Have you ever noticed a blinking red light on one of your smoke detectors and wondered what it meant? Here are the different ...

Dear Action Line, I find myself in acute intellectual misery as I attempt to determine why most of the flashing yellow left ...

Blinking an LED with three resistors and a capacitor. Ok, ok… one of the resistors is a light-dependent resistor, but still. In reality, this is a classic relaxation oscillator. The capacitor ...

Sometimes, if you're out shopping late at night (and perhaps lost where you parked your car), you might notice a blinking blue light in the parking lot. This isn't a standard parking lot light ...