We can use them to cut things, create laser light shows, and also as a rangefinder.[Ignas] wrote in to tell us about [Berryjam’s] AMAZING write-up on creating an Arduino based laser rangefinder.

Laser particle detectors are a high-tech way for quantifying ... ZH03B recently and wanted to get it working with his favorite sensor platform, Mycodo. With a sprinkling of hardware and software ...

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This DIY lie detector project costs you only around $20 to make. Save for the Arduino Nano ... There's a tripwire — made up of a laser directed at a light sensor — that's placed somewhere ...