An overwhelming majority of handheld devices these days have ambient light sensors built into them. A large percentage of TVs and monitors do, too, and that proportion is growing. The sensors allow ...

Members can download this article in PDF format. Light sensors detect the presence or absence of light, and the intensity of that light. These sensors then convert light energy into an electrical ...

IR sensors rely on an emitter (IR LED) and a detector (photodiode or photoresistor) to measure infrared light and convert it ...

For decades, the ability to visualize the chemical composition of materials, whether for diagnosing a disease, assessing food ...

Amanda Blum is a freelancer who writes about smart home technology, gardening, and food preservation. Previously, Amanda has worked as a technology strategist specializing in problem solving and ...