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Trapstate

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Posts posted by Trapstate

  1. Hoe gaat het met de Nederlandse midiboxen?

    in Nederlands

    Posted

    Staat bij mij ook een quad sid die qua hardware af is.

    Wil er nog mooie filters achter hangen en ben bezig met vfd display.

    Even wachten wat er met die aout optie gaat gebeuren.

    Waar haal je die VFD's vandaan als ik vragen mag? Prijs? IK heb zelf tot nu toe een mono SID module gebouwd, via de RS7000 aangestuurd. Ik was ook aan het denken om mn eigen filters te bouwen, maar die nieuwe MFB filterbox is toch ook wel heel interessant  ::)

  2. LCD inkopen

    in Nederlands

    Posted

    Beste mensen,

    Wie is er ook opzoek naar lcd displays voor zijn midibox. Ik ben opzoek naar 4 2x40 displays met blauwe backlight. Echter ik vind ze behoorlijk prijzig daarom zit ik te denken om een zooi van die dingen in te kopen. Is hier animo voor een soort inkoopaktie?

    Groeten,

    William

    Ik zou wel interesse hebben in VFD displays,

    Trap.

  5. MIDI naar parallel omzetten??

    in Nederlands

    Posted

    Pak de source code van de MIDI merger/monitor als voorbeeld, zo zie je hoe je MIDI kan ontvangen.

    De rest is vrij simpel: gewoon de ontvangen bytes naar een poort van de PIC kopieren. Als je nog nooit met een PIC gewerkt hebt, probeer dan eerst eens iets simpels zoals het laten knipperen van een ledje ofzo.

    Ik heb zelf ooit MIDI verstuurd met een PIC. Op het net kan je nog andere projecten vinden die dit ook goed beschrijven.

    suc6  

  8. bootstrap loader en verder

    in Nederlands

    Posted

    Ja. Eerst brand je de bootstrap met JMD. Daarna plaats je de pic in de core en kan je m.b.v MIDI-OX  MIOS laden (die main.sys dus). Tenslotte moet je nog via MIDI-OX de applicatie laden (volgens mij binnen 2 seconden na powerup van de core), in dit geval dus de midibox sid.

    Trap.

  10. Midi and Director

    in Design Concepts

    Posted

    As long as we're talking about midi and video:

    I've been experimenting a while now with video and MIDI. Up to now mostly with hardware, but I want to *generate* more sophisticated video from MIDI as well. I've been looking for a good environment to do simple 3d graphics. I guess it will come down to some hardcore OpenGL programming, or not? Does anybopdy know a good environment?  Any tips or links for tutorials?

    thnx

    Trap.

  11. MIDIbox of the week (Mini MIDIbox SID of Trapstate)

    in MIDIbox of the Week

    Posted

    *BIG* Thnx for the compliment! (btw... ... nope, no trade   )

    Damn, well at least I tried :)

    Will try that laquer technique with MBSeq (won´t the photo laquer more be like violette than black?)! Thnx!

    Not really AFAIK, but I'll ask somebody who's done this alot. I'm also looking for other techniques to make really detailed and high quality prints for cases. The "SID vicious" print on top is actually a sticker cut out by a cut-plotter, combing several plotted stickers could also be interesting with this etching.  

    Now that AVU RX starts to make sense...
     

    AVU stands for Africal Virtual University, apparently this little box was meant for video conferencing in a project to stimulate education in africa. I guess it never got to it, instead it became a SId synth :D

  12. MIDIbox of the week (Mini MIDIbox SID of Trapstate)

    in MIDIbox of the Week

    Posted

    Thnx guys!! And I like yours better Pay_C, wanna trade?? ;)  To answer your questions:

    I did not make this frontpanel! In fact the front panel looked like this when I bought this housing at a dump shop (for only 2 euros ;D). It used to be a satellite demodulater,  I just replaced two BNC connectors for 6,3 mm Jacks and voila: it had SID vicious written al over it!!

    However, I have made some similar panels in the past. Basically it's the same procedure as for making printed circuit boards: you take your blank (aluminium) panel and paint it partly (or completely) with photo laquer. Than you print out your design on overhead sheet or chalk paper and devellop the photo sensitive laquer with UV light. What was black on your print remains. When finished you should protect the panel with blank laquer or folie..

    What looks like my MIDI-out on this picture is actually my MIDI-in  :) The red LED is DC (power) and the two blue ones are MIDI in and out. I don't have pictures of the inside yet, only one more from a higher angle. To save space on this server I'll put them on my site with some of my other uC projects soon.  

    Trap.

  13. SID: popping sound when changing patch

    in Testing/Troubleshooting

    Posted

    Hi all,

    For some time now I've been using my mono "SID Vicious" which is just great. However, I do have one problem: when changing a patch I hear a loud 'Plop" sound. Ofcourse this can be expected because all parameters are updated, but the plop is so loud I really have to be carefull   :-/

    I think it's my combination of SID version (MOS 6581 3984) and capacitors (WIMA 470nF ceramic). Did anyone have this problem before? what's a good combo for SID version and caps for a low plop sound?

    Thanks,

    Trap.

  18. Touch sensor questions

    in Design Concepts

    Posted

    If I remember correctly, they are not *that* expensive, and the matrix version is surely not.  How many sensors do you want to make?

    As for the sensitivity: yes you can trigger them without contact (that's what they're designed for). With a sheet of copper foil I managed to trigger them from 15-20 cm. But if you reduce the surface and configure the ic's differently, the distance gets smaller.

    The picture is the construction of a lamp, only 3 high power leds burn at once, and the height can be adjusted by moving the hand over the back. In this case the tiny metal plates were covered with non-conductive paint, but still the sensors trigger when moving the hand over the back of the lamp. See this picture to get an idea of the lamp:

    http://www.putzi.nl/pics/3leds_active.jpg

     

  20. Touch sensor questions

    in Design Concepts

    Posted

    Wilba, maybe this is interesting for you:

    http://www.qprox.com/downloads/datasheets/qt113_102.pdf

    These small IC's measure the capacitance between a small conductive plate and your hand, and thus also the capacitance to ground. Sensitivity is depends on configurantion, size of the metal plate and the overlap of your hand. See this picture to get an idea, the small boards on the right are the sensors:

    www.putzi.nl/pics/0070.jpg

    Output is TTL (well, more or less), so directy usable in digital logic. They also have a matrix module  (only smd afaik), maybe also worth to check out.  

    Good luck,

    trapstate

  21. Problem with core and single SID

    in Testing/Troubleshooting

    Posted

    Thanks a million Thorsten!!! Finally my SID has come to life, and now it is making some beautifull sounds!!!

    Turned out to be a short between two HC595 pins, the short was hardly visible but your tip on RES# indicated that it had to be there somewhere. With the smallest timebase (on my older scope) I could just barely see the RCLK, so this was ok. Tracing the signals and the aid of HC595 datasheets lead to the cause of my problems.

    Now only some example patches won't play, like c64 bass and 6581 filtered bass. I suspect the that LowPass filter over OSC1 is not working, the 470nF capacitors look ok so maybe this filter of the SID is fried. I also hear a loud 'plop' sound when changing patches. I guess it's normal, but maybe this is caused by the faulty filter section??

    Again, thanks a lot! When I finished it I'll send you a picture! Now I can go back to what I like most: make music :D      

    Trapstate

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