How the Vmarker sensor works...

The Vmarker™ solution is a very economic solution to transform your computer with projector(beamer) into a real Interactive Whiteboard.
The solution uses Infrared technology to achieve this. Beside of the computer and projector(beamer) you need the Vmarker IR-sensor USB™ and an IR-pen. The most simple IR-pen is an IR-LED that you connect to a battery of 1.5V interrupted by a push button.

The Vmarker IR-sensor UBS™ is connected to a USB port of a computer. The OS (Windows and Linux) will recognise the device as a normal HID device(mouse and keyboard). No need to install any driver software. You aim the Vmarker IR-sensor USB to the projection screen. The position of an IR-pen(IR dot) on the projected-image, is translated into the position of the mouse cursor on the screen.

When setting up the Vmarker IR-sensor USB at first calibration is necessary. The calibration is stored in the sensor itself. Recalibration is only necessary again if the position of the Vmarker IR-sensor USB™ compared to the projected- image is changed.
To calibrate the sensor you'll have to put the sensor in calibration-mode, next you have to point the IR pen to the four corners of the screen.
After calibration the IR pen is synchronised with the position of the mouse cursor on the screen.