int led = 13; // the pin that the LED is atteched to int sensor = 2; // the pin that the sensor is atteched to int state = LOW; // by default, no motion detected int val = 0; // variable to store the ...

This is the first lesson in the Intro to Arduino Input lesson series. We assume you've already completed the Intro to Arduino Output series. If not, please complete that first! In this lesson, we'll ...

We've all heard that "if you want something done right, you have to do it yourself." And that’s usually fine when it comes to ...

Amanda Smith is a freelance journalist and writer. She reports on culture, society, human interest and technology. Her stories hold a mirror to society, reflecting both its malaise and its beauty.