Hey guys, wanted to show off my freeform arduino that fits into a dry-erase marker. Its got a LM7805 regulator, crystal with caps, and reset button on the top of an atmega328 (and a string to pull it back out:P). The first pic shows it running the blink example sketch. Can anyone thing of any good applications? I figure it at least gives good waterproofing.
Heh - nice to see someone doing this kind of thing - have you seen this guy's work?:
http://www.geocities.jp/arduino_diecimila/obaka/project-2/index_en.html
Yeah that one was good inspiration. No clue how he made it that neat though..
You could put an accelerometer in, or at least, a tilt switch, to detect when it has been picked up and is being moved around. This could then send a signal somehow to switch a projector bulb off for a while, or switch the room lights up a bit for a while. Then when you put it back down and it hasn't been moved for a short while, the room light could fade down or the projector could power up again.
Of course, it'd still need to function in its original manner, as a marker.
With an accelerometer in there you could even do crude gesture capture, storing the motions of the marker to a small external SPI FLASH chip as long as the marker was roughly held in a horizontal position (indicating that someone was writing). Then later you could download the gestures and recreate the writing with a "little bit of software"
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The Gadget Shield: accelerometer, RGB LED, IR transmit/receive, light sensor, potentiometers, pushbuttons
Here's some off the top of my head;
Datalogger for projectile analysis in ballistics projects
- slap it in a potato, load up the spudgun and perfect your fuelmix.
TV-B-GONE
POV-pen
Speed control for slot-cars
Lights-seeking missile
Encoded pocket transmitter
If you could squeeze the power supply inside it would make a great platform for pranking...
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Rolls away when someone tries to grab it
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Screams when picked up
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Flashes or screams when shaken (because it won't write)
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Vibrates when picked up
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Randomly rolls around
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Screams loudly when thrown or dropped
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Randomly pops the cap off
Looks like a natural setup for model airplanes, rockets, small balloon, and similar setups.
Heh - nice to see someone doing this kind of thing - have you seen this guy's work?:
http://www.geocities.jp/arduino_diecimila/obaka/project-2/index_en.html
Smiley
K, now I'm going to have to do that using a surface mount Amtel. 
Some time back I saw a video of a guy who put an IR led on the tip of a dry erase (replacing the felt) and using the wii's ir camera he made a diy smartboard. You could do something like that, but perhaps with more complexity now that you have an arduino inside.