Help with distance sensor...

Jan 22, 2006 3 Replies
W

I am an art student in London, and am looking for help with a project using a distance sensor...



I intend to show a small screen with images on, and want the images on the screen to change depending on the distance of the viewer to the screen.



The images will be of eyes looking at the screen, but the nearer the viewer is to the screen, the more the eyes will look away. By using a small screen, the viewer will be forced to get close to it in order to see what it is showing.



Any help would be greatly appreciated on i) types of motion/distance sensors, and ii) how I may be able to connect them to computer/DVD player so that the images shown will change depending on viewers' distance.



Any other ideas would be useful too - thank you! Tom



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F

You probably want to go with a cheap hobby grade ultrasonic range finder and use a cheap serial interface to the the PC. The serious products are big bucks. Here is one listing:

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-and an example product:

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D

Maybe Maplin

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Dirk The Consensus:- The political party for the new millenium http://www.theconsensus.org
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B

You can get cheap IR detectors, like the ones in bathrooms, from various electronics suppliers. The Sharp GP2D120 gives you 30cm, whereas the GP2D12 gives you about 80cm. These are VERY directional, but cheaper than the ultrasonic sensors mentioned elsewhere. The output is an analog voltage which is related to the distance of the obstruction.

Regards, Bob Monsen "Man with all his noble qualities, with sympathy which feels for the most debased, with benevolence which extends not only to other men but to the humblest living creature, with his god-like intellect which has penetrated into the movements and constitution of the solar system- with all these exalted powers- Man still bears in his bodily frame the indelible stamp of his lowly origin." -- Charles Darwin
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