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Light intensity sensor - Phododiode

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Audioguru

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The Dropbox website does not work. Maybe we need to join it to see anything over there?
Instead, please attach the info about the MULTILED here with your posting.
 

SunnySkyguy

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THis is a broadband Op amplifier controlled by C ratio with DC blocking breakpoint at R19//C20 on feedback.

Since the diode is anode grounded with reverse biased PD the cathode is at V+ with null current and drops input voltage , inverts to a positive peak AC amplifier with detected light.
 

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