As stated, this circuit accepts two power sources: from a small solar cell with a peak output voltage of about 5 V and from a standard USB power supply with a nominal voltage of 5 V. Three transistors ...

An LED-driver reference design for an LED replacement of 100W incandescent bulbs has been introduced by Power Integrations, writes Richard WIlson. Dubbed DER-322, the circuit is desigend to fit neat ...

Look closely into this DIY project to create a powerful USB LED light. Follow the straightforward steps to assemble a bright and energy-efficient light source that plugs right into any USB port.

Choosing a discrete driver circuit requires an understanding of LED lighting to make the best trade-off. This Design Idea describes a simpler and equally good way to employ the ubiquitous 555 IC. In ...

Since this column began, it has discussed how a Linux driver writer can create various types of kernel drivers, by explaining the different kernel driver interfaces including TTY, serial, I2C and the ...

I’ve been testing two brands of USB-powered light strands, both with their origins on Kickstarter. Let the fight between Fairystring and Luminoodle begin!

An isolated three-port LED driver combined Flyback circuit with Two-input Buck circuit in photovoltaic power generation application is proposed in this paper. Based on the proposed isolated three-port ...