When LEDs were first introduced, it was hard for us to part with our old friends incandescent and halogen lamps, and the luminaires made for them. It seemed like nothing could ever replace the warm ...

Just as transistors replaced vacuum tubes a generation ago, another solid-state device – the LED – is replacing other electric components in glass containers – incandescent and fluorescent lamps. LEDs ...

We are to modulate different frequencies on different types of LEDs from a fixed distance. We then sense and demodulate the frequencies to determine the color. The product should work in ambient light ...