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 ...

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 ...

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.

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 ...