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Here is OddBot’s next attempt at making a low cost DIY IR tracking system. I really like how he shares his successes and failures during the entire build process. This is a great resource for learning about IR LEDs.

My newest array, with navy blue IR LEDs works better as I’ve gone back to a single phototransistor for the sensor instead of two in parallel. The idea is that fewer lenses are better. The domed end of a LED or a phototransistor is a lens that focuses the light sent or received. The IR LEDs I’m using have a viewing angle of about 30 degrees. Check you datasheet of both LEDs and phototransistor as it can vary.

More about Making an IR object tracking system

More:Make your own IR obstacle detection sensor

Marc de Vinck

I’m currently working full time as the Dexter F. Baker Professor of Practice in Creativity in the Masters of Engineering in Technical Entrepreneurship Program at Lehigh University. I’m also an avid product designer, kit maker, author, father, tinkerer, and member of the MAKE Technical Advisory board.


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