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I had a 405 303 that wasn't insulated from the host. 532nm (808nm pump LD) are case positive, 650 are case negative, usually, 405nm and 445nm LD's don't have anything connected to the case pin. Your result is correct, if the 303 was 650nm, then it MUST be insulated from the host, or else the...

Now I understood, you're running the LD only with the housing, if the LD isn't getting hot, then there's no problem. Yes, the horizontal lines are from the diffraction grating, if you focus it with a lens, every horizontal line will be a small spot with a bigger one in the center. Remove it...

This housing is just a enclosure, it don't provide any good heatsinking, you will need found a way to attach it in a heatsink, here is the way I did it. There's a thing that you need to do before using it, you can see a small black piece holding a diffraction grating? You will need to...

Then the plastic insulation is absolutely useless, as you can see, neither the "+" and the "-" of the LD touches the case, this says that the case is independent from the LD itself. Yes, assemble a dummy load and post your results, boost drivers can't drop the tension correctly in order to...

Yes, it will be emitted at the same direction, the focal point will be very close, but not the same, if you don't look at the red then you will not look at IR too. If you will burn things, I'll suggest that you set the focal point away from the lens, since smoke can get in it. The focus point...

Yes, sadly, seems that your diode are really toasted, now it is a very inefficient LED, what explains why it dims when you increase the current. Can be that this LD is a case negative, here are the two common types: You can find it by trial and error, since the positive is always the same...

I'll guess 100mA, if this laser was capable of burning, then the LD could be generated a considerable amount of heat, and this little heatsink may not have been enough. Never seen one assembled this way! Use a dummy load to test the driver, and if it works, you will be able to know the output...

Hi! :yh: I generally use 400mA for those diodes from DVD-RW, since is a unknown diode and we don't have a output power vs current graph, I'll suggest that you keep the 400mA, you should get a good lifespan, you could get more power with 450mA, but your diode can not last that long. Most IR...

I think the output will be the same, because, usually, the LM317T needs 3.0 ~ 3.5V more than the voltage dropped by the LD, so, 2.5V+3.5V = 6V, this will be the minimum voltage that the driver will need to supply 400mA of current. I've disassembled a couple of DVD-RW, those LD's with 4 leads...

I had one of my batteries leaking a strange fluid from a little hole that I accidentally made in the "-" of the cell, that smelled like PVC pipe glue, it still working, but I wonder if someone else had this experience before. The brand is JWS and the cell don't have anything written in it. I...

Welcome to LPF! :wave: :beer:

Wow, what a set of nice looking unique lasers! Ok, I ever build my lasers with things I already have around, and the result are very interesting, my main material is MDF, but I can use anything to make a laser: Old ones: (red closed can at 150mA, LM337 driver) (LPC-815 at 415mA, LM317...

My 450nm 1,4W was the more expensive laser I built, that because I needed to buy two LD's (because I burn't one), U$110 (double it for R$), including the module, driver, heatsink and the two LD's.

Brazilian Portuguese (main) and English, I'm only good to read and write in English, what is enough for me. :yh:

Hello! :yh: I finished my too, and I used the same method that you said, and I got a good result (this took some hours). I put my laser into a window pointing to a wall, as far as possible. I think this will not be accurate, unless if you could look to the spot using binoculars (only when...

Nice to know! :yh:

I'll take a look! Thanks! :yh:

Welcome to the forum! :yh:

Re: First build in Aixiz module (not a cute laser) :thanks:

Re: First build in Aixiz module (not a cute laser) Good, I tried my best to explain my problem, I don't know how to explain it in a best way. In my case, the lens needed to get further from the diode, what I think is the opposite problem that some persons have had. But, I solved it, I don't...