robotfunk

amazing work! especially considering the weather :sweat:

One mistake I made was ordering the wrong type of resistor network, there are two types, you need the type where there is resistance between pin 1 and all other pins. The one I had used had resistance between pin 1 and 2, 3 and 4 etc, WRONG you should be able to measure this easily on the backside of the PCB.

Managed to get it working thanks to vcfool in the chat, needed to choose the in1 port in transposer and arp, to be able to record, hadnt' thought of looking for it there... woop!

Got my barebones sequencer working this week, spending all my days learning this thing, great fun so far! One thing that isn't working for me is the Record page, whatever I try I don't seem to be recording anything from MIDI, realtime or not. Got a MIDI keyboard into MIDI in port 1, and I see activity in the MIDI Monitor page, but can't seem to record it. Could be a user error though, but I assumed you could just play MIDI and it would be recorded in this page. Also looking at dumps in MIOS Studio (juce beta 5) I noticed my SD card does not have the file MBSEQ_G.V4, don't know if that could be related? Otherwise, wow, I'm going to be lost in this thing for a while :)

Yeah I've had that idea too, but do you really believe you will get an aluminium enclosure for that money? My bet is on plastic.

Now I'm planning a proper, sweet case for this one, because it deserves it... But patience is not a specialty of mine and having finished the electronics I needed something to keep it all together, so I could play with it so here is my temporary ghetto box : I'm having a wicked time exploring this beast, this thing is DEEP! thanks Thorsten for making this and everyone who helped me to get it working, now excuse me I'm off to play!

YAY! Got it working :sorcerer: ssp suggested I needed to use the INNER on J2 and the OUTER on J1 now all buttons and encoders on the first 2 DINS are working yay I got a brand new toy :drool: thanks everyone for helping out

OK, I got a tiny bit further with this. Nils was so kind as to compile a very helpful oneliner of code which tests the DIN inputs, and managed to fix all SR's on both DIN boards. Now it gets weirder.. All SR's on both DINs tested OK, all my encoder and button boards tested OK, but when I load the Seq V4 app, nothing on the second DIN board gets recognized. It does not matter in which order I put the DIN boards. I've checked the J1 and J2 connections to board (from pin to solder) and I've checked the cables. They all seem fine. I'm using the outermost 5 pins on each DIN board for interconnection, as suggested by many. anyone have a clue what could be going on?

Yes, I only connected every default input on the first 2 DIN boards, as I don't have more (I have a few old one from Mike, I'll try and get one of those working..) I tried to put a modified MBSEQ_HW.V4 file on the SD Card that moved some non working inputs to different shift registers but that didn't seem to get loaded (I was triggering the same functions as before). I can't 'format' the SD card in the Midibox yet because my GP1-8 buttons aren't working yet... I tried the terminator but that didn't change anything either...

well the leds haven't been connected yet so they won't consume power :) I've just soldered the power section, works, issues remain. Could it be a problem that I'm using only 2 DIN boards and the default config uses 3?

I've been building a Midibox Sequencer v4 bit by bit, and so far have A finished core32 minus the power supply 2 DIN boards from SmashTV connected to the default buttons/encoders described in http://ucapps.de/midibox_seq/mbseq_v4_din.pdf 2 LCD screens no SD card no DOUT or LEDs jumpers set for usb power and for 5V to DIN chain I'm having trouble with some inputs, I've inspected all my joints and connections, swapped DIN boards and shift registers... still can't get everything to work here is what is working and what isn't Datawheel Works as expected Scrub Works as expected Metronome Works as expected Stop Works as expected Pause Works as expected Play Works as expected Rew Works as expected Fwd Works as expected F1 Works, but I can't seem to get back to the default screen F2 Works as expected F3 Works as expected F4 Works as expected Menu Works as expected Select Works as expected Exit Works as expected Track 1 Works as expected Track 2 Works as expected Track 3 Works as expected Track 4 Works as expected Layer A Works as expected Layer B No visible reaction Layer C No visible reaction Edit No visible reaction Mute Works as expected, but the gp buttons don't work Pattern No visible reaction Song Works as expected Solo No visible reaction Fast No visible reaction All No visible reaction Encoder 1-8 Works as expected GP Button 1-8 No visible reaction with menu or mute Encoder 9-12 No visible reaction also sometimes the lcd screen throws a few random characters after pressing some buttons. There must be a short or something but I can't seem to find it. Could there be something wrong on the Core32 or in a place I haven't thought of yet?

Got my knobs in the mail today, with an extra discount, and quick shipping, thanks Raphaël !

yeah that's what I ended up doing. Not a fun job. Still I don't seem to have ruined it, got it lighting up and displaying text connected to the core, albeit garbled nonsense :) investigating further...

DOH! I soldered the connectors on the LCD side, thinking that would be 'component side' prepare for more n00b comedy from this end

Hi, so I got a nice parcel from Hong Kong yesterday, with my two lovely looking blue 40x2 LCD screens ( from http://cgi.ebay.com/40X2-Character-LCD-Module-Module-LCM-HD44780_W0QQitemZ190337762891QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item2c5103c64b ) and I notice it has solder holes spaced for a nice IDC header, so no soldering to the LCD needed, great! so I start crimping me some cables and look at the data sheet, compare it to the core32 and it matched perfectly, well almost :) it seems that the pins are in the right order, but flipped vertically. I thought I could fix it by rotating a cable header, but that didn't work out however I tried. Now I've got some helpful hints in the chat how to fix this, but it involves crimp pins and tool which I don't have, and I think I have an idea how to McGyver something ugly to fix it, but before I go to all the effort, I wonder, is it really flipped? Am I not overlooking something obvious? Interpreting the datasheet wrongly perhaps? Here is the datasheet with pinout by the way: And if I'm right and I do have to hack something together, does anyone brighter than me have a clever idea that does not involve manually swapping every 2nd cable in a ribbon cable, or require 8 parts like the kludge I had in mind and still have to test? any ideas much appreciated

Hi, if it's not to early to express interest, I am interested in the following: - about 1000 knobs for potentiometers with D shape lever type (ref SIFAM 3/02/DRN110 006) Price : 3€ for 10 units 50 units please - about 1000 knobs for potentiometers/encoders with D shape lever type (ref SIFAM DR150 006) no line on these knobs ! Price : 2€ for 10 units 50 units please - about 200 knobs for potentiometers/encoders with D shape lever type (ref SIFAM DCK150 006) no line on these knobs ! Price : 2€ for 10 units 50 units please

probably true, just saw some schematic the other day (I think by Buchla or Wiard) that used a bargraph LED driver and some vactrols as an optical mixer, the vactrols were used to deal with the zipper noise.

If zipper noise should be a problem, perhaps an idea would be to add some vactrols (optocouplers) after D/A ?

Hi Thorsten, thanks for your quick reply! you seem to have elephant memory ;) Even though my soldering has improved a lot in the last 10 years, I'm still uncertain I'll manage to solder SMT, so I think I'll spend a bit more and go for the original AOUT. One step at a time though, gonna finish the core first, thanks again. Jilt

Hi all, after years of procrastinating planning, I finally started to build my Midibox SEQ V4, starting with the CORE32 board. First of all let me compliment Thorsten and SmashTV, the step by step build / test instructions are very helpful so far and the PCB oozes quality. I just got MIOS studio talking to the core, w00t! Now my question, I'm planning to use this mainly to control my Eurorack modular synth and I was aiming to use CV rather than MIDI if possible. Now in the build document I read that the CORE32 can't deliver more than 3.3V to AOUT, I swear I see this for the first time, although in hindsight, it's rather obvious that you can't output more than goes in.. Now ideally I'd like to multiply this voltage by 3 to arrive at nearly 10V which seems to be the most common analog standard for pitch CV. I think I'm gonna need at least 5V for the gates/triggers as well. How to go about this? I'm figuring some opamps and an external +/- power supply, after reading http://www.acroname.com/robotics/info/articles/interface/interface.html . Now most circuits I've seen with opamps are really attenuators rather than real amplifiers, so I'm wondering if anyone else has an idea how to go about this. Since my modular already has a +/- 12V power supply, perhaps I could build a 'breakout euro module' that is housed inside the modular, not sure if noise is going to be an issue though. Any hints would be much appreciated, Jilt

For the Midibox SEQ I'm planning to build I'd really like to have the choice of using it on the desktop, but being able to rackmount it as well in 3U height. http://www.schneidersbuero.de/index.php?sect=products&lang=en&product=MFB%20Frame%20Module%203%20HE&hersteller=MFB&kategorie=hersteller&currency=EURO_BRUTTO is close, but a bit deep for desktop use. Has anyone found a case that would be suitable? Or rather just the angled side panels? I've found a cheap source for all the other parts ( www.supermoduul.nl )

then I hope you have tiny fingers ;)

ordered ... have been waiting for this moment since early this year ... excited :)

wow that is excellent news! going to order straight away