Photo Interrupter Sensor is a sensor module based on ITR9608 photoelectric switch, together with special Arduino shield in use.It has been widely used in parts counting, motor speed and so on. Three pins electronic building blocks interface, input 5V - GND, S for digital signal output.
News: All of Octopus bricks has supported Scratch programming. ElecFreaks builded EFBlock support drag and drop programming . Guide please check here