As for sensors, it has a light sensor and an optional 9-axis motion sensor, ... explored in a project for a high-precision clock; ... Arduino Uno, light sensor, stepper, TCS34725, turret. Posts ...

We know that measuring the speed of light with an Arduino is possible. It’s just that the implementation is hard. Last month we saw [Udo]’s blinkenlight shield that can be used as a lin… ...