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Enabled by Optics

The Crepuscular Detector
By Alain Francis Talla, Eric Donald Dongmo, Muriel Vanessa Tchakui, and Vanessa Ashu Ngono, University of Yaoundé 1, Cameroon 

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The product consists of two parts, the electronic part and the optical part. However the electronic part consists of three resistances, three potentiometers, one operational amplifier, one transistor and one switch. In additional, the optical part is the sensor (photoresistance).