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goyousalukis

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Posts posted by goyousalukis

  1. Moded MB (schematics inside)

    in Design Concepts

    Posted

    I'm sure Thorsten will correct me if I'm wrong, but I don't think you should use the Core PCB to build this circuit. It appears as if it could be done, but looking at the schematics for the core module, I don't think it would be wise. You would have to tie some pins to +5 and to gnd that are different than the core. Also, pins 31 and 32 would have to be modified for the capacitors. Your modified schematic is simple enough that I would just build it on a vector board with solder pads. It should be small enough for your purpose I'd think.

    Justin

  2. Keyboard mod :)

    in Parts Questions

    Posted

    Hi William, I don't know how you would like this, but I bought an old analog apple joystick for $2 US at a flea market. I had to rewire the pots, but it works great. A cool feature it has is that with a switch, you can change between self-centering or not, so you can have the pitch bend axis spring loaded, but the modulation not. Well, good luck...

    Justin

    Oh, If you need regular wheels, I think you would have to look for a trashed keyboard to buy cheap and take them, although you could just use a regular fader for the modulation.

  4. how can I build something like this?

    in Design Concepts

    Posted

    Cyclops, I think the easiest would be to build a midibox plus 8 - which gives you up to 8 buttons and 8 knobs. Just hook up only one button. You wouldn't need a display, just a midi in and a midi out. You would have to set it up with sysex, but that is easy with Serge's editor. It would also be easy to use a footswitch, so long as it is normally in the open position. Just mount a 1/4" socket. Good Luck...

    Justin

  8. what voltage of capacitor ??

    in Parts Questions

    Posted

    Hopefully one of the smart guys here will jump on and correct me if I am wrong. From what I have observed, as the voltage goes up, so does the size of the capacitor. I used a 35v one for the 2200uf and a 25v for the 10uf on my midibox16 - I wouldn't go bigger than that, allthough I think you can go smaller. I would assume that as long as the voltage of the capacitor is more than the voltage of the power supply - you would be good.

    Justin

  9. what voltage of capacitor ??

    in Parts Questions

    Posted

    Hopefully one of the smart guys here will jump on and correct me if I am wrong. From what I have observed, as the voltage goes up, so does the size of the capacitor. I used a 35v one for the 2200uf and a 25v for the 10uf on my midibox16 - I wouldn't go bigger than that, allthough I think you can go smaller. I would assume that as long as the voltage of the capacitor is more than the voltage of the power supply - you would be good.

    Justin

  10. MIDIbox8 to COM....

    in Parts Questions

    Posted

    If I understand the question, you want to have MIDI in and Out Ports AND a COM port? I don't think this is possible:

    (only one driver is allowed for the Rx Input of the PIC, either the 6N138, or the MAX232, or a second Core module)

    (from the LTC Module descrition page)

    If you really need this, I think you would have to use another CORE as a MidiMerger. Hope this helps.

    Justin

    As an afterthought - if you need both, but not at the same time, you could make them both and then put a switch on pins 25 & 26 to choose which interface is active.

  11. MIDIbox8 to COM....

    in Parts Questions

    Posted

    If I understand the question, you want to have MIDI in and Out Ports AND a COM port? I don't think this is possible:

    (only one driver is allowed for the Rx Input of the PIC, either the 6N138, or the MAX232, or a second Core module)

    (from the LTC Module descrition page)

    If you really need this, I think you would have to use another CORE as a MidiMerger. Hope this helps.

    Justin

    As an afterthought - if you need both, but not at the same time, you could make them both and then put a switch on pins 25 & 26 to choose which interface is active.

  12. 1,000 4.7K Lin Potentiometers

    in Parts Questions

    Posted

    While we're on the subject, I recently hooked up an apple analog joystick that I got at a flea market for $1. It has 100k pots. I tried to fit my 10k pots, but there were too many problems so I just tried the 100k's and it seems to work fine. Does anyone know if there is a potential problem with this?

    Justin

  14. MB64 SEQ Sync Question

    in Design Concepts

    Posted

    Hello, I searched the message board and the website, but I couldn't find the answer to this question:

    Does the MB64 Secuencer respond to or generate any sync signals? I plan on upgrading my MB16 and want to be able to sync it with various sequencer software.

    Thanks!

    Justin

  15. Clean Fader Slots

    in Tips & Tricks

    Posted

    Hello everyone, I want to ask for any tips or tricks for cutting clean - nice looking slots for faders in panels. I have experimented, but haven't had much luck. I don't have much of a shop, just a drill press. Any suggestions?

    Justin

  16. a few questions from a newbie

    in Parts Questions

    Posted

    Oozi, I stand corrected! I just went back to the website and noticed that kits are available at www.chris-elektronikseite.de . It appears as if all the components are already installed. You would only need basic soldering skills to connect the Pots, Faders, LEDs, and LCD to the modules. You would also need a power supply and some way of programming the PIC.

    Justin

  17. a few questions from a newbie

    in Parts Questions

    Posted

    - if i were to order the neccessary MBHP modules from www.mikes-elektronikseite.de i'd have everything except the buttons, pots, leds, LCD & case. how much would the rest cost me? average quality materials, excluding case.

    - how much work would i have to do to fit together the modules from www.mikes-elektronikseite.de? and do they come completely assembled?

    Oozi - the modules from www.mikes-elektronikseite.de are ONLY the printed circuit boards. They are not kits with all the necessary parts. You will still need to buy the PIC, and all the resistors, capacitors, IC's etc.  You will also need some method of programming the PIC. On the other hand, this project can be done by a beginner - especially if you purchase the printed circuit boards. Some practice in soldering will be neccessary, and I would highly recommend purchasing a digital multimeter to check voltages and checking the circuits.

    i'm not quite clear on the function of the LTC module

    The LTC module gives you leds for Midi In and out Activity. It also gives you a Midi thru port, an extra Midi out port and (if you need it) a COM port interface for a direct connection to your computer. It doesn't change the way you program the module. You can always program it with SYSEX.

    makes me wish i knew a bit more about elektronix...

    if you build this project, you will learn!

    Good Luck...

    Justin

  19. Hanging Notes

    in Testing/Troubleshooting

    Posted

    Hello, I hope someone can help me. I have built the midibox 16, and it works great - except for one thing: when I use it between my software analog sequencer emulator and my synth module, I often get hanging notes, as if the noteoff midi message got deleted. This happens when I make rapid movements on two of the sliders I use - specifically for the filter resonance and frequency. Is there a fix for this? Is there anything I can check? Thanks for any help...

    Justin

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