Or you can go back to basics and build this reflective RGB sensor from an LED and a photocell. The principle behind [TechMartian]’s approach is simplicity itself: shine different colored lights ...

This one uses LEDs as the light sensor and mosfets to drive the output to rotate on a single axis. He even reduced the duty cycle on the fets so no heatsink is needed. Mounting in a peanut butter ...

Fibre optics sensor technology is used to screen pregnant women to help identify the condition at an early stage so that ...

CHENNAI: An IIT Madras-led multi-institute research team has developed a new biosensor platform that can test pregnant women ...