A new system called CRTouch has been developed by three students from the University of Hasselt in Belgium, Dieter Meeus, Miel Truyen and Nand Truyen. The CRTouch system allows touchscreen capabilities to be added to a old CRT monitor.
The CRTouch concept uses a Altera DE2-70 board and a few phototransistors in the fingertips of a glove to detect the electron beam created by the CRT monitor, to create the touchscreen.
The video below shows the CRTouch concept in a action, together with an explanation on how the system uses the CRT monitor to recognise the glove touching the screen.
“The inside of the screen is coated with phosphors which glow when excited by electrons. This project harness that property, using a photo transistor in both the pointer and middle finger of the glove.”
Source: Engadget : Hack a Day : Denacke
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