Home › Magazines › 2002 › July › LED Flashlight

LED Flashlight

Published in issue 312, July 2002

If you need to drive a number of white LEDs to provide display backlighting or for a white-light torch what’s the best way to configure them? If they are wired in series then the forward conduction voltage of the chain will be greater than the output from a typical battery. Connect them in parallel and current becomes a problem. To keep the light output constant it is also necessary to maintain a constant current through the LEDs despite a falling battery voltage.

Click below to download a PDF copy of this article from Elektor magazine.

 

Downloads 

PDF Article (e027021.pdf)
10 Elektor Credits
Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.

Subscribe now

Free Newsletter!

News, tips, offers, videos and more. Take out a free membership to Elektor.POST. In your email inbox each Friday!

 

Enter your Email address:

Follow Elektor

      

Act now!

FAQ

Before submitting questions, review our FAQ section!

Package Deals

Elektor Bundles

Check our Package Deals and save money! Discounts up to 19% now available!

Price Slashed

Elektor OSPV

This Open Source People Vehicle is perfect for factory halls, warehouses, hospitals, colleges, schools etc.