Oshpark Projects

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MRsDNF
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If you haven't seen this thread you may find it interesting.

http://budgetlightforum.com/node/16435

Have fun and keep a fire extinguisher handy.

 

djozz quotes, "it came with chinese lettering that is chinese to me".

                      "My man mousehole needs one too"

old4570 said "I'm not an expert , so don't suffer from any such technical restrictions".

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WarHawk-AVG
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RMM wrote:

When I saw this board over at Oshpark I knew I had to try one.  I haven’t decided what to put it in yet and probably won’t have time to do it for at least a few more weeks but there it sits…beckoning me. Surprised  So much power in such a tiny little package.

I don’t think I’ll be going direct drive with this one…or maybe direct drive with a 15 second turbo timer and electronic switch???  Three of these mounted in an M6?  Ultra-ultra mule?  It pulled 14A from a single purple Efest 18350; I’m scared to see what it would do on a single 20R or VTC4.  

Nah, I’ll probably end up throwing it in an EDC tube type light and limiting it to around 6A and be reasonable for once.  Wink

Heat issue? Did you fill the vias with solder when you flowed the emitters

And HOLY MOLY Batman…that’s alot of XM-L’s!

RMM
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Yes, the vias are completely filled with solder.  Yes, I realize that this is potentially very dangerous.  On most boards when the LEDs get too hot they tend to float off the board, shutting things off.  Here they may float but there's nowhere to go and they may end up creating a short circuit instead.  A short circuit with a high drain cell is not something you want to see!  

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djozz
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I ordered scaru's scaryboard as well Evil , a good way of getting rid of all the 1st gen. XML's leftover from swaps Smile

Helios-
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What are you guys going to do with them?

All that heat in 20mm. On fr4. :~
I have the desire to place a large via or two under each xml thermal pad so that a short piece of solid core copper wire could be placed through there.


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djozz
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Helios- wrote:
What are you guys going to do with those things. All that heat in 20mm. On fr4. :~ I have the desire to place a large via or two under each xml thermal pad so that a short piece of solid core copper wire could be placed through there.

In my build it will be less than 1A / led, it will be an efficient light Smile .

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I want to crank it up and toast marshmallows over it! :bigsmile:


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Cereal_killer
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Are you concerns about heat with it? Does it have via’s under the center pads that you filled with something (copper wire/solder)? Is it 20mm? Looks awesome. Edit: question answered, didn’t see the next page after your post.

Is that an NCR18650BD back there? Any plans to add those to your store? I’d like to get a couple but after a disappointingly long wait on a set of NCR18650PF’s from FT (still waiting @ 38 business days) I don’t think I’ll be ordering any more batteries from over there.

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antoninodattola
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http://oshpark.com/shared_projects/H7WGuYpM

 

Thanks Mattaus! it took very own! 

  please put on the front page! perhaps with cart DigiKey! 

 

you are great guys!

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Cereal_killer wrote:
Are you concerns about heat with it? Does it have via's under the center pads that you filled with something (copper wire/solder)? Is it 20mm? Looks awesome. Edit: question answered, didn't see the next page after your post. Is that an NCR18650BD back there? Any plans to add those to your store? I'd like to get a couple but after a disappointingly long wait on a set of NCR18650PF's from FT (still waiting @ 38 business days) I don't think I'll be ordering any more batteries from over there.

Of course I'm concerned with heat!  I think that I'm going to go the reasonable route and keep it around 6A...should be very efficient and not as crazy.  Direct drive I think it would pull around 18-20A from a single 18650, way too much heat for that board and especially for a small 18650 tube light, even with a perfect thermal path.  There are vias under each of the emitters which I filled with excess solder paste when I reflowed then smoothed off the excess on the underside after I was done.  

Those cells are 2900mAh NCR18650s I bought from Wallbuys last year.  The cells are decent but the protection circuits aren't so hot.  I bought four of them and two of them trip with anything over 4A, the other two will do a hair over 5A before tripping...I know that at least two of them will run down to 2.5v resting without tripping the protection circuit.  My son left my headlamp on for about 12 hours with two of them in there, when I found it the light was barely glowing.  After about an hour each of the cells measured around 2.5v.

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RaceR86
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What is the max current the different Oshpark boards can handle? Are they able to handle up towards 30A?

0:)

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RMM
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RaceR86 wrote:

What is the max current the different Oshpark boards can handle? Are they able to handle up towards 30A?

0:)

I have no idea, but thermally the 70N02 may be getting close to the limit at 30A, it is only rated for 31A continuous at 4.5V.  If I were trying to run 30A I would not run the Led+ through the driver, instead running it directly from the battery.  You would also need some serious wires, springs, etc. to handle over 30A.  

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scottyhazzard
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Maybe put the emitter in a jar of mineral oil. In the center of the jar the heated oil will rise and make a thermal current to cool off the bundle of emitters. You could make a really nice camping lantern with that and a mayonnaise jar.

"Those who hammer their guns into plows will plow for those who do not."

tterev3
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WarHawk-AVG wrote:
Anyone know this guy or has seen this project?

http://tterev3.blogspot.com/2014/04/meld-v2.html
http://oshpark.com/shared_projects/e1nOdOdw

did i hear my name? i’m happy to answer questions about my boards if there are any. wish i found BLF earlier, you guys seem to be way more into diy than some other light forums i’ve been on…

CRANK
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tterev3 wrote:
WarHawk-AVG wrote:
Anyone know this guy or has seen this project?

http://tterev3.blogspot.com/2014/04/meld-v2.html
http://oshpark.com/shared_projects/e1nOdOdw

did i hear my name? i’m happy to answer questions about my boards if there are any. wish i found BLF earlier, you guys seem to be way more into diy than some other light forums i’ve been on…

welcome to the best flashlight forum on the internet Beer

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Hi tterev3, I generally would like to have the creators knowledge and approval before adding links to the op even though these are already posted as shared at Oshpark. That’s not always possible but glad to see you’ve registered so you can officially give your approval.

Antoninodattola, is that a board Mattaus designed for you? If so, then great. If not, then I’d like to wait on his input in case it’s for someone’s pet project.

Three Tanna leaves to give him life, nine to give him movement. But what if he eats the whole bag?

Scott

tterev3
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Hi Rufusbduck, go ahead and add mine. Here are the links and some other info on my blog (where schematics, source, etc. can be found):

MELD1: http://oshpark.com/shared_projects/Neu9UOHi
http://tterev3.blogspot.com/2014/04/meld-v1-boards-and-olight-s10.html

MELD 2: main board: http://oshpark.com/shared_projects/e1nOdOdw
SEPIC daughter: http://oshpark.com/shared_projects/xBTPj8sl
LED board: http://oshpark.com/shared_projects/p37Vo4vw
http://tterev3.blogspot.com/2014/04/meld-v2.html

and here’s another that’s not on OSHpark (i did it before they existed) but I’ve seen a few 4×7135 boards on this thread that would work with my code so i think it might be relevant: http://tterev3.blogspot.com/2012/10/super-rgbwuv-flashlights.html

thanks for organizing this thread!

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Hey tterev3! Welcome!

I was wondering where you sourced the UV leds you’ve used.
It seems the MELD will get a UV LED that fits on cree XQ pads. On the Super RGBWUV, might that be a “3535” UV led that fits cree XP pads?


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tterev3
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Unfortunately uv tends to be really expensive. I’ve been fortunate enough to be able to use some R&D parts for most of my projects but if I have to buy them the luxeon UV is a pretty good part, very high power. It will fit the Cree xq pad that I have on the led board

Rufusbduck
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Are the issues with Meld V1 enough to advise against ordering it or are both versions good to go?

Three Tanna leaves to give him life, nine to give him movement. But what if he eats the whole bag?

Scott

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tterev3 wrote:
WarHawk-AVG wrote:
Anyone know this guy or has seen this project?

http://tterev3.blogspot.com/2014/04/meld-v2.html
http://oshpark.com/shared_projects/e1nOdOdw

did i hear my name? i’m happy to answer questions about my boards if there are any. wish i found BLF earlier, you guys seem to be way more into diy than some other light forums i’ve been on…


Welcome tterev3…there are a BUNCH of absolute geniuses and artists here (I’m just the cheerleader Big Smile ), I stumbled across your build and video’s and about tripped on myself trying to find someone to invite you here to enter into the fray…with your expertise added to the pool…there is NOTHING you guys can’t whip up! I’m 100% positive on that!
scottyhazzard
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tterev3, I just watched the videos- Very cool. Do you sell or have you considered selling some of your drivers?

"Those who hammer their guns into plows will plow for those who do not."

tterev3
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Rufusbduck wrote:
Are the issues with Meld V1 enough to advise against ordering it or are both versions good to go?

I’d recommend going with v2. V1 has a flicker issue that can be solved, but it requires cutting a trace so small I needed to do it with a microscope. If you would much rather the single board solution, I could send you one of my v1 boards that I’ve fixed—I’m not really using them since I got v2 running. I’d let it go just for the cost of the components. Again v2 is a much better option though
tterev3
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scottyhazzard wrote:
tterev3, I just watched the videos- Very cool. Do you sell or have you considered selling some of your drivers?

I’ve thought about selling but I think the cost may keep most people away—there’s a lot of pricey components on the multicolor boards. If there’s interest I would certainly consider it though

scottyhazzard
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How pricey are we talking?

"Those who hammer their guns into plows will plow for those who do not."

tterev3
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I would estimate around $20 for a parts kit and maybe in the $40 range assembled

scottyhazzard
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I’ll pm you to not tie up the thread. Thanks.

"Those who hammer their guns into plows will plow for those who do not."

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The name here might be budget light forum but quite a few members wlill drop a good bit of money into a flashlight.


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http://75.65.123.78/driverhacks/Dsc07728.jpg

The vias are open, I can see daylight through them, but there needs to be some kind of sealant between the PCB & body anyway so that's really not a big deal. They're a little thicker than the originals but that's a good thing - the switch bezel will clamp the PCB tightly, compared to the stock parts where the PCB floats around even when it's all screwed together tight.

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Just got my 3× 7135-based SRK boards in today. They’re very nice. Not only do the purple and gold boards look great, they feel like they’re well made. I have my parts on order (though I may be waiting a little while for my 7135 chips from FastTech)

Overall, very pleased w/ OshPark (and shout outs to the board designers too).

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