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Author Topic: Wiimote questions for tablet/fretboard concept inspired by whaleboneir.com  (Read 2202 times)
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« on: July 16, 2012, 10:31:40 PM »

I was inspired by whaleboneir.com which makes IR pens and IR pointers for the Wiimote whiteboard hack, so I'm asking in this forum, because I have an idea sort of related to this project.

I was wondering at first if you could make a tablet (sort of like a bamboo tablet)  using a similar hack. The only difference would be the visuals would be displayed on a monitor instead of on your surface. So you would use the pen on a surface, but it would translate to motions that are seen on the monitor. Sounds totally feasible other than "why would you want to do that?", which leads to the real question that I have.

So I have this project that I was working on that is a sort of fretboard MIDI controller. Difficult to explain, but picture it as a bass guitar neck that has a row of IR LED's at the string positions at the nut, and a row of IR LED's along the neck indicating the fret. So when a string is pressed against a fret, conductors in the string, and fret would make a connection that would light up the IR LED's.  The Wiimote would interpret this as simple mouse positions right? So then you could feet this information into a software program like MAX/MSP as mouse clicks in certain positions. The hard part seems to be calibrating it, and calibrating it against the software, since you usually would calibrate to a position on the monitor, or projector screen. This is a bit different. So that's what I'm wondering.  Is this possible? I'm thinking for best results I would have the Wiimote mounted to the neck so that it stays in the same position. I would calibrate it as I would a white board, except for one additional LED to indicate the lower right corner of the fretboard (if you can picture this). Then it would send mouse clicks, or points (not sure about that either) to the software. I would then after some testing determine on the inteface where the mouse clicks would land on the monitor screen, and put buttons on the interface there, and let the software figure out what is exactly being played (one other advantage of this is keeping the logic on the computer).  Of course you would have different size screens, so perhaps I would need some calibration routine in the software to line up the clicks, or make the button grid resizable. Sounds feasible enough.
Please any support in this would be greatly appreaciated. Also please understand that I'm over simplifying my project, and that this is not just a Wii guitar project, it's something entirely different.
I'm really excited about the prospects because this would be a very simple solution to a problem that I'm finding overwhelmingly complex using a segmented fret design that I am trying to utilize using a USB keyboard hack.
I think I mainly need to know what the capabilities of the Wiimote are regarding this LED array concept.

PS - I wrote more about this in the musical projects topic, but there was no actiity there.

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« Reply #1 on: July 16, 2012, 10:44:35 PM »


For us non-musicians, a few diagrams/pictures or links may be helpful to see what you are doing.

There may be a simpler way to make your project work other than using the whiteboard method ....

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