Building an Arduino speed detector using IR technology to measure the speed of a moving object is much more cost-effective, ...

Build a light-activated switch using LDR that lets you control home appliances using your mobile phone's torch.

the calcite setup demonstrates how light ‘chooses’ a path, revealing the probabilistic essence of quantum mechanics. Using common materials (laser pointers, polarizing filters, and calcite ...

But it could serve as a gateway to the ultra-short-throw experience. At the heart of the K300s is a RGB triple-laser light source that puts out 1,000 ANSI lumens of brightness – this means ...

The HP LaserJet M209d is a sterling value among low-cost, print-only mono laser printers. (If you're considering an inkjet but print only occasionally, it's a tempting alternative.) Its paper ...

In his book The Mathematical Universe, mathematician William Dunham wrote of John Venn’s namesake legacy, the Venn diagram, “No one in the long history of mathematics ever became better known ...