This is a Button Switch with Circle Transparent Cap, which detects your press action. It is ideal for beginner class to test the Arduino or be your first sensor in your project. It was easy to be used for Chipkit, STM32, AVR, ARM and other mirc-MCU.
News: All of Octopus bricks has supported Scratch programming. ElecFreaks builded EFBlock support drag and drop programming . Guide please check here