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Couldn't help myself.... I popped the thing open, cut both covers over the sled back so I could get to the raw beam. You can interrupt the beam to the chip, it will still work fine. (for some reason I thought it would have a failsafe, some sort of pickoff or something.) There is a waste...

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Copper has a thermal conductivity almost 4 times that of aluminum alloys (There is a big difference between aluminum and aluminum alloys. I can guarantee that every single heatsink sold on this site is an aluminum alloy, not pure aluminum. The thermal conductivity of most aluminum alloys is...

The fact that he is selling the lenses from the projector as G-2 lenses is super sketchy. He obviously knows the "laser terms" and is passing something useless off as something more desirable. I also have no idea how he is selling lasers on e-bay. They don't take too kindly to anything over...

Solidworks has a little suite of add-ons called solidworks simulation, you can set specific materials and points of heat generation and run simulations that will show you the temperature of each part over a period of time. A while back I modeled a 5.6mm diode all the way down to the die itself...

Re: PRICE DROP: FS: Damaged 445nm Diodes, $20 Yep, trying to warranty such a thing is pretty tedious. You might be better off sticking a cheap driver in the back of an aixiz module and sealing the thing shut somehow. The PHR and 12X argument is flawed, the PHR is a new undamaged diode. You can...

I deal with issues like that on a daily basis, I think I have become a little better at picking out the flaky ones because of it. In the future, ask for some R&D compensation even if it's not much. That should weed out the tire kickers from the ones who are ready to get to business.

It's going to be a pretty common thing for laser sites to stop accepting paypal if that is actually what is making them quit selling the things. Be sure you know your bank or credit card co. chargeback policies before you buy anything. Debit cards don't always offer the same protection as a...

Re: PRICE DROP: FS: Damaged 445nm Diodes, $20 You are asking half the price for a diode that does a lot less than 1/4 of the power the rest can, plus you have no idea how long they will last in this "zombie" state. I think a warranty wouldn't be too bad of an idea especially considering your...

I discussed manufacturing a lot of the things for him but his flakiness made me back out as well. If I remember right he was the one who wanted a bunch of really cheap lasers with pressure switches for some sort of tool right? Sorry you wasted your time, at least your not out anything else.

Putting the laser that close to the TEC is the perfect way to skew results in the laser's favor. Back it up about a foot and try again.

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Its LED.

From what I understand they are switchmode power supplies. They don't like running without a load, just like any switchmode laser diode driver.

He was well within his right, he has no idea if you are some dumb kid that plans on lighting the canoe up next. You were also breaking the law, your laser was breaking FAA airspace without a permit. If you must use a laser outside use it when nobody else is around. If someone moves into your...

That is a bonded crystal set. The chances of you finding a bonded crystal set that handles 2W of pump power are slim to none. Besides, the datasheet shows that the output is 40-100mW. If the efficiency is 20% that puts your pump rage at 200-500mW, much more than that will destroy that tiny set.

Lower voltage + lower current = less heat What was that diode making at 1.4A?

Exactly! I was using a 60W woodburning iron as my main soldering iron for a while, I just ground the tip to a point and continued to do so as it needed it. I soldered a few diodes with that iron with no problem. Circuit boards were a little more tricky though, it would cook the board and lift...

My bad :beer:I didn't mean to sound so accusing. I'll drop it now :shhh:

Was the OP so advertisement-ey or did you edit it that way? I'm pretty sure I would have commented on that if it was like that to begin with.