https://tube.loping.net/videos/watch/6fea4d3e-9167-48a2-8f04-ab6f21301fe8 Did you know you can use an LED as a light sensor? In this video I show you how to use this phenomenon to build a laser tachometer capable of measuring the RPM of mechanical devices. Professional laser tachometer on Amazon: http://www.amazon.com/exec/obidos/ASIN/B000VC8RSE/afromods-20 Check out my webpage for more electronic projects! http://www.afrotechmods.com Sun, 12 Jul 2026 11:05:52 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://tube.loping.net https://tube.loping.net/lazy-static/avatars/8a56e488-2120-4649-a417-badf5893657b.png https://tube.loping.net/videos/watch/6fea4d3e-9167-48a2-8f04-ab6f21301fe8 All rights reserved, unless otherwise specified in the terms specified at https://tube.loping.net/about and potential licenses granted by each content's rightholder.