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 ...

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 ...

Officials believe the sensor's failure caused a booster rocket from the first stage to malfunction and hit a fuel tank, which led to the loss of stabilisation and the emergency landing.

Anchor] Korean researchers have developed a wearable sensor that can measure glucose in sweat.The developed sensor changes ...

Next-gen image sensors developed with ultra-thin photodiodes show over 70 % quantum efficiency, improving performance for digital cameras and security systems.