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cimo

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Posts posted by cimo

  3. SID4all: DIY collective event

    in Miscellaneous

    Posted

    Yay!

    It started, although i am setting up a web page i ll give out some details cause all info is in Spanish.

    "Proximos" is a music, art and experimentation event that CoopAgricolaDrone , the colective I am part of, organizes every year around May.

    Last year we had a small Linux workshop and related activities but this year we finally brought the gear in and decided to organize a couple of electronic workshop.

    Yesterday we got 6 Casio mk10 for the circuit bending workshop, and saturday we open the inscriptions for the SID4all workshop where i ll lead a few guys to build their own SID box.

    Unfortunately due to lack of time and money i had to cut off the project and buy only 2 kits so we ll start with just 2 SID but we ll take in more inscriptions and organize a second batch whenever we ll get back the money from the gov (ugh!).

    We are asking for 25 euro for participating to the SID4all workshop, and the admission to the circuit bending workshop is free and you get away with the tuned casio.

    This is the page, still working on it but there is some info ..

    www.proximos.eu

    Simone

  5. Help! Confused About How to Connect Buttons

    in Parts Questions

    Posted

    Is an encoder a pot?

    no

    Anyway, I think I want buttons.

    that means you don t need any extra explanation right?

    So I'm confused because I have the smash DIN kit. Do I ground my buttons to the Vs of whatever jumper they are connected to via D-pin? Or do I ground my buttons to only 2 Vs pins as in the ucapps PDF, even though I have a different jumper layout? Or, yet another possibility, do I chain the ground terminals on ALL the buttons and touch it down to just one of the Vs pins, doesn't matter which. OR, yet ANOTHER possibility, do I chain the ground of every 8 buttons (grouped by the jumper they're connected to via D-pin) and touch that down to the Vs pin on the respective jumper?

    any of these would work

    Simone

  9. DOut over long (50-100m) cable?

    in Testing/Troubleshooting

    Posted

    What about this:

    fisrt you amplify a bit the signal out of DINs and DOUTs, a bc547 will do then in the projector room you build a matrix: 8 projectors x 2 switch each = 16 pins, that could be accomplisehd with a 4DINx4DOUT matrix, that makes 8 cables plus GND or V+. You need 9 cables that is a shielded 8 cores cable, cat6 LAN cable for example? Can t remember right now, or 2x 4cores cable.

    Simone (would this work?)

  10. Limits on distance between AIN/DIN and Core?

    in MIDIbox HUIs

    Posted

    Do you mean I need to power the AIN somehow, or just make sure I have a good power supply to the core? (10-12v, 500+mA or so, right?)

    both

    And as for coax cable on the analog part, is it the shielding that's important?

    it helps, a lot, if the connection will be "on the air" i mean outside a metal box then i d say it s mandatory for so long distances, also remember that it could work nicely in your lab and then give jitter in another situation, better to be on the safe side.

    The only coax I know if is a single conductor with a shielded jacket, and the AIN connects to the core through a ribbon cable (10-14 wires). Right?

    nop, AIN-CORE is only 5 cables.

    You can find coax with multicore

  11. TheRainbow - Midibox and RGB Led Keyboard

    in MIDIbox User Projects

    Posted

    Whatever, i just find it childish ok sorry let s say "odd" to say "I have great ideas but i won t share them, whatever the reason is.

    At this point i would ask you, will you share you new MIDIBox based project? Cause if not i am not willing to help you, nor will be most of the community.

    I do believe that all of the MIDI controllers company have an eye on MIDIBox, so what?

    Again, whatever do what you please and be welcome.

    Simone

  13. Saludos a todos, Tengo dudas con mi primer proyecto.

    in Español

    Posted

    Hola

    bienvenido

    pienso habras pedido a Sasha el permiso para utilizar su layout (??) si no obligatorio seria de buen gusto.

    los rectangulos rojos que estan entre las perillas y los botones son LCDs ?

    Aunque puedas empezar con una MB64 o MB64e para ver como funciona una MIDIBox como te aconsejo Alogic, estos dos poryectos no tienen las funcionalidades necesarias para tu proyecto.

    Si domina C podrias empezar todo de cero y crear tu propio codigo, de otra forma vas a necesitar de una MBLC para el SMPTE ademas te proporcionaria auto mapping para varios parametros (faders, los botones de 4 direcciones mas ENTER, que los tienes redundante en tu proyecto), los botones de transport, y otras cosas que tendras que ver por tu mismo.

    A la MBLC le anadiria un MB64E por lo de los encoders.

    Espero seas tan bueno con soldador y codigo como lo eres con photoshop porque es un buen proyecto bastante ambicioso

    Simone

  18. My latest "box"

    in MIDIbox of the Week

    Posted

    Thanks

    please stop PMing me asking for details about Lourdes ;)

    some other aspects of the dress, not MB related:

    as you can see she wears a kinda crown of tentacles, there are an iPhone and iPod attached on 2 of them with a movie of her mouth grinning and doing weird things as well as a vid of her eye.

    It s not so easy to see it but there is a rock (swing?) in the dress, she would sit on it, unlock the safety and jump all the way 6 meters high, on the other side of the swing we installed a 17 inches screen (together with over 40 kilos to balance her weight) connected to my laptop and a UPS source and we played the same video of her mouth

  19. My latest "box"

    in MIDIbox of the Week

    Posted

    Believe it or not this is my latest MIDIBox

    CandidataAdulta10.jpg

    I ve installed a 90A car battery in the dress (yes it goes on wheel), about 50 12 volts halogen lamps were installed in the "tentacles" of the dress, the lamps were divided in 24 groups, each group was wired to a power transistor 2n3055, each 2n3055 to a 2n2222 then into a DOUT pin.

    I used very basic C app that responded to MIDI notes sent by Ableton, i mixed the 3 minutes music for the show so i created a MIDI file/pattern to synch the lights with the music.

    To overcome the problem of having to start the MIDI file in Ableton at a given time (ie when the guys at the mixer started the music) i decided to go wireless with a Wiimote to start Ableton (via a little program called Osculator), another issue was to eventually adjust the lights to the music in case i didn t start it at the right time so i wrote a little PureData patch that let me use 2 buttons on the wiimote to speed up or down the tempo in Ableton.

    I also used PureData to prototype and "virtualize" the dress appearance before hand when it was not build yet, so i could start programming the lights.

    The sad note is that i got hold of lamps and transistor about 36 hours before the show so i had no the time to  wire them up correctly, that is although the lights were synchronised all the nice left to right up-down movements were lost for a more "randomized" effect, i hope i can get hold of some vid soon.

    Special thanks to Stryd (C advise), Nils (material forwarding), Lucem and Philtaylor (DOUT-power transistor circuit)... and TK! oh well and Lourdes who carried around the over 300 Kg carnival dress without a itch.

    Simone

    ..you can actually see me dressed in black, short sleeves in the left side background, holding the wiimote ;)

  20. Dance and video... uh there's music in it, it's kinda ontopic...

    in Miscellaneous

    Posted

    yep i ve used the reactivision setup with Pure Data. There is a theremin patch somewhere inside the source code.

    I don t think that a normal camera is the way to go as long as you don t want to spend hundreds of euro in a pro-camera.

    The wiimote camera has an in-built hardware blob tracker (up to 4 blobs) refreshing at 100Hz, what i can t really understand is how to deal with camera/projector, i think i need to dig some GEM patches

  21. Dance and video... uh there's music in it, it's kinda ontopic...

    in Miscellaneous

    Posted

    Well i was digging a bit more in depth cause me and a friend are going to work on similar project.

    A wiimote will do a nice job for object tracking at 100Hz, and the capacity of tracking up to 4 blobs simultaneously will give you the possibility of tracking the rotation of a body/object for example you could track hands and feet.

    With a couple of these

    http://cgi.ebay.de/3W-Infrared-IR-LED-Bulb-for-Torch-Sony-Nightshot-NEW_W0QQitemZ360131496892QQcmdZViewItemQQptZLH_DefaultDomain_77?hash=item360131496892&_trksid=p3286.c0.m14&_trkparms=72%3A1229|66%3A2|65%3A12|39%3A1|240%3A1318

    you would have enough for a room

    Since we get rid of the tracking via normal camera, a rather cheap camera could be used to get images of the bodies to be reproduced and manipulated, i wonder now what could happen because of the feedback loop created by the camera and the projector, i guess that the manipulation of the image should be enough to avoid unwanted artifacts.Any idea?

    Simone

  23. Hacking an M-Audio O2 controller

    in Miscellaneous

    Posted

    Quote

    It doesn t really make any sense to use a working MIDI keyboard keys to be retrofitted with a new controller...

    Without any rationale behind your reply, that doesn't add much to the conversation.

    Thanks, it probably doesn t add that much to you or to the conversation but for sure it takes my own time which i could spend somewhere else so please next time try something like

    "hey Simone you short answer doesn t really make sense to me please try to clarify your point"

    Now i see i ve misunderstood what you are trying to do, it was not clear in your first post, about the keys: you want to replace every key with a pushbutton, right? So basically this is not a MIDIBox project so this post should be in Miscellaneous

    In other words, if I can take a controller with 8 pots and a bunch of keys I don't need to use, and transform it into a controller with 8 or MORE pots and 25 BUTTONS, or some combination thereof, it would be more useful to me. I also want to do it with the parts I have and without programming

    Analog inputs can be used as digital inputs but not the other way round

    I noticed the two switches, that makes sense about the key velocity. I guess that means I can't use each of those contacts for a separate button, right? (Or possibly for velocity pads for percussion. . . .)

    no you can t use them separately and no you can t use them for drums, the double switch system needs a real mechanical movement of the key while drum triggers and pads usually use piezos to detect the vibration of the strike

    That said you could try to create some custom pad that would reuse the key mechanism somehow..

    There is also some code that calculates the time a button is pressed and transform it in velocity dig in the downloads

    About the pots: I see that the key contacts are actually two parts each, separated by a small space, so the key must close that circuit when it presses down and bridges that space. My thought was that I could bridge that space with a pot instead, but then I came to the main question of all this which was whether the signal would even go through correctly (since a note is just on/off, whereas the pot sends a variable voltage, and notes don't really have any variance included besides the velocity, which is taken care of by the dual-switch thing). Is my thinking correct so far?

    correct, i would advise you to get a clearer idea of digital and analog input as well as MIDI note on/off and cc, that would help you a lot in this hack

    Simone

    oops and yes i would definitely follow SLP advise

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