Led sensor

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Revision as of 21:11, 3 August 2008 by FabienM (Talk | contribs) (New page: According to [http://www.merl.com/reports/docs/TR2003-35.pdf this] paper, a simple led can be a light sensor if it used in reverse mode. In fact if led is used in invert, it become a varia...)

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According to this paper, a simple led can be a light sensor if it used in reverse mode. In fact if led is used in invert, it become a variable capacitance.


To test this phenomena , I used to pin of the FPGA, and design a little component that provide the discharging time in a register.

Ledtouchschema.png