dirt cheap 3w leds!

[jrz126]

I think this site is having a sale or something, I just ordered some of the 1w leds (Luxeon I's) for 6.25 each and now they're around 3 bucks. The luxeon III's are even around $3-4 as well (usually $8 each).

http://www.lumiledsfuture.com/products/family.cfm?familyId=8

The shipping is $9.00 and if you spend over $25, there is no handling fee.

 

[audioguru]

Either your link doesn't work, or they have a very slow server.

 

[Someone Electro]

Link works its just an VERY slow server.

Thats preaty cheap.But still that damn shiping

 

[panic mode]

hmmmm..... LXHL-LH3C for binary clock?

 

[jrz126]

the server works fine for me...

hmmmm..... LXHL-LH3C for binary clock?

That would be a blinding binary clock.
I have been considering the idea of mounting several of them to my ceiling fan and run them like a propeller clock. Although they would probably make a better color organ. Getting power to them would be the only problem really.

 

[panic mode]

i know, i was just kidding :lol:

 

[audioguru]

Lumileds' sever works fine now. Before it was taking a snooze.
They have a very confusing product line-up. A Lumiled-V isn't 5W, a Lumiled-III isn't 3W.

 

[justDIY]

Lumileds' sever works fine now. Before it was taking a snooze.
They have a very confusing product line-up. A Lumiled-V isn't 5W, a Lumiled-III isn't 3W.

depends on what color you're going for

if you check out the specs on the red, r-o and yellow star III, they are actually 4+ watt leds (Vf 2.95v If 1.4a)

-----

as I understand it, lumileds is dumping their current luxeon stock to make room for the next generation (mar '06) - most of the star iii's are sold out already, lots of star i's left, at least in their US warehouses.

 

[justDIY]

as crappy as Future's website is ... their fullfilment service is darn fast.

I placed my order last night around quarter to nine (est), and a few hours ago, fedex delievered them ... and no I didn't pay for overnight shipping

pictures coming shortly ... I am pleasently supprised by the size of these units ... sure reading the measurements in the datasheet is one thing, but seeing them up close is another!

 

[Oznog]

I'd mentioned this in numerous other threads, I know it hasn't been asked yet but I figure it's worth hitting right off the bat.

Powering low voltage, high current devices with a well regulated current is fairly difficult. A current mode PWM like the HV9910 is really cheap and works very well provided you have enough source voltage. Perfect regulation and there's no heat.

 

[justDIY]

A current mode PWM like the HV9910 is really cheap and works very well

I agree, the 9910 is awesome ... goodbye lm317t, hello hv9910

only problem I have with the 9910 is getting the super low resistances needed for the current sense ... what I think I'll end up doing is program the current sense for some high value, and then 'trim' the output using a multi-turn pot and the LD pin?

 

[zachtheterrible]

This is where I've always bought my luxeon LEDs from. if you go to the lumileds.com website and buy an LED, it will send you to futurelectronics.com