Help with Phatlight driver/build?

JohnTheRipper · 08-31-2011, 02:21 AM

Hey all,

I got a projector (minus diodes) for cheap, and I have extracted quite a few things, including the precious phatlight. Now I powered it up via my small power supply-- 2A @3V DC, and while that's quite nice for a quick test, I need to figure out a driver for it, and a driver for the TEC it's attached to.

If possible, a driver for the phatlight that I could adjust the current on-the-fly with a pot would be nice, but otherwise, I need something that can do maybe... Somewhere between 4-8A at 3V DC (that's what I want to run it at, right?). Anything in that range would be fine. And I have no clue what a driver for the TEC would look like, or what voltage it needs.

Basically, I need to know what drivers I need to be able to power:

1x Phatlight at around 6 amps input. Not sure what voltage, around 3V DC most likely.
1x TEC. I think it's 12V DC, not sure.
1x Fan. No clue at all what I'll need to run it as.

I'm not very good with drivers and voltage stepup/stepdown and amperage limiting, so advice would be great.

I don't mind buying from DX, in fact, cheaper is better.

I plan on using the stock heatsink and TEC and fan in order to achieve max heat conduction ability. I will either run this off of a bench supply, or mount it in a large roomy plastic host, with the fan installed and running from either a bench supply OR a large LiPo cell battery.

ARGLaser · 08-31-2011, 04:36 AM

Off topic, but were did you buy the projector? I think the TEC that comes out of the A140 is 5V, not entirely sure though.

JohnTheRipper · 08-31-2011, 06:09 AM

Quote:

Originally Posted by ARGLaser

Off topic, but were did you buy the projector? I think the TEC that comes out of the A140 is 5V, not entirely sure though.

Got it from Garoq for $35 shipped

.

You can PM him and see if he would offer you the same deal, I have no clue if he has more he can sell.

Wolfman29 · 08-31-2011, 07:10 AM

Well, what you CAN do is just use a single LT1083 (rated at 7.5A) and build a simple DDL circuit with it, using a REALLY beefy resistor. Would give you up to 7.5A of current, with a low-drop out linear regulator.

I figure, this way, you can *probably* get away with using two LiPo batteries.

LaZeRz · 08-31-2011, 07:23 AM

Direct drive, direct drive and direct drive

Yeh, as Wolfman suggested... Simple DDL circuit for both the LED and TEC, although, im not too sure what current the TEC's take... Guessing around 200-300ma??

bennett326 · 09-03-2011, 05:00 AM

im bumping this thread because i also need help

so can i direct drive of a 18650 i thought it would be too much voltage

08-31-2011, 02:21 AM	#1
JohnTheRipper Class 2 Laser Join Date: Aug 2011 Location: Illinois. Posts: 257 Rep Power: 9	Help with Phatlight driver/build? Hey all, I got a projector (minus diodes) for cheap, and I have extracted quite a few things, including the precious phatlight. Now I powered it up via my small power supply-- 2A @3V DC, and while that's quite nice for a quick test, I need to figure out a driver for it, and a driver for the TEC it's attached to. If possible, a driver for the phatlight that I could adjust the current on-the-fly with a pot would be nice, but otherwise, I need something that can do maybe... Somewhere between 4-8A at 3V DC (that's what I want to run it at, right?). Anything in that range would be fine. And I have no clue what a driver for the TEC would look like, or what voltage it needs. Basically, I need to know what drivers I need to be able to power: 1x Phatlight at around 6 amps input. Not sure what voltage, around 3V DC most likely. 1x TEC. I think it's 12V DC, not sure. 1x Fan. No clue at all what I'll need to run it as. I'm not very good with drivers and voltage stepup/stepdown and amperage limiting, so advice would be great. I don't mind buying from DX, in fact, cheaper is better. I plan on using the stock heatsink and TEC and fan in order to achieve max heat conduction ability. I will either run this off of a bench supply, or mount it in a large roomy plastic host, with the fan installed and running from either a bench supply OR a large LiPo cell battery. __________________ _________________________________________________ 405nm 70mw pointer from DinoDirect 445nm 1.2 Watt Survival Lasers I [Review] 532nm 22mw DX NewWish pointer 532nm 22mw pointer (butchered, still working) 532nm "200mw" DX module (bare module, wiring is a little weird, but the output is fairly good) 3x Red 1mw cheapy pointers All lasers have been tested (except for the SL I and the DX module) Like being able to see? Buy safety glasses! Eagle Pair 190nm-540nm at OD4 Eagle Pair (EP-1) S2 190nm-540nm at OD4 + 800nm-2000nm at OD2 _________________________________________________ Last edited by JohnTheRipper; 08-31-2011 at 02:21 AM.

08-31-2011, 04:36 AM	#2
ARGLaser Class 3B Laser Join Date: Feb 2011 Location: British Columbia Canada Posts: 3,956 Rep Power: 232	Re: Help with Phatlight driver/build? Off topic, but were did you buy the projector? I think the TEC that comes out of the A140 is 5V, not entirely sure though.

08-31-2011, 07:10 AM	#4
Wolfman29 Class 3B Laser Join Date: Jan 2011 Location: Scottsdale, AZ Posts: 3,200 Rep Power: 106	Re: Help with Phatlight driver/build? Well, what you CAN do is just use a single LT1083 (rated at 7.5A) and build a simple DDL circuit with it, using a REALLY beefy resistor. Would give you up to 7.5A of current, with a low-drop out linear regulator. I figure, this way, you can probably get away with using two LiPo batteries. __________________ Personal Collection: 405nm: Kryton Groove - 400mW 445nm: Solid Silver - 2.4W - Click Here! 532nm: O-like - 400mW - Rayfoss; 200mW 543nm: 1.52mW HeNe 589nm: PGL-III-C-589 - avg. 74.5mW, pk. 100mW 632.8nm: 5" HeNe Steampunk Raygun 660nm: Chrome Leadlight DIY Build - 225mW DIY LPM! Looking for a cheap, powerful buck driver? Check out the BlitzBuck at CajunLasers! With efficiency higher than that of a linear at approximately 90%, it's the best two-cell solution on the market! /shameless plug

08-31-2011, 07:23 AM	#5
LaZeRz Class 3R Laser Join Date: Feb 2011 Location: Sydney, Australia Posts: 2,443 Rep Power: 91	Re: Help with Phatlight driver/build? Direct drive, direct drive and direct drive Yeh, as Wolfman suggested... Simple DDL circuit for both the LED and TEC, although, im not too sure what current the TEC's take... Guessing around 200-300ma?? __________________ Stupid Australian Laser Laws.... Damn you customs How to remove the PCB from protected cells My Collection Of Beamshots and Laser Related pics! Feel free to message me for any help/advice

09-03-2011, 05:00 AM	#6
bennett326 Class 3R Laser Join Date: May 2011 Location: tennessee Posts: 1,944 Rep Power: 114	Re: Help with Phatlight driver/build? im bumping this thread because i also need help so can i direct drive of a 18650 i thought it would be too much voltage __________________ read these before starting a thread THE i want to build a laser thread [/LEFT] INDEX a work in progress my builds LPC in a diy host HERE phr build in a c6 HERE OTHER lasers/laser related things PT-30k galvos 300mW 532nm analog labby audiolase DAC(sold) Etherdream DAC review here coherent photons make me happy benneh: it might have been a dye laser pumped by a argon benneh: HOLY SH!T benneh: i am such a nerd ARG: AHHAHAHHAHHAHAAHA **need any super cheap paintball stuff PM ME ** Last edited by bennett326; 09-03-2011 at 05:00 AM.

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