What is the difference between LED and photodiode?
An LED is forward-biased and turns electrical energy into light; a photodiode is reverse-biased and turns incoming light into a current — opposite energy conversions.
An LED is forward-biased and turns electrical energy into light; a photodiode is reverse-biased and turns incoming light into a current — opposite energy conversions. A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.
Key point
LED vs photodiode
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