The microcontroller-based concept was chosen because I wanted to scale the sensor system later to suit other applications. Here is the diagram of my Arduino infrared close proximity sensor. As you can ...

Some readers may recall building a line-following robot during their school days. Involving some IR LEDs, perhaps a bit of LEGO, and plenty of trial-and-error, it was fun on a tiny scale. Now ...

[ladyada] has a freshly-published and amazingly thorough tutorial on passive infrared (PIR) motion sensors ... as you’ll see in several demo projects and videos. For the curious, the tutorial ...

It’s a fairly simple project, too: just hook an Arduino Uno up to a motion sensor and an electronic ... ve found clear plastic can interfere with infrared light. You can just leave the power ...

This is a simple arduino project for a soil moisture sensor that will light up a LED at a certain moisture level. It uses Arduino Duemilanove microcontroller board. Two wires placed in the soil pot ...