LED technology is opening thedoor to a variety of high-power-illumination applications. The circuit in Figure 1 can let you know when ac power is available. To drive a power LED from the ac line ...

Next time your at a LED traffic light, realize that they are so many leds there isn't a need for a resistor so they only have rectifiers and you can see the LEDs flashing at 60Hz so yes they have ...

Fairchild introduced the new FL77944, a family of LED Direct AC Drives that manufacturers can use to easily scale power and create smart and scalable LED-based lighting.

These AC comparators allow you to visually monitor the levels of AC input signals with LEDs for signal level indication.