latigid on Posted May 26, 2020 Author Report Share Posted May 26, 2020 Many thanks for reporting and I'm glad it works! Is the hub also connected to the computer and sending data that way? There is an OTG startup sequence where the devices have to decide who's the boss. Maybe things don't make it that far if there's too much going on with the datalines. Just speculation! Quote Link to comment Share on other sites More sharing options...
slo Posted May 26, 2020 Report Share Posted May 26, 2020 There is no computer connected, with just a hub under power, that's enough to stop OTG, maybe the hub is sending some current sensing data...just speculating also.. Quote Link to comment Share on other sites More sharing options...
Antichambre Posted May 26, 2020 Report Share Posted May 26, 2020 (edited) Oh I miss that you used a HUB, I understand now sorry. In fact the OTG is switching to host and works fine... A Hub constantly polls its downstream ports until its connected host has enumerated the devices then the Hub stops polling and creates paths between the host and the devices. But if no host(upstream port) replies(not connected) the hub continues to poll the devices periodically, this should perturb the transaction between the Seq(in Host) and the controller, they all use the same lines. No I'm wrong it should work cause it's always the host which polls the devices, the Hub just monitors the voltages on the signal lines (D+ and D-) at each of its ports. The device has a pull up which brings the data lines high and this enables the hub to detect that a device is attached to it and its speed depending on the lines. Once the device is detected, the hub continues to provide power but doesn’t yet transmit USB traffic to the peripheral. Then should not perturb the lines.Really sorry cause I knew that, I already experienced it too but didn't read enough your first post. Lol Still really sorry cause I experienced the same situation but I can't give any good explanation. :/ Edited May 26, 2020 by Antichambre Quote Link to comment Share on other sites More sharing options...
niles Posted June 3, 2020 Report Share Posted June 3, 2020 Hi Andy and Peter - Got a weird bit of behavior from encoder #9 and looking to see what your recommended steps to diagnose would be. The encoder is showing some weird behavior - pressing it works and registers, turning it while it's pressed registers, but just regular turning it doesn't work. Sometimes after I press it it works a little bit like it's skipping around but mostly it's dead unless I'm holding it down and turning it at the same time. Encoder went bad do you think? Thank you Quote Link to comment Share on other sites More sharing options...
latigid on Posted June 3, 2020 Author Report Share Posted June 3, 2020 Hi, These encoders should be decent, so I wouldn't think the encoder had gone bad. Rather, there might be an interconnection issue. The 9th encoder is connected to pins 4 and 5 of J1, so check that you get good contact there. If the pins don't reach far enough into the through-board header you might get an intermittent contact. Check all solder points too as you might have a dry joint etc. Best, Andy Quote Link to comment Share on other sites More sharing options...
niles Posted June 3, 2020 Report Share Posted June 3, 2020 Awesome...I'll start there - thanks for the fast reply! Quote Link to comment Share on other sites More sharing options...
srmaietta Posted June 18, 2020 Report Share Posted June 18, 2020 Hello gents, Im building my Midiphy Seq and want to check something before I move on.. First video, 35 minutes in -"gold headers" - I didn't get any gold headers in my mouser order, but did get two different versions of the single stick pin headers. One is a 3M part, there are two in the order. Mouser part# 517-929700-01-36-RK The second single row straight header is "FCI Headers & Wire housings" One stick came in the order.. part# 649-93992-436HLF The 3M parts are taller. Why are there two different types? Which header stick should I cut up for this step? Is there a list anywhere of which parts go on each PCB? Or is the video it? thanks a lot! ~Steve - Quote Link to comment Share on other sites More sharing options...
latigid on Posted June 18, 2020 Author Report Share Posted June 18, 2020 Hi Steve, Please refer to the BOM e.g. https://www.midiphy.com/en/shop-details/137/47/midibox-seq-v4-lh-full-essential-kit- This is the whole "kit BOM" but each PCB also has its own BOM page for easier reading, plus you won't get confused with the coded "shop names" of the PCBs. There you can cross-reference all parts with the silkscreen names on the PCBs. You could in effect use the slightly longer pins for everything. I think the "standard" pins are only used for jumper headers etc. Where it's important is interconnecting the lemec and plate PCBs with through-PCB headers/sockets. A "standard" header length works but might not give quite the right contact, therefore slightly longer ensures a better connection. Have fun building! Best, Andy Quote Link to comment Share on other sites More sharing options...
srmaietta Posted June 18, 2020 Report Share Posted June 18, 2020 Thanks Andy, that solves it. And the build continues! -Steve Quote Link to comment Share on other sites More sharing options...
srmaietta Posted July 21, 2020 Report Share Posted July 21, 2020 Allright MIDI masters, Im at the point where Im testing my JA board with NG running on the core and all I get is lots of data coming into MIOS studio and lots of flickering LEDs. At least I know all my LEDs work. Loading NG was no problem. "load seq_l" is when all the data streams in and flickering begins. Any ideas on how to troubleshoot this? thanks ~Steve Quote Link to comment Share on other sites More sharing options...
Hawkeye Posted July 21, 2020 Report Share Posted July 21, 2020 @srmaietta could you check that you soldered in the correct resistor network type? There is one in the BOM that looks similar but is different. Best regards, Peter Quote Link to comment Share on other sites More sharing options...
srmaietta Posted July 21, 2020 Report Share Posted July 21, 2020 Peter, It seems that I did indeed put the non-bussed resistor array in that spot...... damn. time for desoldering!! thank you for the quick response ~Steve Quote Link to comment Share on other sites More sharing options...
Hawkeye Posted July 22, 2020 Report Share Posted July 22, 2020 @srmaietta - no problem at all, it happened before! :) It should also be an easy fix - the easiest way to remove the resistor network is by using a hot air rework station (around 40€, if you don't have one, google for "858D" :)). When doing that, make sure to heat up the pins until you can see the solder "liquify", then use small SMT tweezers to pull the part off the board, not using too much force - it should go easily, once everything is hot. Best regards! Peter Quote Link to comment Share on other sites More sharing options...
srmaietta Posted July 22, 2020 Report Share Posted July 22, 2020 Part swapped and it is now working as it should!! On to the control panel PCB's! Thanks again! ~Steve 1 Quote Link to comment Share on other sites More sharing options...
latigid on Posted July 22, 2020 Author Report Share Posted July 22, 2020 Good job! Quote Link to comment Share on other sites More sharing options...
Againsistm Posted July 30, 2020 Report Share Posted July 30, 2020 Hi guys, What does the gate jack do on the back of the midiphy. Cheers, Niels Quote Link to comment Share on other sites More sharing options...
latigid on Posted July 30, 2020 Author Report Share Posted July 30, 2020 What did you have in mind? If you want, you could assign it to any function in the HWCFG SR Pin 1/7* 6 *1 for LH, 7 for RH There is a Moog v-trig converter on there, so a positive gate at the tip of the jack should pull the 165 pin low and enact a DIN event. How about clocking in an analogue tap tempo? The 3.5mm ring is connected via resistor R4 (USB PCB) to SR pin 5. Probably the 10k value is too high, rather go for 4k7 or less (e.g 1k/2k2). So shorting the ring to 0V will trigger a DIN event there. And a post from 2011 illuminates the actual intention: Quote Rômulo aka. Midilab started to implement a footswitch function which is especially useful for live recording and track modifications while playing on a keyboard. Press&Hold the footswitch to enable record mode, release it to disable record mode. Tap the footswitch shortly to delete the track. The footswitch can be assigned to a free DIN pin in MBSEQ_HW.V4 So: # SR Pin BUTTON_FOOTSWITCH 1 5 or for RH # SR Pin BUTTON_FOOTSWITCH 7 5 Please test it if it sounds useful! Best, Andy Quote Link to comment Share on other sites More sharing options...
Againsistm Posted August 3, 2020 Report Share Posted August 3, 2020 Ah cool, thanks Andy, Thanks for explaining. Quote Link to comment Share on other sites More sharing options...
srmaietta Posted August 5, 2020 Report Share Posted August 5, 2020 Quote Guys, a quick question about cable lengths for the RH hardware build. 'Im testing everything here (fluxtest - success!) and its all been great but I realize that I'm following the video which has me building an LH seq. I don't want to keep going forward and have to remake the cables, Is there a place where RH cables are listed? thanks ~Steve Quote Link to comment Share on other sites More sharing options...
latigid on Posted August 5, 2020 Author Report Share Posted August 5, 2020 Nice that you got the FLUXTEST working! Cables should be almost the same lengths for RH/LH, as they have to travel from the left to the right for both cases' cases. :) 1 Quote Link to comment Share on other sites More sharing options...
latigid on Posted August 5, 2020 Author Report Share Posted August 5, 2020 Building an RH Building an LH But Peter shows you the differences here. So if I understand the assembly video you can change the location of the longer cable to suit your case variant. Quote Link to comment Share on other sites More sharing options...
srmaietta Posted August 5, 2020 Report Share Posted August 5, 2020 Thank you Latigid! I think I found an issue with the BOM, (or the case hardware packege, either way) For the line TR/RX we have DB25 connectors with a 4-40 thread and it should be an unthreaded hole (so we can use the Metric screws and locknuts) The part in the BOM, Mouser 636-182-025-213R561 should probably be 636-182-025-213R551 which is the same part but would come with a bare .120" hole suitable for longer screws and nuts!! (Of course not in stock!) https://www.mouser.com/datasheet/2/296/182-yyy-213Ryy1-54286.pdf Off to buy two screws!!! ~Steve Quote Link to comment Share on other sites More sharing options...
latigid on Posted August 5, 2020 Author Report Share Posted August 5, 2020 (edited) Yep, the case hardware screws won't work perfectly with the Mouser part. I would personally recommend to use the 4-40 MF standoffs that come with the DB-25 socket as case mounts and keep the black screws for another day. Then you can properly mate a DB-25 cable. If you prefer the look of the >>panhead<< screws, feel free to mangle the thread in the DB-25, but you need nuts on the inside to keep it tight. Edited August 5, 2020 by latigid on 1 Quote Link to comment Share on other sites More sharing options...
srmaietta Posted August 5, 2020 Report Share Posted August 5, 2020 aaah, right.. I forgot about Db25 connectors and their screw locking. Its been a while since I've used one!.. Cheers! Quote Link to comment Share on other sites More sharing options...
Smithy Posted May 9, 2021 Report Share Posted May 9, 2021 On 12/18/2018 at 10:02 PM, rbv2 said: it is labeled 4816P LF1-103 C1745 .. this is the wrong one right? edit: it definetly is the wrong part. .which leads me to the next wrong part on the LE MEC RH PCB.. :D thank you so much for you help!!! So I've been getting erratic behavior with the LEDs on the switches of the JA PCB. I wonder if i made the same mistake soldering the wrong type resistor network? The markings on the IC at RN1 are 4816P LF1-103 C1809 instead of 4816P-T02-103LF. I blame myself for not checking the BOM on midiphy and solely relying on the video! Thankfully i have a hot air station, flux and solder paste so should be able to remedy this issue. Quote Link to comment Share on other sites More sharing options...
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