freddy

Hmm, sounds reasonable, I missed the DOUT point. Okay, I'll pass the (appropriate) MIDI data to the synths via J4B via SW, I already found an appropriate solder point with TTL MIDI in on the device. Looks like BB doesn't support Syx at all, since passing the MIDI data is done by SW I'll probably implement a kind of filter no to bother the poor BB more than needed. Thanks again, freddy

TK, thanks for the reply' Hmm, that sounds like the configuration I was trying to avoid - converting the current loop to TTL and driving separate MIDI output circuit (ehm, basically a single resistor). The idea was to build a small portable Bassline Synth using 4 BassBoy modules and using Core 8 with SCS to configure the them - each module requires 5 DOUT pins (4 for selecting MIDI channel and one to select module operation mode). Looks like a 6th DOUT pin will simply be used by TTL MIDI output and the Through function will be done by software by using MIDI Router app bits and pieces. Makes sense - thanks again! Cheers, freddy

Guys, I can't seem to find (I always struggle with Google about using proper keywords) a way how to connect MIDI output (current loop, not TTL-level) to multiple inputs - MIDI standard permits that - without using additional hardware (that is without converting MIDI in to TTL and using the TTL level to drive multiple MIDI out circuits creathing a multi-Thru device). Should the connection be chained: MIDI Out + ----- ---------- ---------- ---- MIDI Out - | | | | | | IN1+ IN1- IN2+ IN2- IN3+ IN3- or connected in parallel: OUT+ OUT- | | +-------------+------------- | | | | | +-------|-----+------|----- | | | | | | IN1+ IN1- IN2+ IN2- IN3+ IN3- (Sorry about the ASCII, no mood to open Paint-like tool). Thanks, freddy

Orange, Here it is, the images are self-explaining, if you want to take picture from another side, angle, or caps combination, let me know, I'll have the camera around me till Sunday, flying back to Frankfurt on Monday. Edit: I just realized that the 19mm caps will be covering the LEDs so the LEDs would need to bended a bit (by app 1.5mm) to the top. There is still enough place to fit a 3mm LED between the rows, though.

I'm not sure how this is done from the legal point of view but I just wonder if these chips could be offered at SmashTV's? I'm pretty sure he has more resources to get the chips in larg(er) quantities and have them lying around for some time. Definitely more reasonable than trying to get 250 orders in a bulk to get a tube :sad: Just my two cents, maybe this was already discussed before (and was decided to be a no-go)...

point taken, though I wouldn't consider them being 'unwanted parts', 'extra parts' sounds better to me (though not probably to my wife when she walks by my DIYers lair) :phone:

ilmenator - no kidding, I told you about the source and the price before (PM on 7/1) though without the links :sad: orange - while browsing PMs with ilmenator I found some poor quality pics of the 19mm caps, attaching them as a teaser before I'll make proper pictures the following weekend. Basically, to get an idea, using 16mm caps (the smaller and more expensive at Conrad) this leaves ~4,5mm space between the buttons as can be seen on ilmenator's Wiki page, using 19mm this leaves ~1.5mm for the panel width.

PM sent

Sure thing, unfortunately, I won't be able to post pics before following weekend (23-24/2). If you're unpatient (like I was) you better get the 16mm buttons till then, these were documented already on ilmenator's wiki :rolleyes:

Orange, this one is 19mm (18.3x18.3 but 19mm hole), this gives the panel lines between the caps a bit too thin. I accidentally bought 130 of these (from another supplier) and could take a picture of populated board with the buttons over the next weekend when's my next home visit scheduled if it matters for you (still, they're 18 cents cheaper, for 64 this makes >10 EUR difference). Anyway, I can sell you these if you want to, my local supplier has them here for 0,2910 EUR pp (excl 19% VAT). I could also sell you 64 buttons I've got spare, I got them for here for 0,62 EUR pp (again, excl. VAT, Conrad sells them for 1,40 EUR) - I bought two sets of buttons and (wrong) caps hoping for 2 PCBs from ilmenator :rolleyes: Sorry for advertising, this should probably be part of Fleamarket topic. Cheers, freddy

LOL, quite a few interesting (and helpful) tips appeared here, I definitely will make use of them :rolleyes:

Daniel, I made the fatal mistake with ordering only the caps hoping they'll fit to ordinary (i.e. Europe) 12mm tact switches but this wasn't the case. I had the chance do use my Dremel to cut approx 0.2mm from each switch which wasn't the way to go for me since the switches were alrady soldered in. This left me with two sets of DigiKey caps I'll sell you happily. But, actually, this makes the goods price vs. shipping ratio even worse for you since unless anyone else has spare switches you need to source them from DigiKey/Mouser anyway. Let me know if you're interested. For my SEQv4 I ended up using different caps (round ones) and ordinary 12mm switches I was able to source locally and modified the panel design. Hope this helps, freddy

No problem with the display itself, it's HD44780 compliant, but like Duggle stated you plan to use multiple of these the wiring might be a pain...

Well, I'd guess GM5 is a long run order, more a Fleamarket subject that the actual bulk order and getting even to 250 in bulk order will take looong time. This is even worse with last few GM5 boards being available from nILS, if there were more the chances would increase rapidly. Please don't read this as I'm ready to spend 875 EUR for the chips hoping for selling it but if we also got support from having the boards available I'd probably consider...

Well, pins 15 and 16 are not connected based on the attached datasheet (though A+ and K- is depicted in the block diagram), maybe the pins are located elsewhere (I don't see them on the diagrams, though they could be located on the other side of the LCD for other MC4002D-series display I found datasheets for). This could be the case if swapping the two pins doesn't make the LCD light assuming the trimpot was turned there and back to make sure. Hth, freddy

I'm about to use Recom RS-0512D in another project (being able to convert 5V to +/-12V), also, it's being used in mistralXG design (and I assume successfully) that was discussed some time ago. Maybe definitely worth a try but it's only up to 3W, which still should be plenty for few opamps. Hope this helps, freddy

...and/or acrylic LCD windows - though I'm owning a CNC myself I never was able to get good results while cutting acrylics though this was probably a result of using no fancy (i.e. expensive) cutting bits. I used Cut2D program to create the tool path for Mach3, in case you're interested in giving it a try...

ilmenator, I've converted your AI back to FPD, I'm attaching it if you want to put it to the wiki. It was seated to 3U panel but the whole 16x4 BLM is a single block and can safely be moved around or copied/paste to another panel design. freddy mbseq_4x16.fpd

Ilmenator, understood and, of course, agreed. Looking forward for the bulk (if it happens), I'll wait with ordering the front panel - it fits so nicely next to your 16x4 BLM :-) Cheers, freddy

Looks nice, congratulations! Did you order 1-2 prototypes only for initial testing an then consider ordering larger amounts (if at all)? The obvious reason why I ask is that I'd love to test/usr one, too :-) Cheers, freddy

Looking forward to see the design finalized! So do I, though I probably will use some spare LCDs from my shelf-supplies so the pinout cannot be expected to fit, I hope I'll be able to solve it using wires. Sorry for answering for ilmenator but since i have one of the boards as well these are Marquardt 6425 buttons (with no LED) with the 16mm cap.

Mine arrived as well, thanks a lot!

Hello, if there are some spares (though I'm afraid i doubt it reading the thread through) count me in as well, I'm lacking a small portable FM synth, the whole MBFM just isn't really well-suited to travel with me by plane :rolleyes: Thanks a lot, freddy

lucasmedus, according to my understanding MF_NG contains a dedicated PIC, can be used standalone or integrated to some more sophisticated HUI and is accessed by MIDI, so there is no limit for chaining MF_NG units other that implied by MIDI protocol itself (within a reasonable practical limit, of course). Correct me if I'm wrong, hope this helps, freddy

Hi, I'll take two cores, remaining DIN and two DOUTs. 2007 - which core PCB revision was that? Cheers, Adrien