[td0g] created the light gates using pairs of infrared photodiodes ... and the light gate sensors should be for sale on Tindie soon. He has successfully used the rig to measure various projectiles ...

This tutorial will guide you through the process of building a tachometer around an Arduino ... an Infrared beam to measure fan speed. As with last year’s PIC-based tutorial, [Chris] is using ...

I recently had to build an infrared close proximity sensor that could tell if something was dropped in a parcel delivery drop box. After some searching, I ended up using a microcontroller ... Here is ...

Why not create your very own high-speed camera trigger using an Arduino, piezoelectric sensor (as a sound sensor), a DSLR camera, and an external flash. Watch the video after the break to see it ...

At points I might do something that might be dangerous because I'm comfortable with some tools or techniques but please always use your common sense and don't try everything you see here.

These little Arduino boards are a real boon to amateur electronics tinkerers: cheap, versatile, and very small. This guy had the idea to make a high-speed photography setup using one, instead of ...