A voltage multiplier is applied as a high source impedance, 36V, 300mA, 12W LED driver. The high source impedance is ideal for driving power LEDs because it accommodates variations in LED junction ...

Most small-size color LCD displays today use white LEDs for backlighting. These systems usually involve handheld devices with an LED drive circuit powered by a battery whose output voltage varies over ...

There are many power management methods that can be used for LED lighting. You can drive them via a number of dedicated driver ICs available on the market, or even use microcontroller units (MCUs) for ...

Last week, Zetex released three power LED driver chips. Electronics Weekly decided to look deeper into the technology. There are three white power LED drivers; the ZXLD1320 1.5A buck, 1321 1A boost ...

This circuit senses AC audio voltage supplied to the car-radio loudspeakers and displays it as power using a LED bar graph, achieving at the same time an attractive visual effect. It is designed to ...

I'm wondering what the generally accepted rules are about what the maximum draw on a motherboard's led connectors is. I'm thinking about hooking up 2-3 leds per function (hdd, pwr, etc) and want to ...

Multi-die packages are flavour of the month among the high-power LED manufacturers. Certainly for both manufacturers and designers chasing the title of “highest lumen output” device, this approach ...

Everlight's new HiVo series comprises a 1, 2and 4W solution. The single chip LED provides a luminous flux of 80 / 100 lm at48-55V dc in a color temperature of 3000 / 5700 K. The 2W product with two ...

Brian Cooley is CNET's Editor at large and has been with the brand since 1995. He currently focuses on electrification of vehicles but also follows the big trends in smart home, digital healthcare, 5G ...

There are plenty of utilities out there to control keyboard LED indicators, but I'm rather interested in controlling the power LED on my headless 1U rackmount. While theoretically there are tons of ...