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  1. midiphy Eurorack Expander Modules

    Hello, Peter made an awesome video (4k quality!) demonstrating the assembly of the following modules Euroceiver (line driver receiver in the rack), power distribution A1 Expander (AOUT based on MAX5500) D1 Expander (DOUTX1 for gates plus protection) D2/D3 Expanders (likewise for clocks and triggers) Feel free to use this thread for any discussion or troubleshooting. Have fun building your modules!     
  2. Lately I've been trying to use the extra functions of the CV-Gate out, specifically the possibility to send velocity with key values. From the manual: When I use AOUT - channel 9 I get key and velocity from the first two CV's out, as expected. But only gate #1 is triggering. When I switch to AOUT - channel 10, I get key and velocity from the second pair of CV's out: 3 and 4. And gate #2 is firing. What I expect is when I use AOUT - channel 9, is to get CV's from 1 and 2, and gates on #1 and #2. This is consistent through the whole range of outputs. All the other functions work exactly as expected, the drum gates and the clocks nothing wrong. I found this advise: And I've scanned through the entire config, but pretty much everything is standard. I use the Wilba Front panel with the AOUT-NG with the DOUT. Here is my HW-V4: Am I making a mistake assiging SR's? Or is it something else I'm missing?   Thanks!    
  3. Hello, I was looking for a simple stereo solution for a noise gate to reduce noise of a pair of SID 6581. I know, that is a common thread already here: ... but, there are some limitations for me. For example, it is not soooo easy to get all the parts or transistors must matched (!) and so I was more looking for a rather simple smart solution. So I found the following: which looks very simple. But the author mentioned: Would that be ok for the SID 6581? Or is there something against the solution or would the output voltage of the SID be too high for that? Greetings, rio
  4. driving Solenoid

    the concept is to control acoustic drum...or anything else I see some people asking on uCApps forum to drive solenoid from a core module. the problem is solenoid need a fixed timing to have the proper action! whith MBseq or a software you could control the lenght (decay) but you've got to redefine at each note the good value and if you change BPM the parameter change (stretching).   to have the desired fixed timing two solution:   -edit the log (too hard for me)   -fixed circuit: at the output pins of a DOUT 74hc595 you plug this circuit: R is a pot Time=1.1xRxC with a TIP122 at the output of the NE555 (1k resistor between)   I build 8 of this circuit for a DOUT for a special project and it rocks! next step is the roll action: one solenoid haven't the possibility to roll a snare the concept is to use 2 (or more) solenoids on the sna from one DOUT output! the trick is to use a CD4017 clocked by the DOUT output and configured for the number of solenoid (like analog seq). to do  
  5. SEQ V4 Line driver break out CV

    Hi Midiboxers, Line driver breakout CV /gates finished i used AOUT and a tweeked DOUTx4 and of course the line driver receiver! DOUTx4 is stuffed with regular 220 ohm resistors for leds indicators and UDN2981 for gate booster. UDN 2981 are directly linked at the outputs of 74hc595 (before the 220ohm resistors) . the gates assigned to CV have two UDN 2981 (input in parallel)  one is powered by 5V (eurorack 5V gates) and go to minijacks and the second is powered by 12V and go to 1/4jacks (oldschool 12V modular gates) same for the extra drum triggers gates:  8 are in 12V and the last 8 are in 5V... need 1k resistor at each outputs of UDN for ground short protection !!!! 3 PSU inside:  12V  for 12V gates, 5V one for the 5V gates /line driver receiver/DOUT/AOUT and bipolar 12V for AOUT. the 5V line from the seq is cut on the receiver. i could have used the same 12V from bipolar but a dedicated 12v make sense cause wanted the AOUT "stability" as usual i've got a  bug :  the CV 1 and 2 have the same problem:  at calibration voltage are divided by 2... don't know why...not the ICs , no shorts, ( problem on the 2 first channel!) all other 6 channel working properly. the calibration "max" voltage is 4V on this two channel is it possible to be a log error? i build AOUT because i've got max525 in stock...  is someone use this config and could confirm that line driver work with AOUT?  
  6. Hi,   My name is Ruben (from holland) and i'm completely new to the forum. I've just finished my first midibox seq v4 with wilba's panel. So far it's all working. But I'd really like to use 8xCV and 8xGATE.   I have built my unit using te LPC17 and the AOUT_NG and as i understand it, i also need the DOUT for the gates.   questions:   1) is this the schematic i want for setting up the 8 gates? Or can i wire the gates somehow directly to the core board?   2) i also need some help under standing what i need to change in MBSEQ_HW.V4, could somebody tell me exactly what needs to be in the part copied under here, to get 8 cv' and 8 gates working? the AOUT_NG page states the following:    "First edit the config file on the SD Card to use the AOUT_NG (i.e. #define AOUT_INTERFACE_TYPE 3) and save it !"   But if there's a hashtag before define then the whole line is commented out right? so should i strip the #define? if so, then why is it there?   This is the CV part copied from the .V4 file, could someone help me?   Cheers,   Ruben       ################################################## # CV and Gate/Trigger/Sync Setup ##################################################   # AOUT interface now selected in CV Configuration Menu and stored in MBSEQ_CV.V4 file # please scroll through the menu to find this page!   # the 8 CV gates can be assigned to a shift register (0=off, 1-32: number of shift register): # - 1st CV Gate available at DOUT SR output D7 # - 2nd CV Gate available at DOUT SR output D6 # - 3rd CV Gate available at DOUT SR output D5 # - ... # - 8th CV Gate available at DOUT SR output D0 CV_GATE_SR1   0   # and DIN Clock Outputs can be assigned to a shift register as well (0=off, 1-32: number of shift register): # D7..D0 will output individual clock or start/stop signals which can be configured in the CV configuration page CLK_SR        0   # additional gate triggers are available on common digital output pins of the # DOUT shift register chain - they are assigned to AOUT channel #16 (Note C-1, C#1, D-1, ...) # define the shift registers which should be used here (each provides 8 gates) # Note that SRs assigned to this function cannot be used as LED outputs (exclusive function) # Allowed values: 1-32, 0 disables the function, all other values invalid and not allowed DOUT_GATE_SR1   0 DOUT_GATE_SR2   0 DOUT_GATE_SR3   0 DOUT_GATE_SR4   0 DOUT_GATE_SR5   0 DOUT_GATE_SR6   0 DOUT_GATE_SR7   0 DOUT_GATE_SR8   0   # if set to 1, the DOUT "gates" will send 1mS pulses # useful for analog drums DOUT_1MS_TRIGGER 0   # should J5A/B/C outputs be enabled (0: no, 1: yes, 2: yes, but in open drain mode)? #  - the 6 first AOUT gates will be forwarded to J5A/B #  - the remaining last 2 AOUT gates are available at J5C.A10 and J5C.A11 (LPC17: J28.WS and J28.MCLK) #  - DIN sync clock will be forwarded to J5C:A0 (LPC17: J28.SDA) #  - DIN sync start/stop will be forwarded to J5C:A1 (LPC17: J28.SC) #  - if open drain mode enabled (option 2), external pull-ups have to be connected to J5 pins #    (advantage: pin levels can be pulled to 5V) # # NEVER USE THIS TOGETHER WITH ANALOG POTS - IT WILL CAUSE A SHORT CIRCUIT! J5_ENABLED 1
  7. Hi guys! I've just started testing of my first MIDIbox as a complete set, configured for midi2CV application. It's based on LPC17 core; aout_ng used for CV output. Currently it's running under Midibox_ng_v1_032 and configured for high-resolution CV. CV output is okay, however I encountered a problem with gate. There is no signal at DOUT ch. 1 through 7 upon key pressure. Sure, fwd_gate_to_dout_pin... command is applied in configuration file. I checked j8/9-DOUT connection twice - it seems to be ok (according to diagram). I see that "DOUT off" when I press shift and "all DOUT pins inactivated" when pressing button #3 on SCS. Is it the reason why gate doesn't work? I can't activate DOUT using SCS. Please, advise how to fix that.   PS: Sorry, posted here by mistake. This topic should be moved to Testing/Troubleshooting
  8. MBHP Control Volt V1

    From the album Antix MidiBox SID

    Almost finished
  9. MBHP Control Volt V1

    From the album Antix MidiBox SID

    Probably a better focus
  10. SEQ's max CV I/O capability?

    Heyo! After lots of thinking, I've decided to build a SEQ to become the navigation system for my spaceship. I've become hopelessly addicted to modular, and am curious if someone who use's their SEQ in a similar capacity could comment.    Question one, whats the max output of analog info? 8 cv, trigger, and gate? Is more possible?    Question two, can the SEQ interpret incoming cv? For instance, can I clock the SEQ from a simple trig out of my modular?    Thanks much for the help!