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Hey guys, it has been a while. I can be frustrating to build a laser so I took a good long break from it and have resonantly finished. The entire build is pretty much the same as before I just bought drivers for it this time because broken diodes were becoming too costly. And as a bonus I...

So if I use a .8ohm 3 Watt resistor and properly heat sink it I should be fine?

But I'm not for sure would hooking up 8-9 volts to a 5V diode not make it light up and kill it instantly? I would imagine it would at least flash, I didn't see anything.

Well I had some success with the current driver. I used a higher current diode (not laser diode) as my RSET. That seemed to work pretty well, although it fluctuated quite a bit with temperature. I got between 1 and 1.3 amps from the current circuit depending on if I put the diode (diode that...

Yes I read up on constant current drivers vs. constant voltage drivers and now I understand why I need to use a constant current driver. Thank you very much. You may have just saved my second diode. :D What would you recommend I use? And how would I go from the 7.2 volts coming off my...

No I thought V=IR. So the only way to change current would be with the voltage because the resistance is constant (i know it goes up with temperature but i mean you cannot change the resistance). If there is something wrong w/ my logic please explain.

Hello, I am back after attempting my build. And let me tell you, it didn't go well:cryyy: . I accidentally destroyed my TI voltage switch, I'm not quite sure how I managed that. Fortunately I got a new one. I think it might have something to do with the order in which I attached things...

10.5 mm diameter X 19 mm long Would that mean I drill a 10mm hole? And would i need thermal compound?

I think this may be a better shaped heatsink for a laser, and probably easier to center. I'm pretty sure it is solid copper.

Here is the heat sink i was planning on using, I would probably cut it in half. It is made of solid copper. How would i go about making a hole to put the assembly in? Meaning what sized drill bit?

Oh ya and here is the TI switching regulator I am using PTH08T230W And the pdf in case you are interested. http://focus.ti.com/lit/ds/symlink/pth08t230w.pdf

That was with a previous build w/ a 250mw Red laser. And that was only because I bought it in a kit pre-assembled years ago. I'm using UltraFire batteries. That page was very helpful (bookmarked). Judging by the Over rating on the 3600mah (yielding only 2400mAh at .5A discharge). I'm...

My initial reaction would be to push it in as far as it will go but i think i've read on LPF that it's not necessary or it messes with the focus. I guess I could ask the seller. I would really like suggestions on heat sinks and answers to my driver setup.

Hello guys I'm kinda new to LPF and had a few questions on the build I am doing. I know my first mistake is buying my diode, enclosure and lens off the bay (i swear i will buy off LPF next time). - I am using one of those 445nm 1+ Watt diodes taken out of a DLP projector. - As far as housing...

Better then all ya's cakes :)