LCD Card for Checking the UV Level
In these days of global warming maybe it isn’t such a bad idea to slip this slim UV card inside the pocket before you go out to face the sun.
sun
Posts tagged ‘sun’ at the GeekAlerts gadgets and design website.
Maxblaster - The Handheld Sunbeam
Ralf Ottow, a Dutch optics engineer, has designed the Maxblaster - a flashlight powered by 54 batteries, capable of producing a beam of light four miles long.
