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  • SzymonB2 commented on kenyer's instructable Better LED as light sensor3 years ago
    Better LED as light sensor

    Search for an article (and a video) from Scott E. Hudson: "Using Light Emitting Diode Arrays as Touch-Sensitive Input and Output Devices". He reverse biases the LED and then waits for the LED capacitance to discharge. The discharge rate is correlated to the leakage current and thus is light dependent.

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