Flashing 5watt led?

[samsm255]

I found some other LED's but could you please tell me what one would drain my batteries less?

LED1:http://www.digikey.com/product-detail/en/A008-ERED0-N2/788-1056-ND/2720709
LED2: http://www.digikey.com/product-detail/en/NT-41A0-0482/521-1054-ND/1643054
LED3: http://www.digikey.com/product-detail/en/OV4ZRRRR/365-1892-ND/1985271

What the nube can guess Led 1 and 2 same in max current but 1 lower test current, and led 3 takes the most?
Im leaning towards the 1st one because it has more lumens also cost less than the 3 of them

 

[(*steve*)]

The rate at which it drains your battery is determined by the current drawn from your battery whilst powering it. With the appropriate driver (one of those LEDs appears to run from a higher voltage) if all are operating at 5W, the current drain will be similar.

 

[samsm255]

I think im going change over to this led http://www.digikey.com/product-detail/en/A008-ERED0-N2/788-1056-ND/2720709

Looks of it its bit bigger and it has a heat sink go along with it as well. Also it has more lumens to it. Only thing is not sure how many volts it takes because it didn’t say on the page.
Asked them and they said its same as things light in the Cree's XP-e series http://www.cree.com/~/media/Files/C...d Modules/XLamp/Data and Binning/XLampXPE.pdf they said it should be a forward voltage of 2.1v test current:350, max current:700mA

 

[CDRIVE]

I think im going change over to this led http://www.digikey.com/product-detail/en/A008-ERED0-N2/788-1056-ND/2720709

Looks of it its bit bigger and it has a heat sink go along with it as well. Also it has more lumens to it. Only thing is not sure how many volts it takes because it didn’t say on the page.
Asked them and they said its same as things light in the Cree's XP-e series http://www.cree.com/~/media/Files/C...d Modules/XLamp/Data and Binning/XLampXPE.pdf they said it should be a forward voltage of 2.1v test current:350, max current:700mA

That's correct. The data sheet specs 2.1V (Typ) to 2.5V (Max) @ 350mA but there are three of them in series, which total 6.3V to 7.5V.

I think it's a good choice but if you're going to utilize all three LEDs you're going to have to make some power supply decisions. I didn't like the 4 'D' cells option any way. Personally, I think this little Boost/Buck Boost Converter would give you a very wide range of battery options. In fact I know a member that's been using it with the same Star LED except in white.

http://www.ledsupply.com/micropuck.php

Chris

 

[samsm255]

It would be 6 LED's. Two light units side by side each other each one with 3 leds. but could I wire them all together and have them run off one type of battery other than giving each one its own power? Only thing I see would be a higher drain on the battery. Also could you tell me little more about this Boost/Buck Boost Converter?

 

[CDRIVE]

You can't drive 6 LEDs from a single puck. Did you read the data sheet?

Chris

 

[samsm255]

You can't drive 6 LEDs from a single puck. Did you read the data sheet?

Chris

well umm maybe....no. What page did it say something about it?

 

[samsm255]

I talked to them on the live chat and they said I could power all 6 LEDs. Here What they said.
David ext 1768: if the LEDs are 2.1v, you should be able to power it with a battery.
David ext 1768:I'm trying to see if they are wired in series or parallel.

Sam: ok

David ext 1768:Yes, they are wired in series, so the datasheet. The picture of the board shows the + @ - for each LED, and are joined with a zero ohm chip resistor

Sam: ok so if i watted power 6 of these led's i would need 12.6 volts

David ext 1768: Yes if you wire them in series

Sam:and if i want do it in parallel?

David ext 1768: You can wire 2 boards in parallel. If you want to wire the 6 LEDs in parallel, you will need to remove the resistors and rewire them.
David ext 1768:2 boards in parallel would need 6.3v & 700mA
David ext 1768: 1400mA max

Now is this how I would power all 6 LEDs? in my photo below

 

[CDRIVE]

Now is this how I would power all 6 LEDs? in my photo below

You have the all the SMT 0Ω resistors removed and you've paralleled 3 LEDs of both stars. That would be the worst and most inefficient configuration. Do not remove the resistors. It's doubtful that you have the experience to remove them without damaging the board anyway.

Chris

 

[samsm255]

Agh, would this LED be bigger than the one I have right now? http://www.digikey.com/product-detail/en/R42180/897-1023-1-ND/2182278
One I have right now:http://www.digikey.com/product-detail/en/LR W5AM-HZJZ-1-Z/475-2821-6-ND/2176391

 

[CDRIVE]

The dimensions should be included on the data sheets.

Chris

 

[CDRIVE]

Agh, would this LED be bigger than the one I have right now? http://www.digikey.com/product-detail/en/R42180/897-1023-1-ND/2182278
One I have right now:http://www.digikey.com/product-detail/en/LR W5AM-HZJZ-1-Z/475-2821-6-ND/2176391

I clicked the links and found that neither of them are the star configuration that we discussed. Why are you abandoning the star configuration?

Chris

 

[samsm255]

I know but looked around on both web sites you gave me and every one for a red star led I found would cost $30+ per each one or have buy 10 of them due to the stock amount thing. Only one I could find close to the amount of lumens I want would be this one http://www.ledsupply.com/07040-pd000-f.php 75lm at 700mA. Also talking to them on the digikey live chat and they told me that LED I showed you would use a star heat sink I don't know why but ya

 

[CDRIVE]

Do some searching.

http://www.ebay.com/itm/10pcs-1W-Re...519?pt=LH_DefaultDomain_0&hash=item5895f99b8f

Chris

 

[samsm255]

Know there many leds like ones I need on ebay but over all I don't trust ebay to much due to some things I got from it were cheap and didn't work. Closest thing to a LED would be a 1000 lumen flashlight I got that worked very nice but after I used it 5 times the LED dimmed to almost nothing at all. They gave some cheap advice like change the battery and make sure everything is tight. After telling them It didn't work they more of a oh well and they wouldn't fix it or take it back. Find it better get stuff from companies that are more recognized and able talk to and fix problems better and with more responsibility over their product

 

[CDRIVE]

I fully understand your ebay issue but I'm burning out. Continue your discussions with the Digikey folks and when you're confident that you can work with the LEDs they suggest post it. I must tell you that after looking at your avatar I feel you're destined for a star LED. Yes, it's an uncanny resemblance.

Chris

 

[samsm255]

Look like im going have change my avatar lol. Anyway take look at this one think this one im going have go with.
http://www.digikey.com/product-detail/en/A007-ERED0-N2/788-1064-ND/2720708 only question I have is why there 2 positives and negatives?
I was told it was 55 lumens at 350mA and 100 lumens at 700mA by them, and I believe this would be the heat sink that would work for it http://www.digikey.com/product-detail/en/882-100AB/345-1105-ND/2640528

 

[CDRIVE]

Look like im going have change my avatar lol. Anyway take look at this one think this one im going have go with.
http://www.digikey.com/product-detail/en/A007-ERED0-N2/788-1064-ND/2720708 only question I have is why there 2 positives and negatives?
I was told it was 55 lumens at 350mA and 100 lumens at 700mA by them, and I believe this would be the heat sink that would work for it http://www.digikey.com/product-detail/en/882-100AB/345-1105-ND/2640528

The LED looks doable for you but are you sure that heat sink marries with it. The list of star LEDs it fits is listed on that page. I don't see yours. BTW, the two (+) pads are common to each other as are the (-) pads.

Chris

 

[samsm255]

All the heat sinks that would work for it I would have buy 10 of them due stock thing and other heat sink that said work for this led would cost $50! I dont know why that is...but Talking to them again on the live chat and they looked at it again and said "The manufacturer doesn't recommend a particular heat sink, and it looks to be the right configuration" for this one again > http://www.digikey.com/product-detail/en/882-100AB/345-1105-ND/2640528

 

[(*steve*)]

I think I am agreeing with Chris when I say that it would be far easier to but LEDs already on a star. You still need to attach these to a heatsink unless your duty cycle is very low.