Usually seen blinking away during a wet race or when a Formula 1 car is crawling through the pit lane is a tiny, pulsing red LED seems like it's got something urgent to say. It's easy to overlook if ...

While we’re big fans of robot vacuums, it never hurts to have a reliable, traditional vacuum on standby. Shark has long been a popular option, offering a long list of upright, cordless, and handheld ...

Signals when an on-circuit battery is exhausted, 5V to 12V operating voltage A Battery-status Indicator circuit can be useful, mainly to monitor portable Test-gear instruments and similar devices. LED ...