TRKBRD surface touchpad puts your weekend DIY project to shame, probably
![](https://s.yimg.com/ny/api/res/1.2/6MGLw67SdFnWiZT1Chan8g--/YXBwaWQ9aGlnaGxhbmRlcjt3PTk2MDtoPTU0Mg--/https://s.yimg.com/uu/api/res/1.2/GnCE4nLO3WGWiaLHYk.btA--~B/aD0zMzY7dz01OTU7YXBwaWQ9eXRhY2h5b24-/https://www.blogcdn.com/www.engadget.com/media/2009/08/arduino-trkdbrd-rm-eng.jpg)
It may not seem like much from this video, but Malmö University graduate student Rob Nero has assembled himself a surface-based touchpad using all Arduino products and "simple Algebra." Dubbed TRKBRD, the device uses hyper-fast flashing LEDs and IR sensors to calculate the XY coordinates of the shadow, and subsequently the finger itself. We haven't seen it hooked up to a computer just yet, but we hope there's more to come. Videos of the successful trial run and some preliminary testing and wiring after the break.
[Via Make: Online]