mcmurray

Apologies for the late reply (been busy af with work) but here's mine for a serial number - I hope this is the right place to get one, if not let me know where I should post it. This was such an enjoyable build I'm considering a Loopa :)

Probably a stupid question BUT is it possible to remove the bottom of the case only, to get at the core and ribbon cables but leave the front panel interface intact? Doesn't look like it but I thought I'd ask before I pull it apart completely.

It's working, but I will pull it apart one more time (not until I've played with it for a while first!). MIDI OUT1 port isn't working, probably the connector for that board needs re-seating. And some of the pushbuttons are not properly aligned. Both issues are my fault though.

I got both OLEDs working! It turns out one of the cables was bad, which just goes to show how careful you need to be when making them. They looked ok, but I've been building them with vice grips which isn't optimal. I need to get a bench clamp like Hawkeye uses. I will put this thing together now, thank you latagid and lp1977 for your help! Hope everyone is staying safe :)

Partial success! Apart from the OLEDs, the sequencer appears to be working in both LH and RH mode. I did what lp1977 suggested and ignored seq_r testing, and loaded the full program and the hwcfg. I get the "DEFAULT" scroll accross the matrix on startup, and the transport buttons appear to work. Now all I need to do is troubleshoot the OLEDs. I built the cables exactly as shown on the video but both displays are blank. Is it possible to get a list of OLED pins and the voltages which should be on them so I can do some further testing?

Thanks! Was thinking about trying this also, it did cross my mind that maybe seq_r was buggy. Will report back.

Can the full SEQ program run with just the JA or the LEMEC-L board connected? I'd like to narrow down the fault by testing JA first if possible. I want to know that the core is operating as expected then I'll connect remaining boards to see where the problem lies.

Jumper is set to 3.3V and R33D is 560R (561 written on the SMD resistor). I've just changed configuration to LH, run seq_l and nothing is showing on the OLEDs. Next I will check the OLED cabling, will report back!

When the boards are configured as left handed, seq_l works perfectly, including fluxtest, CC16 and pushbuttons/LEDs. Have not tested the OLEDs in this config, I will however. When the boards are configured as right handed, with seq_r loaded only the pushbuttons/LEDs on the JA board work. LEMEC pushbuttons do not trigger the LEDs, and produce random lighting of the keys. CC16 doesn't have an affect on the LED matrix. With OLEDs connected they are blank. Is there anything else you can think of which would cause LH configuration to work, but RH to not work? I will check everything you mentioned. Thank you.

Some progress - I found seq_r and now fluxtest works again. With debug mode on the led pushbuttons are not lighting up, and the LED matrix is not changing with CC16. Will continue troubleshooting and report back.

Thanks for that reply latagid, managed to sort that issue out :) Here's where I am now. All testing throughout the build process was successful, further problems arose once installing the modules in the case. When I load seq_l now, I get the result in the picture above. Debug mode does not register any inputs. I wonder if I've shorted something, will continue troubleshooting (starting with removing modules from the case and re-testing per the build video) and post back here. I noticed the ribbon cable connections are different in the RH case compared to the testing which was done in the build video. Does the seq_l program need to be changed to accommodate this so that testing may be conducted in this configuration?

Edit: got it working by re-soldering IC1, got the idea from this post: Hi guys, finally it's my turn to ask questions in this topic. My build is very close, I can feel it! I'm currently testing my LEMEC boards. Happy to report that nearly everything works apart from the 3rd encoder on the LEMEC-R. Turning it gives nothing in the debug window, however pushing the button works. I've tried the other encoder board, but the problem remains. Have checked soldering in that area, as well as checked for shorts. Any ideas on what I could try next? Is there a schematic available?

It was J4B that I installed but shouldn't have. No worries, I will use a normal 0.1" dual pin header row. Thanks!

Which 10-pin shrouded headers should not be installed? I'm up to the part where the LE-MEC boards are tested, however my LE-MEC-R board doesn't have J89 SRIO IN header installed, and I don't have any left. I think I will use a classic gold pin header instead. btw am having a blast building this kit, the work done by all is outstanding.

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