Smartphone rapid test detects microbiologically contaminated water in less than a minute

Worldwide, billions of people rely on water sources whose hygienic quality is unclear or difficult to monitor. Conventional ...

What Home Lead Test Kits Can Tell You and What They Can’t

Lead, LeadCheck, and Safe Home. Most DIY kits can detect high levels of lead, but miss lower levels that could still be ...
IEEE

Fundamental analysis for visible-light communication system using LED lights

Abstract: White LED offers advantageous properties such as high brightness, reliability, lower power consumption and long lifetime. White LEDs are expected to serve in the next generation of lamps. An ...
EE World Online

Making sense of test circuits with Kirchhoff’s laws: part 1

You can avoid solving simultaneous equations in multiple unknowns by identifying series and parallel combinations of resistors.