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Subject: Using optics to measure angle to wall?

Date: 01/22/03 at 4:43 PM
Posted by: Justin
E-mail: j8lam@engmail.uwaterloo.ca
Message Posted:

I am trying to design a circuit to measure the angle (horizontal and vertical) to a wall. I was thinking of something like an IR signal, and a sensor that reads the reflection and determines the angle. Is this possible? The design has to be low cost in mass production (ie, the components shouldn't cost more than $20 total). I need the sensor to communicate the information in a way that I can translate it with a microcontroller to I2C.
Currently, I have a design using AMR (magnetics), but it is too susceptible to magnetic interference from other devices. Any suggestions would be appreciated. Thanks.

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