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.
A recent breakthrough in nano-optical sensor technology now offers precise, real-time monitoring of structural stability and deformation, promising to transform the field of structural diagnostics.