Abstract: A device for tracking a light pointer on a display. The device processes analog interlaced field video images from a video camera, seeking the point of brightest intensity, which is the current location of the pointer on the display. Synchronously operating counters and a latch count the lines and pixels of the video data until a high-speed comparator detects the brightest point of the video data. The comparator then sends a detect signal, causing control logic to freeze the counters, as well as freezing the latch, effectively storing in the counters and latch the line and pixel location of the pointer. The same detect signal from the comparator instructs a microcontroller to output the data from the counters in computer readable, digital data format. The device operates in substantially real time in either two or three-dimensional space, with greater speed and significantly reduced cost over the prior art, and an adjustable resolution.