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100 Watt LED Version 2

jayrob

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This second one has a larger capacity, higher voltage Lipo pack...
(Equals longer run time between charges - 3 hrs!) :D




Build pictures and video below: :beer:



















Battery:

6S 12 Amp hour Lipo pack! :)








Voltage and current readings:


To the emitter - 33.2 Volts / 3 Amps

Battery current draw - 4.07 Amps

This will be about 3 hours run time between charges... :D

Total weight with battery and everything - 7 pounds, 8 ounces. (2 pounds lighter than my 100W HID build)





Here's a brief video:





Hope you like it! :cool:










Click here to see my list of projects and tutorials! :)

 
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Pman

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What did Jayrob do today? Oh you know, just another one of a kind portable sun.....
 

diachi

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Nice build, as always! :)

Those 100W LEDs are damn bright ... going to need to pick up another of those at some point. Can think of lots of uses for those!
 

jayrob

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Thanks for the comments guys... :thanks:




What's the total cost of this build?
Not too bad at all for parts only...

I would say about $40 for the LED, Lens/reflector, both drivers.

Then $25 for the heatsink and fan.

Maybe $20 bucks in the aluminum pieces and small bolts.

I got the wire management clips for about $10 bucks.

18 gauge wire - less than $10 bucks.

Voltage monitor - $30

The big expense is the battery. Pretty much all of my stuff that I like to build is designed around a quality battery which is one of the high cost items.

I got that battery for about $107 shipped. I already had the balance charger for my RC heli's. (you need a good balance charger for a Lipo pack like this)

As you can imagine, the time involved is the biggest cost. (IMO)

It was a very time consuming and tedious build. But that made it all the more rewarding in the end... :)
 
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diachi

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Thanks for the breakdown!

Where'd you source the LED/Driver/Reflector from? eBay I'd guess?

One more post...
 
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jayrob

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Thanks for the breakdown!

Where'd you source the LED/Driver/Reflector from? eBay I'd guess?

One more post...
I'm home for lunch, but later this evening I'll post links to the parts I used... :beer:
 

Benm

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Cool light - it does sound like a jet is about to depart though... is that the fan running or something else in the video?
 

jayrob

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Cool light - it does sound like a jet is about to depart though... is that the fan running or something else in the video?
It's the phone mic picking up sound really loud...

In the video, you can hear the fan come on, but then there are other background noises.

The fan is actually pretty quite... (IMO)



Thanks for the breakdown!

Where'd you source the LED/Driver/Reflector from? eBay I'd guess?

One more post...
Ok so here's some parts links:

LED
Larger reflector and lens
Boost driver for LED
Buck driver for fan
Heatsink and fan
Lipo pack
Wire management clips
18 gauge wire


I already had the balance charger. But if you don't have one that will handle a 6S Lipo pack, then you will need one...

Here's mine


The aluminum frame is made from 3/4" X 1/16" angle - Home Depot

Handle is 3/4" X 3/4" aluminum square - Home Depot

Front stand is 3/4" X 1/8" aluminum flat - Home Depot

It's a fun project, quite a bit of work though. But nice payoff! :cool:
 
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jayrob

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Good work, now for a 500W :eg:
Yeah I looked at those...

70 Volts, 7 Amps = 490 Watts!

It would be nice to just swap out emitters but I'm sure this CPU heatsink and fan won't handle cooling that kind of heat... :undecided:
 

Benm

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That would depend a bit on the thermal maximums of the LED as well.

Let's say you could get a heatsink-fan set that is as good as 0.2 K/W. 500 watts of power would drive that 100 celcius above ambient, which is hot but perhaps acceptable to some high power leds for brief periods.

Considering the power consumption it would to run that long anyway (20 minutes perhaps on this battery pack).

There actually are some (huge...) heatsink-fan combinations for cpu's that go down in the 0.1 k/W range, making continous operation of a 500 watt model feasible, though not all that portable ;)
 




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