Thanks for checking! I just revisited the BOM parts late last night and I think those are reflected in your list above?

All in all, the replacements should generally work but I have not tested anything and can’t offer any guarantees. I didn’t find replacements for IDC headers or pin headers. Shrouded headers can always be replaced by breakaway strips.

The trimmer pot is not used for OLED displays, so I decided to list it as DNF.

757-TBD62083AFWGEL would potentially replace the TBD62381 driver chip and is due to be restocked at the end of July. Otherwise, just consider having no activity matrix for the time being. Or if you are desparate, maybe it would work to bridge across the pads and have no sink driver. Pads 9/10 are the power supply and shouldn’t be bridged, but otherwise 1->18, 2->17 etc.

Have fun building!

    @Eggi as an update for the LoopA/OLED situation - we’ve decided to stock and include the OLEDs in the LoopA kits from now on - the discontinuation on Mouser fortunately happened while we were sold out of LoopA kits. Thanks a lot for notifying us about that change!

    To solve the problem, current LoopA kits will now come with the OLED included, very similar to the SEQ v4+ kits, which also include the required OLEDs.

    Best regards.
    Peter

    23 days later

    Hi all,
    I’d have another small question regarding alternative parts, this time for the SEQ v4:

    As a replacement for mousers 660-MF1/4DCT52R1002F (Metal Film Resistors - Through Hole 10Kohms 1% 100PPM ) I ordered LR0204F10K, also 10Kohms, 1%, 100PPM, 1/4W, but I noticed there is a difference in voltage rating (250V vs 200V). Am I correct in assuming that this will not make a difference, since the SEQ is running on 5V anyways?

      23 days later

      You could consider ordering 798-MDF710S254DSA56 and just offset the row/remove 2x pins so it still sits flat. Or cut it down, but that might look a bit messy!

      Elsewise seems to be available at the end of October.

        Dremel for the win 🙂 - as Andy wrote, the good thing with headers is, that you can always shorten them.
        Many greets,
        Peter

          6 days later

          thanks! that are good news! i will go for the shortening thing.

            2 months later

            Hi all! after taking a little detour and using another sequencer for a while I’ve decided on the midiphy Seq v4+ and am very excited to get stuck into the build.

            Was looking at the BOM and it looks like I can source everything except the 6 x BC817-25LT1G. Any suggestions on an possible alternative?

              Hello, a Mouser parametric search gives the following components with similar specs:

              Mouser Part Number		Mfr Part Number		Mfr.
241-BC817-25R100001		BC817-25_R1_00001	Panjit
863-BCW65ALT1G			BCW65ALT1G		onsemi
863-BCW65CLT1G			BCW65CLT1G		onsemi
863-BCW66GLT1G			BCW66GLT1G		onsemi
621-BC817-25Q-7-F		BC817-25Q-7-F		Diodes Incorporated
522-FMMT455TA			FMMT455TA		Diodes Incorporated
621-BC817-40W-7			BC817-40W-7		Diodes Incorporated
621-BC817-40Q-7-F		BC817-40Q-7-F		Diodes Incorporated
241-BC81716AUR2000A1		BC817-16-AU_R2_000A1	Panjit
241-BC81740AUR1000A1		BC817-40-AU_R1_000A1	Panjit
750-BC817-25-G			BC817-25-G		Comchip Technology
241-BC817-40R100001		BC817-40_R1_00001	Panjit
833-BC817-40HE3-TP		BC817-40HE3-TP		Micro Commercial Components (MCC)
821-BC817-25RF			BC817-25 RF		Taiwan Semiconductor

              Of those, the most familiar manufacturer is OnSemi or Diodes Inc, so I would suggest to try one of those.

              Have fun!
              Andy

              • Drox replied to this.
                a month later

                I think 595-MC3487NE4 also works at Mouser, no?

                • Drox replied to this.
                  2 months later

                  Is there a difference between 517-N2516-6002RB and 517-N2516-517-D2516-6V0C-AR-WE 16pin sockets? Both are one piece on the bom list.

                    18 days later

                    For my MatriX: Mouser announced the Bourns Slide Potentiometers (PTL30-15R0-103B1) not before August 2022. As well as the red 8-pin sockets (7-215079-8) are not available.
                    Has someone an idea where I could get them from, instead?