CampingLED
Enlightened
Noticed that DX has just released C-Bin SSC P7s on a base at almost the same price as a B-Bin bare emitter.
SSC P7 C-Bin LED with 21mm Base @ DX
- Thread starter CampingLED
- Start date
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CampingLED
Enlightened
Based on the other emitters that I purchased from them I am quite sure that it is. I wonder why they did not use a star as the size is almost the same.
jasonck08
Flashlight Enthusiast
I saw this also on DX... Looks like a very good price if it really is a true "C" bin. Cheaper than everywhere else by ~$5+
@ CampingLED
Stars are usually made out of very thin aluminium. I believe the base on this one is a bit thicker, so better for heat spreading...
@ CampingLED
Stars are usually made out of very thin aluminium. I believe the base on this one is a bit thicker, so better for heat spreading...
rizky_p
Flashlight Enthusiast
i bought bare stars for P7 from KD and yes they are thicker then you normal Cree/SSC stars...
CampingLED
Enlightened
Time will tell if it a true C-bin. I do not think they will make the same mistake twice in a row since the bare emitter was originally advertised as a 900 lumen and later changed with a correction.
kwarwick
Newly Enlightened
I would tend to agree that it is mostly likely a true C-bin. Almost as important is to know what the tint and vf are. The other P7 on DX is SYP tint which is the bluest of the bins ... 8000 - 10000 K :thumbsdow
AvPD
Enlightened
I wonder how much the cost will decrease as time goes by. Will they get down to $10 by the end of the year?
10 dollars!! That would be GREAT! :twothumbs
So my friend is thinking about using these P7 leds in his car as reverse lights.
However, I haven't been able to find him a suitable driver for it anywhere. I know KD offers a driver for the P7, but the input range is far below the 12+ volts a car would put out.
Any takers on helping a LED newbie on what to drive these P7's with in a car or how to do it?
Any help is much appreciated.
So my friend is thinking about using these P7 leds in his car as reverse lights.
However, I haven't been able to find him a suitable driver for it anywhere. I know KD offers a driver for the P7, but the input range is far below the 12+ volts a car would put out.
Any takers on helping a LED newbie on what to drive these P7's with in a car or how to do it?
Any help is much appreciated.
CampingLED
Enlightened
The easiest is to use in-line series resistors. You could either use the two P7's in series with one resistor or use them in parallel with a resistor per P7 (recommended as the wiring of the car should support this option better). To assist with the calculations of the resistors, you can see here. Use a value of 13.5V or 13.8V for the car battery with alternator running.
LukeA
Flashlight Enthusiast
Resistors will waste far too much power to be useful. Instead, 4 DX sku.6090 modules with no reflectors will be more efficient off of automotive 14V.
Thanks for the info! Would I link sku.6090 in a series and then hook up my two P7s in series with it?
Also, it would be a big waste in reflectors, is there a place I can just get the drivers without the extras?
Also, it would be a big waste in reflectors, is there a place I can just get the drivers without the extras?
LukeA
Flashlight Enthusiast
Sku.6090 is a board and Cree P4 emitter mounted to a brass threaded module. You wouldn't need any P7s.
If you're dead-set on P7s, then Kaidomain sells just a board that puts out 700mA from automotive power. This one. I'd wire 3 of those in parallel and the 2 P7s in series off of that.
Thanks LukeA.
I'll pass along the information and I'll let you know how it went upon completion!
:twothumbs
I'll pass along the information and I'll let you know how it went upon completion!
:twothumbs
Led_Blind
Enlightened
Ha, yeah, by accident a set of vice grips slipped and ripped it straight off solder, traces and all
It still works and doesnt appear any different
mikel81
Newly Enlightened
Ya, desolder the pads as good as you can grab with two sets of pliers, heat and twist. Mine popped right off.
coolwaters
Newly Enlightened
- Joined
- Jul 5, 2007
- Messages
- 123
if its a cree emitter i dont recommend your removing that...its the second hardest LED i had to solder bare. the first is Rebel....
i used some pilers to hold the star board and used a hand torch and after a few seconds the emitter slide right off. i dont recommend ripping it off. those things are fragile...
i used some pilers to hold the star board and used a hand torch and after a few seconds the emitter slide right off. i dont recommend ripping it off. those things are fragile...
manoloco
Enlightened
my dad likes to use a car battery for a lot of stuff, can i use this 6090 module directly fed from a car battery?, would heat be a problem if its used like a bulb hanging from a ceiling without it being attached to anything?
also i found this: http://www.dealextreme.com/details.dx/sku.11836 would it serve the same purpose?
