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Electronics => Projects, Designs, and Technical Stuff => Topic started by: firehopper on March 07, 2016, 08:12:02 am

Title: my 100 watt flashlight build
Post by: firehopper on March 07, 2016, 08:12:02 am
I've been posting pictures on another forum with some info on my 100 watt led flashlight build, I'm using a 1967 105 mm howitzer shell as the case.

http://budgetlightforum.com/node/43750 (http://budgetlightforum.com/node/43750)

Title: Re: my 100 watt flashlight build
Post by: bseishen on March 08, 2016, 06:58:34 pm
Cool build. I have a half completed one myself. Have you gave dimming circuit any thought? Also have you seen these? http://www.ebay.com/itm/221952988382 (http://www.ebay.com/itm/221952988382) Liable to catch fire the first time you use it thoug :P
Title: Re: my 100 watt flashlight build
Post by: station240 on March 08, 2016, 08:38:18 pm
Often plugging the description of these cheap Chinese DC-DC converters into google will yield a video review. Also pay attention to the size, if it's really tiny, it's certain to not be capable of the claimed output.
Title: Re: my 100 watt flashlight build
Post by: firehopper on March 08, 2016, 11:52:03 pm
Quote from: bseishen on March 08, 2016, 06:58:34 pm
Cool build. I have a half completed one myself. Have you gave dimming circuit any thought? Also have you seen these? http://www.ebay.com/itm/221952988382 (http://www.ebay.com/itm/221952988382) Liable to catch fire the first time you use it thoug :P

I have a 100 watt one, and a 400 watt digital I might use. might see if I can get a analog 400 watt one,
Title: Re: my 100 watt flashlight build
Post by: ZeTeX on March 09, 2016, 12:27:21 pm
That heatsink look rather small, what are the temps?
Title: Re: my 100 watt flashlight build
Post by: firehopper on March 09, 2016, 10:22:58 pm
which heatsink?
Title: Re: my 100 watt flashlight build
Post by: joeqsmith on March 10, 2016, 02:35:32 am
8000LM, nice! Using the shell case is a bonus.   Post some pictures of it once it's done.
Title: Re: my 100 watt flashlight build
Post by: firehopper on March 10, 2016, 09:39:21 am
Quote from: joeqsmith on March 10, 2016, 02:35:32 am
8000LM, nice! Using the shell case is a bonus.   Post some pictures of it once it's done.

its a cheap Chinese led so actual lumen output is unsure :)

I dont know why I picked a shell as the case but eh, It wasnt super expensive, $50 for a 1967 howitzer shell.. wanted brass but this one is steel, I can deal with it :) gonna use all flat head screws when I get some, I had some hex head ones lying around that I'm using for setup.
Title: Re: my 100 watt flashlight build
Post by: ZeTeX on March 10, 2016, 12:38:25 pm
Quote from: firehopper on March 09, 2016, 10:22:58 pm
which heatsink?
the led your mounted on the heatsink, the heatsink looks rather small for such a high power led
I've seen someone using cpu copper pipe heatsink as a heatsink for the led.
Title: Re: my 100 watt flashlight build
Post by: firehopper on March 10, 2016, 05:55:22 pm
its actually pretty large, and has quite a bit of heft to it. plus there will be forced air across it and the driver.
Title: Re: my 100 watt flashlight build
Post by: SeanB on March 10, 2016, 06:09:04 pm
All I did was use the Intel heatsink and a 6W LED lamp, and then repurposed a wooden bedside lamp as a base for the shell.  Could do with a polish, but the patina and the gun barrel markings look nice though, and it is a nice room light as is.
Title: Re: my 100 watt flashlight build
Post by: firehopper on March 14, 2016, 06:54:20 pm
I just posted 3 more photos on that forum if anyone wants to see. tiny bit more progress :) need to test the 400 watt controller to see if it comes back on at the settings that were used last..
then I can go and start assembling it perhaps.