For each turn of the crank, the feed mechanism sends one card down a chute where a photodetector wired into an Arduino tells a camera to take a picture. After that, a servo is activated ...

The sensor is really just an infrared photodiode inside of a tube. The diode is connected to an analog input pin on an Arduino. The sensor can be pointed at an object, and the Arduino can sense ...

I built a 3D printed, scanning laser confocal microscope so I could collect 3D surface topology and profilometry data! The ...