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Light Operated Switch

Light Operated Switch

http://www.web-ee.com/Electronic-Projects/projects/light_op_switch/index.shtml

FET input high speed light detector

FET input high speed light detector

This circuit is yet another design that converts current from a PIN photo diode to a voltage. It has a bandwidth that extends beyond 50MHz.

http://www.discovercircuits.com/PDF-FILES/fetamp0.pdf