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freddy

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Posts posted by freddy

  2. MB6582 CS PCB

    in Parts Questions

    Posted

    When I was trying to get the same (i.e. CS MB6582 board only, because I had to re-solder the encoders three times and PCB traces started lifting up) he answered with an 'yes', so I'm pretty sure it's still the case, just be patient for him to answer.

     

    Hope this helps,

    freddy

  3. MIDIbox SEQ Aluminium Desktop Case

    in Bulk Orders

    Posted

    i finished my midibox seq v4 a while ago and i'm still missing a case.

     

    Anyone who is interrested in ordering a Midibox SEQ V4 case big enough to fit the LPC board from Heidenreich?

    If there are enough people (>10) I will agree to setup/manage a new bulk order.

    Count me in for two, please. Not sure if the new dimensions were measured already, though.

  5. dacs

    in Parts Archive

    Posted

    <blockquote class='ipsBlockquote'data-author="pilo" data-cid="160759" data-time="1384424215"><p>

    I use this DAC for an ADAT converter:</blockquote>

    ADAT? This is about DACs but did you also build the full 8ch I/O from/to ADAT to/from analogue? If so, any chance for the schems? That'd be exactly what I'm looking for in a DIY format, not expensive commercial products...

    Cheers,

    freddy

  6. Encoders in DIN Matrix?

    in MIDIbox NG

    Posted

    Well, correct me if I'm wong but you can always treat DIO_MATRIX as 2xDIN and 2xDOUT, matrix is just for convenience use in a single connector and on a single module. The schems seem to confirm this. Just make sure you do the DIN/DOUT SR counting properly ;)

  10. Motorized Pots on an MB-808?

    in Design Concepts

    Posted

    Thanks for the shower, too ;) but I was thinking basically about a different MB device (assuming the digital controls are more or less already MIDI controllable already). My prototype for MBMixer was a simple Core 8 accepting the CCs plus a bunch of DOUTs to controll the AD digipots. The digipots will simply replace current pots and faders. It kinda makes sense to keep it separate because one part is the SEQ to control the MB808 and another thing (i. e. device) is to control the voice tunes. You can always link it internally using merger and splitter to "look" like a single device. Of course, I didn't consider merging the existing FW to handle both parts which would imply requirement of an additional SCS for the tunes, if needed/wanted.

  17. Control surface PCB for 16 encoders/LEDrings Bulk Order

    in Bulk Orders

    Posted · Edited by freddy

    Even though it is James' first post he has been a registered user here since 09, which would make it the oldest "sleeper" spam account I have seen here.......

     

    Tim,

     

    I'm afraid I'm holding this very questionable record - joined in 2003 and first post in 2011, I've been a silent lurker otherwise, at least as per the forum history...  :rolleyes:

    • Like 1

  18. [S] TPD (Track Position Display) PCBs for sale

    in Fleamarket

    Posted

    For reference (and the shopping cart later on) - which LED matrix modules do you recommend, ilmenator?

    Thanks & many greets,

    Peter

     

    Peter,

     

    I'm about to try these, they look like common cathode if I read the internal diagram correctly, though. Next week I'll fetch them and solder them when the board arrives. A supplier in my home country has them for 6,73 â‚¬ (incl VAT) but I won't be at home before the following Thursday (ilmenator will be posting the boards later, anyway). I'll keep you updated, if interested.

  20. Cleaning your Boards

    in Tips & Tricks

    Posted

    No kidding, Marxon, even in Conrad the price is 12E for 400ml, 8.68E for 200ml, I just bought one this week :-) And, in case you can't find it, in Germany it's called 'LR' (Leiterplattenreiniger) instead of 'PCC' (Printed Circuit board Cleaner). +1 to recommend!

  21. sammichFM CS not working

    in Testing/Troubleshooting

    Posted

    nILS, guys,

     

    - you've got the wrong firmware (it happens, simply upload the latest MIOS and then the latest sammichFM firmware to be on the safe side)

    - you have the 165s and 595s mixed up

    - you installed the resistor networks the wrong way around (make sure the dot on the network aligns with the dot on the silkscreen)

     

    none of it, actually, I found a big(ger than it should be) blob of solder on on IC1 pin 3 (causing a short to Vcc) :no: Removing it helped, obviously  :rolleyes:

     

    Thanks anyway, cheers!

  22. sammichFM CS not working

    in Testing/Troubleshooting

    Posted · Edited by freddy

    Guys,

     

    I've build (excellently documented, BTW!) and tested both sammichFM PCBs and had no issue at all - no shorts, all voltages correct, powers up and works, i.e. I was able to upload firmware (the correct one before you ask), upload presets, play tunes from remote keyboard. The only issue is the CS - no LEDs lit, no enc/button works (apart from S3 which sends patch SysEx). I've measured HC165 and HC595 voltages, tested the paths from J8/J9 to the chips, paths from chips to LEDs, all seems okay but the HC595 outputs are all set to 0V. I'll measure the DIN matrix connections tomorrow if needed but this seems to be a general CS issue to me...

     

    What else to look at? Anything to measure? I'm quite clueless at this moment  :no:

     

    Looking forward! Cheers,

    freddy

  23. SOLD FS: sammichFM kit

    in Fleamarket

    Posted · Edited by freddy

    Thanks, Frank :rolleyes: Honestly, this really came like a thunder out of a clear sky - exactly what I was looking for, with excellent terms and really quick, I couldn't wish for more. I'm really looking forward to the time spent constructing this beauty and playing with it  :rolleyes:

     

    Thanks again!

  24. MIDI Out to multiple MIDI Ins

    in Design Concepts

    Posted

    You can't use a DOUT pin to output MIDI data.

    My proposal for such a setup would be, to connect a TTL based MIDI Output (e.g. J4B.SD) with the Rx pins of the BassBoys in parallel.

    The grounds have to be connected as well (e.g. via J4B.Vs)

    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.

     

    Now each synth will receive the same MIDI data, but you are able to differ between the synth by using different MIDI channels.

    If SysEx data is transmitted as well, then I hope that BassBoy supports a Device ID?

    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

  25. MIDI Out to multiple MIDI Ins

    in Design Concepts

    Posted

    TK,

     

    thanks for the reply'

     

    Hi Freddy,

     

    you need a dedicated driver for each pin which drives the optocoupler of a MIDI IN (in fact: the inbuilt LED of an optocoupler).

    A 74HCT541 could be used for such a purpose - it would allow you to drive up to 8 MIDI INs

     

    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

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