I am trying to make a counter which should work in a solar light. I am thinking to use two ambient light sensors placed close to each other and use a differential amplifier. One sensor receives a RED laser light and sunlight on it. The Second sensor receives just sun-light. Therefore, I would have zero volts at the output if LASER is absent or else HIGH volts if it is present. Will this work?
I have two lasers with me. (1) Red laser. 660 nm and 130mW. (2) Green laser 532nm and 50mW.
I have this sensor: http://www.everlight.com/file/ProductFile/ALS-PDIC144-6C-L378.pdf (also have 5mm too)