010 Author Report Share Posted January 3, 2010 yess you're right. I have see your datasheet and pins 15/16 are inversed I soldere the pins like the "Building a MidiBox LCD Cable" tutorial of ucapps and it was wrong The back light run correctly thank you very much doctor ;o) Quote Link to comment Share on other sites More sharing options...
philetaylor Posted January 3, 2010 Report Share Posted January 3, 2010 You're welcome, glad it's all working for you. I would love to see some pictures of the finished project! Just to clarify, the tutorial isn't exactly wrong, it is just based on a different LCD to the one you have :) Phil Quote Link to comment Share on other sites More sharing options...
henri Posted January 3, 2010 Author Report Share Posted January 3, 2010 (edited) ok ! On the left of the machine i'll put some effects like boss RT20 rotofil and boss space-echo and .... myscelanous...... Edited January 3, 2010 by henri Quote Link to comment Share on other sites More sharing options...
henri Posted January 6, 2010 Author Report Share Posted January 6, 2010 just a picture with the effects Quote Link to comment Share on other sites More sharing options...
latigid on Posted January 6, 2010 Report Share Posted January 6, 2010 Simply amazing! MIDIBox Of The Week for sure. Quote Link to comment Share on other sites More sharing options...
henri Posted March 19, 2010 Author Report Share Posted March 19, 2010 I have finished it. Quote Link to comment Share on other sites More sharing options...
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