What's New
- iriver Lplayer teardown
- Sipura SPA-841 teardown
- Robotic locomotion
- Finding value in work
- ZFS: the final straw
- Cross-blog pimpage: sixproducts.com
- Running AbstractSpoon ToDoList under Wine
- Aoyue 906 Hot Air Rework Station review
- What I learned from setting up ZFS on my fileserver
- Nokia E65 review: how does it stack up against a 5-year-old Siemens ME45?
- Extending battery life on the Dell XPS M1210
- A quick guide to using MySQL in Python
- Market segments and tactility: the new Apple iPhone
- Cree XR-E LEDs
- What's New block for Drupal
- Google calendar for Sydney adventure and MTB races
- Background Check Antivirus
- Multithreading and performance
- DVI on laptops
- Dell XPS M1210 review
- Improving university for developers
- Automatic Wealth for Grads, by Michael Masterson
- Converting Access databases to PHP/MySQL webapps
- Testing the board
- Assembly
- Making a PCB
- Random bits and pieces
- One weekend, one PCB layout
- Commitment
- Accounting software
- More LTSpice rambling
- The things you find...
- Playing catchup
- Market research
- What type of business?
- Introduction
- New look
- Integrating the H-bridge and its controller
- Using CPLDs and FPGAs in hobby electronics
- A simple logic analyzer
- I2C-based H-bridge controller with PWM
- The virtues of small development teams
- Building a Sumo robot (summary)
- High-power LED mountain bike light
- Optimizing your Start menu for fast program access
- The best batteries in the world...
- Battery-powered USB iPod charge cable that requires no special components
- How to build a simple Luxeon LED bike headlight
Re: LED Drivers
Most high-power LEDs are more efficient than the K2. When I originally planned out those lights, I was drawn in by the high current rating. Turns out it's not good for much (light output at 1500mA isn't much more than 1000mA).
My current set of lights is based on Cree XR-E's. I'm very pleased with them. Note that the original Cree XLamps (used in this article) are not particularly efficient themselves.