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Old 04-14-2011, 03:45 PM #305
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

If you had to heatsink just one side, go with the resistor side. For the DX copper heatsinks use the flatside ... personally I would remove their sticky stuff and use arctic alumina so I can fill in the spaces between ans around the resistors. Be careful not to short the resistors though, use plenty of epoxy and don't press down all the way.


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Old 04-14-2011, 03:54 PM #306
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

How do you short the resistors? don't wanna do that...

So really just take the sticky stuff off, throw some arctic silver on it, and just press the driver to the heatsink? That was my plan
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Old 04-14-2011, 05:17 PM #307
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

Quote:
Originally Posted by jakeGT View Post
How do you short the resistors? don't wanna do that...

So really just take the sticky stuff off, throw some arctic silver on it, and just press the driver to the heatsink? That was my plan
Yup ... just don't press it so hard to the resistors that the heatsink makes contact with their metal tabs.
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Old 04-15-2011, 05:13 AM #308
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

I should of bought some of those copper heatsink things, their pretty cheap but since my dad has already pretty much payed over 300 dollars just for me to make a few lasers i dont think it would be wise asking for more lol I have an awesome Dad

I would pay him pack but he wont accept it....

i was also gonna buy some artic silver of fleabay but the seller only shipps to the US how racist

i will just drop by my local PC shop and pick myself up a 5g tube for 14 bucks






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Old 04-15-2011, 05:55 AM #309
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

Ok ... I know some of you are clamoring for these, so you guys get first dibs on them before I put up the FS thread. This driver is based on a LD1085 Low Drop Out regulator from STMicro rated for 3A. They are strictly set at 1.815A, and require 2x li-ion cells that can handle the the current draw (I don't recommend anything less than 2x18650s). These will need a nice chunk of metal to heatsink to, and I left plenty of copper area on the bottom layer to do so.

$15 each, limit 2 per person.



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Old 04-15-2011, 10:14 PM #310
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

Quote:
Originally Posted by jib77 View Post
Yeah a few shipped Saturday ... but dang, how the heck did yours make it in what is basically 1 day. I dont think I could get faster delivery in my own town ... sheeez.
was mine shipped on saturday by any chance? so i know when to expect it
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Old 04-16-2011, 01:31 AM #311
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

What is the second picture (future pic)? Is it the same as the 1.3 and 1.8 drivers, but has adjustable ranges? I seem to remember you talking about these. Will they still require 2 Li-Ions? Thanks

Quote:
Originally Posted by jib77 View Post
Ok ... I know some of you are clamoring for these, so you guys get first dibs on them before I put up the FS thread. This driver is based on a LD1085 Low Drop Out regulator from STMicro rated for 3A. They are strictly set at 1.815A, and require 2x li-ion cells that can handle the the current draw (I don't recommend anything less than 2x18650s). These will need a nice chunk of metal to heatsink to, and I left plenty of copper area on the bottom layer to do so.

$15 each, limit 2 per person.



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Old 04-16-2011, 01:55 AM #312
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

yeeahh .. you bridge resistors together to select a "range"
and its still a linear driver.. not a boost driver so yes.. 2 cells
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Old 04-16-2011, 02:36 AM #313
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

Thought so.... still looking for a substitute for the difficult to find flexdrive...like everyone else
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Old 04-16-2011, 04:27 AM #314
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

I have a fixed value buck/boost driver design but the parts are too expensive to make any significant quantities and its difficult to build by hand. I would have to charge a lot more than what other buck/boost drivers go for.

Bluuray is correct, it needs 2 cells for most anything except reds below 400mA. Those you can get away with a high quality low resistance cells. I havn't decided on a final mix of resistors ... I just put some that I had in my parts bin. It is based on the LM1117 chip.

Quote:
was mine shipped on saturday by any chance? so i know when to expect it
No, yours shipped on the 11th.
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Old 04-16-2011, 10:28 AM #315
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

ahh okay, should be here in a few days i hope
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Old 04-17-2011, 05:21 AM #316
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

Hey Jib, I recieved my drivers today!!! Thanks!

Awesome, and I already made a build with the usual Aurora host that everyone uses...

But, the diode I had was a victim of ESD and I only found that out after I soldered everything up. Even though I used every precaution, it still died. Sad day...
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Old 04-17-2011, 07:59 PM #317
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

what would happen if i used 3x 10440 3.7v 600mAH batteries? would i damage the driver or diode due to high voltage?
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Old 04-17-2011, 08:01 PM #318
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

i think he is using 10v caps.. so NO..
only 2 cells
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Old 04-17-2011, 08:23 PM #319
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

ah okay
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Old 04-18-2011, 01:00 AM #320
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Default Re: FS: LM1117 Linear Driver - 1.3A Fixed

Hey Jib, have you ever considered putting a potentiometer on the board for current adjustability?
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615mw 405nm/12X Spiderfire X-03
148mw 405nm/GGW in my "Hotlight-Saber" host
1920mw 445nm River Rock custom
1530mw 445nm Yobresal
1360mw 445nm Qumefox Sipik
800mw 445nm WL Arctic Spyder S3
240mw 473nm CNI Labby
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528mw 532nm Lazerer Cannon
310mw 532nm Firedragon III
300mw 532nm CNI Labby
180mw 532nm SKY Laser
4x 147-267mw 532nm Waterproof
900mw 635nm in Temporary Finned Labby Sink
Several 635nm diodes awaiting a build
500mw 650nm Dual LPC-826 Labby
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