Projects

Track/Pad

Track/Pad

The Track/Pad is a 2D infra-red touchscreen device which is designed to be robust enough to handle ball-throwings. The intended showcase was some kind of virtual can/duck shooting application.
In cooperation with the Department of Telecooperation I developed this touch-sensitive device with a effective size of 1280 x 960 mm. Due to the required robustness in combination with the goal to produce a low-budget device I decided to use a video projector to display the screen on the device. In doing so the Track/Pad reduces to the recognition electronics and an according wooden frame plus a base plate. That frame covers the infra-red emitters and receivers which enabled a recognition accuracy of 1 cm. Hence, with a screen resolution of 1280 x 960, one pixel maps to one square centimeter.
The actual transmission of the position data to the evaluating computer is done with a Atmel AVR microcontroller (ATmega128) which emulates the protocol of the Elo Touchsystems devices. In that way, I came around implementing device drivers for the Track/Pad on my own, because Elo Touchsystems device drivers are already available for most common operating systems and platforms.
Thus, the final demo application simply needed to react on standard mouse events to handle the data of the Track/Pad.


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