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latigid on

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Posts posted by latigid on

  4. Out-of-stock parts for midiphy BOM tool

    in MIDIbox SEQ

    Posted

    12 minutes ago, Phatline said:

    UI:

    all other is unchanged? > means you just add this lines to the end of the Boom List?

    The only things I've added are basically ribbon cable and IDC headers. You don't need the USB-AB cable/SD card I'm sure. One of the pin headers was changed a week or so ago (now 929700-01-36-RK), if you bought the longer ones they'll still work but you'll probably have to trim them shorter.

    Also, there was a period where the multiple projects in a kit were not counted in the kit BOM, thus you might be missing Hirose headers (MDF7-10S-254DSA55).

     

    Just now, Phatline said:

    652-3306F-1-103 (for displays?)    can i substitue the 10K trimmers @ corekit with 20K ones? >

    Should work out fine. Actually, the OLEDs don't use a backlight, so you can even leave them off.

  5. midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    Well :) 

    We're waiting on a batch of cases and Peter's tutorial videos, but apart from that...!

    You'll notice that practically all parts are listed in the midiphy BOM modules, especially the Core and SEQ UI kits. It should be safe to order, but Mouser normally ships within a few days so you can hold off there too.

    Note that there are things there you may already have, such as an SD card and USB cable. It's just for completeness and for "easiest ordering possible." Maybe you still have a stash of IDC headers and ribbon cable etc., so you can remove what you don't need from the Mouser cart. If you like midiphy projects, stock up on SOIC 74HC595 and 74HC165, 1206 100n capacitors etc. as these are used quite often :).

     

  8. midiphy SEQ v4+

    in MIDIbox SEQ

    Posted · Edited by latigid on

    Yeah, it's super difficult to keep track of what's current at Mouser. Often entire supplies of 20k parts just disappear or go end-of-life without much warning. I'll start a new thread and users can post when things are out of stock and Peter or I can update the backend. 

    You only need 16 pins x 2 pieces (2x8 right angle header for the displays) so if you can find a cheaper one, go for it! We'll use Mouser as a reference for parts, but many of them could be substituted for cheaper ones. It's just a question of time on your side, extra shipping, things you may have in stock already etc.

    EDIT: sorry, I got confused about parts. You need a 2x12 normal pin header; this is to connect the Activity Matrix to lemec_R shift registers. Maybe a shrouded header will fit too, but we'd need to check with the next case rev.

  10. midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    Hello,

    Glad you liked the tutorial video! Peter deserves a lot of credit for these and he does a fantastic job. 

    One of the pin headers is a bit too long. We are looking to replace 929834 with the 929700-01-36-RK part. If you've already ordered, no problems, but you may have to trim the pins a little shorter. It might also work with a standard single-row male pin header of about 6mm in length. 

    Apart from that, I don't think there were too many changes in the last while.

    Agreed about your technique; I just put a blob of solder on there and cleaned it up after! (they are capacitors) 

    The ribbon cable, IDCs, screws, nuts, washers etc. will be done as a separate "BOM" attached somewhere else, such as the case. Work in progress!

     

    Thanks again for the feedback and good job on the PCBs so far.

    Best,
    Andy

    • Like 1

  11. midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    Peter's probably too busy to answer, but as he said above, he's filming the doku stuff now, which does take a lot of effort. We'd also need to place an order for cases. Other than that, everything is ready I think!

  13. dipCoreF4 and dipBoardF4, a compact Core.

    in Design Concepts

    Posted

    Isolate is a polygon parameter that automatically keeps distance to routed traces, drill holes and pads. I am very conservative with isolate (0.5mm/~20mil).

    Clearance is the distance between two routed traces, also related is the distance between copper and a dimension (edge of board or slot).

    Conservatism is overkill, but the more conservative, the less chance of something going wrong. E.g. imagine a piece of dirt or dust on the photomask. If the clearance is too low, the fault might manifest into the production and short or cut a trace. Just because the fab gives low min clearance rules, doesn't mean they're a target. 

    Just my opinion of course, please decide what's right for you.

  18. seqv4 songmode

    in MIDIbox SEQ

    Posted

    Hello,

    Check out the masterful SEQ beginners guide, particularly under "5.2.3. Save & Take over Patterns." This I think aligns with your idea.

    You may want to read about bookmarks, which are available as a related but different workflow controlling things like groups of mutes or the view type. Bookmarks are a selection-row mode on the midiphy.

    Best,
    Andy

     

    • Like 1

  23. midiphy SEQ v4+

    in MIDIbox SEQ

    Posted

    Thanks for the great feedback!

    I don't use solder paste myself, but it may be easier to work with once it's a bit warmer, so I've heard of leaving it in your pocket or so.

    You can find out about SWD programming here: 
    http://www.midibox.org/dokuwiki/doku.php?id=wcore

    The test-as-you-go idea is a good one; this would basically consist of checking SMT pins were not shorted together, that the +5V rail is good before applying power etc. There's not too much to debug especially on the I2C/MIDI8 boards etc. as they're quite simple. But a basic MIDI test would not be a bad idea.

    Best,
    Andy

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