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 ...

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 ...

AC/DC’s touring power has been similarly steady, from 1978, when it opened for Aerosmith for multiple sold-out arena dates, to 2010, when its four best-selling concerts ever grossed $11.7 ...

Circuit 1 This is the most simple application, but it is generally limited to detecting a fixed AC current. The ballast resistor (R1) must be calculated for the desired primary current. A single LED ...

Brian Johnson, 75, has been the lead singer of the rock band AC/DC since 1980. He is the author of “The Lives of Brian: A Memoir” (Dey Street). He spoke with Marc Myers.

Prince George is a big fan of rock bands like Led Zeppelin. REUTERS AC/DC members rehearse for a gig circa 1977 in Hollywood. Getty Images ... “I’m grateful I get to go,” Perry said at the time.