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 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 ...

CNET’s expert staff reviews and rates dozens of new products and services each month, building on more than a quarter century of expertise.

Early alignment and test planning derisks commercialization of high-performance optical devices, says Minnetronix engineer ...

LED light bulbs are bright, energy-efficient and can be equipped with extra features, unlike regular bulbs. Whether you're looking for maximum brightness in darker rooms or you want a light source ...

Here’s how it works. The best solar lights will keep your backyard or porch lit once the sun goes down. If you enjoy relaxing in the backyard or hosting evening gatherings, solar lights can add ...

Have you been paying attention to current events recently? See how many of these 10 questions you can get right. Compiled by Jeremy Engle Is there a goal you’d like to pursue by doing ...

We present a case of unilateral, secondary open-angle glaucoma due to an underlying diffuse iris melanoma. The patient was referred by his ophthalmologist with uncontrolled, elevated intraocular ...