Light bulbs and switches have been the subject of a variety of popular and perplexing mathematical puzzles. Here’s one that Martin Gardner mentions in an article on the binary Gray code.

Electrical components, like motors close motorA device which spins when current flows through it. Motors are used in fans, food processors and many other devices. and lamps close lampA component ...

Some of these could be replaced with a working bulb, but not all. The other type of circuit light strands use is a parallel circuit. In this setup, each bulb is on its own circuit to the power source.

Perhaps the best example of an electric circuit—so that you can see everything—is a single battery and a small incandescent light bulb. (You could do this with an LED light, but connecting it ...

In 2007, Congress directed that general service light bulbs — the standard pear-shaped bulb familiar to all consumers that comes in incandescent, fluorescent and LED technologies — consume ...

After his U.S. Patent No. 223,898 for an "Electric Lamp" was found to be valid in the Circuit Court of the Western District of Pennsylvania, the case was appealed to the Federal Circuit.

Edison Light Bulb, 1879 Thomas Edison used this carbon-filament bulb in the first public demonstration of his most famous invention—the light bulb, the first practical electric incandescent lamp. The ...

Light-dependent resistor (LDR) The resistance of a LDR depends on light intensity. At low light levels, the LDR has a high resistance. As the light intensity increases, the resistance decreases. A LDR ...