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Messages - silkcom

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IR Pens / Pressure sensative "real" IR pen
« on: February 27, 2008, 02:58:48 PM »
Ok, this is an idea that i've been thinking about lately, and finally came up with a cheap and easy solution.  The result is an IR pen that is on while you're writing and off while you're not.  It uses the spring inside a pen to push the connections apart, and pressure on the whiteboard to push them together, so the IR is on when the connections are together and you are writing, and off when they are apart (it's sitting on the couch).

I've created an extremely crude drawing of it.

Here's what you need:
A plastic pen (with a plastic tip that screws off)
Small wire you can find
Glue of some form (super glue would probably work, though this is still just a theory)
Dead (or not) Whiteboard marker

and tools to do the idea.

So far this is an idea, I just fit it together and haven't created the pen yet.  If you have any ideas to improve this let me know.

I've put most of the instructions on the drawing. 

Note that when the Pen Tip, and the "Something Metal" touch the battery should then flow through the IR LED, so setup the wiring accordingly.  Also the back of the pen is attached to the IR LED so that it won't move, use whatever u want to make this happen, probably super glue again.

File down the tip of the plastic pen top to make this thing a little more sensitive if you want too (this brings the 2 metal pieces closer together, and requires the spring to move a smaller amount).

Here's what it's missing:

You need something on the IR to keep it from falling out of the hole could be anything smaller than the lip of the LED, I'll give pics of the real thing once I find a suitable solution to this.  Other than that it's just hooking the metal on the IR to the correct stuff and including a battery, this is easy enough so I didn't go into it.

IR Pens / Re: Pre-made pens
« on: February 04, 2008, 12:00:37 PM »
So I just bought "everything" needed to make these pens: (as far as I know)

LEDs = .20 cents (come in packs of 5 at the place I found them)
switches = .2 cents (I bought 100 for 2$)
Pens = .50 cents (at walmart)
battery (not sure, I just use one i have), but I think that aaa would be best
wire = free as well, just grab some network cable and have at it

so basically these pens are like $1.50 maybe 2$.  Maybe more if you're going to buy a mount for your battery (rather than using tape, like I was thinking :))

So a reasonable mark up would be based on a %, but instead on time.  No one is going to sell these things for $2.25, that means they'd have to take like 2 seconds to make.  I imagine there are several people that would sell them for say $10

On the other hand, buying in bulk is a lot cheaper, and possibly someone might be willing to sell the parts needed for cheap (like if you're looking for small switches let me know :)).

Wiimote Desktop VR/Head Tracking / Re: Integration of this cool idea
« on: January 17, 2008, 09:49:01 AM »
I think a cool implementation would be to create a "virtual" screen behind your current monitor.  That way you could have "crazy" resolution on your computer, by moving your head to view the picture.

So you would have your monitor closer than normal, and move your head to see the monitor that is in 3d space.  I don't imagine this would be extremely difficult to do, but it would make a 19" monitor into a 30" widescreen.

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