App note: very low-cost sensing and communication using bidirectional LEDs

Squonk writes

Here is an interesting paper on “Very Low-Cost Sensing and Communication Using Bidirectional LEDs”. Not new (2003), but this technical report is very detailed.

The abstract to the document by Mitsubishi Electric states: “A novel microprocessor interface circuit is described which can alternately emit and detect light using only an LED, two digital I/O pins and a single current limiting resistor.”

Thanks Squonk! Via the contact form.

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1 Comment

  1. I used LEDs for sun tracking in my final year project.
    The result turns out far better than LDRs and camera based tracking.

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