i’ve been working on a seq pcb and i want to gauge whether or not there is an interest in a run of these. the pcb has a core, 4x IIC (all midi 5 in/out available), and 8x bankstick on a single board. the pcb has two lcd headers so you can wire both of them direct (pinout matches nebula’s group buy lcd), a header to the din/dout chain, and also a header to the aout. you would still have to make your own control surface. the board is about 150x75 mm. i plan on having this pcb made within the next couple of weeks or so, and after they’ve been tested i could have more made. this is not a thread to initiate a group buy, so please just post if you think you’d be interested in ordering one.
Since I did get those great lcds I am a little interested but price is a factor. Could you possibly give an estimate? would we just get the same parts needed from smash i.e resistors,crystal,octocoupler ect..?
Since I did get those great lcds I am a little interested but price is a factor. Could you possibly give an estimate? would we just get the same parts needed from smash i.e resistors,crystal,octocoupler ect..?
smash includes pcbs with his part kits, and with how busy he already is i doubt he’ll want to make a parts-only kit with this specific combination of parts. i’ll make up a mouser parts list later on. including parts with the pcb is definitely something i’m not interested in doing because i’m short on time as well.
It would help if you publish some layout picture. I`m interested in general but it depends of few factors.
i can do that when the layout is completed and tested. for now i was just seeing if there’s any interest, not to get definite answers :).
i can do that when the layout is completed and tested. for now i was just seeing if there’s any interest, not to get definite answers Smiley.
It dont have to be really complete, more like a rough preview to get clue how did you arranged IO and such. But, Im sure people would be interested as we all hate wires and we all love integrated solutions for SEQ and SID projects as much as we love modules for controllers.
When I built mine, making and stuffing the internal PCB’s (core, din/dout, iic, bankstick) took about a week. Building the control surface, on the other hand… that took months!
I think a control surface PCB would be far more valuable for people who just want a functioning sequencer.
And as sasha said, “But, I`m sure people would be interested as we all hate wires”…
The wires connecting the few internal pcb’s was nothing in comparison to nightmare of running all the wires to every button and LED on the control surface.
I’m not trying to shoot down Ultra’s internals PCB, but… someone needs to make a control surface PCB one of these days!
A few of my friends want these sequencers after seeing mine, but there’s no way I’d ever consider wiring up another control surface!!
I think a control surface PCB would be far more valuable for people who just want a functioning sequencer
I agree but I never seen 2 MBSEQ with same buttons. I think every one of us want to use different type.
I dont believe it really takes months to do CS. If you spend some time and make something else than veroboard it could save you much time and effort. I would never advise using veroboards for mounting parts for MBSEQ. I drawn my PCBs in Corel and friend did Eagle PCBs that i believe he will publish once he finish it but none of it is super universal solution. He designed his for specific button that is not very common, and I designed mine for small 6x6 common button that Ill use to mount custom cap. So, my point is that it is very hard to justify most of peoples tastes. Probably much harder than Wilba managed with his wilbabeast. Not all of people wanted to use his CS but all wanted to use base PCB! I believe same would be with SEQ.
i’ve been working on two control surface pcbs along with this (one for switches and one for encoders), but i didn’t mention them for the reason sasha gave. everybody wants a different seq. and i think mine is especially non-standard so people wouldn’t want it and it wouldn’t be feasible to do a pcb run. mine has the din/dout modules built right into it on the back of the pcbs, so the two CS boards connect together and one of them has just a single cable out to the core. if someone else came up with a “standard” CS layout that others would be interested in, i’d consider helping with working on it in the future. i would love to see how quickly and inexpensively a seq could be built if a few people came together to find out what works best.
i took a screenshot of the current pcb, so follow the link to see it. the image is big so i didn’t want to put it here in the thread.
please keep in mind: i made this pcb for myself so it’s set up the way i wanted it to be. because i’m not running a business, i probably won’t be very open to modifications. i barely knew eagle when i started this (still don’t, but i have great help) so it’s taken me a long time to get this far. changing everything for other people’s purposes just isn’t something i have the time to do.
i don’t mean to sound like i don’t care about anybody else’s concerns, i just don’t have the time to address them. the reasons i’m going to make the pcb available is to help out those who need a pcb just like the one i’m already making. perhaps the seq will become just a little more accessible to people :).
the pcb mount midi jacks are not on the board and they won’t be. also, i left out any headers that are not for midi i/o, lcd, power, din, dout, and aout.
in the image, the midi i/o headers go across the top. j8/j9 go to the core and the rest are IIC midi i/o. the IIC modules don’t need jumpers because the addressing is built into the board. i left extra room around the headers to make it easier to use the connectors. there are two connectors near the power circuit. one comes from your power adapter and the other out to a switch. you can simply put in a header/jumper or solder a bridge if you don’t want a header going out to a switch. also there’s room around the voltage regulator for the kind of “wraparound” heatsink like smash sells (they’re nice). the lcd headers are positioned so the cable shouldn’t have to twist when going to the lcds, but i have to verify that they’re not rotated. finally, the headers to the din/dout and aout chains are at the bottom right of the board.
Ultra, thank you for the snapshot. It is well packed and pretty dense so it should not take much space. 150x75 sounds nice! You want be using gate outs?
after talking to a couple people, i realize this can probably be used for other things like a control surface, and since that’s my next midibox, i’m adding the rest of the headers. i can do this without adding much real estate to the pcb. and btw, this pcb is also going to end up being pretty cheap.
i’ve added the rest of the i/o. every header on the core is available, as well as J4 for each IIC module (in addition to J4 out from the core). ignore some of the naming. i’ve been renaming everything to match the core/IIC schematic.
You’ll probably hate me for mentioning this but… You only need one J4 header, as IIC is a serial buss, so it just needs one header after the rest of the chain (banksticks and iic_midi)
BIG thanks for all your hard work on this! I know you’ve gone to great lengths to allow for everyone else’s desires (even if you didn’t need them) and it’s very kind of you!
You want be using gate outs?