leds

Fairly certain the LEDs he was talking about were the turn-lane indicators, that warn a turning car if a bicyclist is on the way.

But the highest efficiency color for LEDs to produce largely depends on what Cree and Nichia are doing this year.

The heatpipes are either overkill, or these LEDs run very hot (combined 10W+ of heat).

Funnily enough, most of the GaN and GaAs devices in general use are LEDs!

But if you do want the benefits of LEDs, there are better ways of getting the energy than lifting sacks to the ceiling.

Dynamos and LEDs are reasonably efficient in comparison, and also not fire-prone.

Although I guess backlights are just a few LEDs these days, so probably actually not too bad to keep on.

The electronics providing the correct voltage/current to the LEDs, not so much.

Wouldn't the metal frame of the lamp itself sufficiently cool 'normal' LEDs?

They generate their own power to illuminate the 2 bright white LEDs.

I think the IC itself is 16 pin, but only 6 is broken out on this board (rest is LEDs/etc).

Are there any good resources online for building your own LEDs etc.

I question the claim that "lasers are brighter, [and] more energy efficient [than LEDs]," though.

"Eight LEDs provide 587lx of warm, white light for 37 years" But that's the only reference on the page.

On the LEDs, the industry accepted method for measuring lumen maintenance of LEDs sets an "upper reporting bound" on LED life estimates at 6x the length of test data, since we aren't sure whether the prediction model will hold true over the longer term.

The other three threads are used to instantiate a generic blink() function that drives two LEDs at different frequencies and a generic buzz() function that drives a buzzer at different frequency e length of the sleep (to create a "beat" effect), calculated on the basis of the acquired analog signals.