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As far as I can tell that uses a load of LEDs spinning around the inside of the dome to create a persistence of vision effect (POV) which makes it look like there is solid text. It doesn't use any lasers or mirrors or anything along those lines so im pretty sure you wouldn't be able to make a...

Good idea but im pretty sure all of the optics would be AR coated for 808nm which would result in some serious losses at 445nm. Im not too sure if fiber optic cables are AR coated/built for certain wavelengths but i've got a feeling they are, that would be another large amount of power lost...

Yep, I bet it would be possible to air-cool CO2's just like argon lasers if you wrapped a big heatsink around the bore of tube and pointed a rather large and noisey fan at it. I suppose water cooling just provides convenience in the tight spaces where these tubes are normally used. Well, that...

I just use a small plastic tub with about 2 to 3L of water in, so far i've never been able to heat it above about 35C or so even with 5 to 10 minute runs at full power with a 40w tube. It always amazes me just how much energy it takes to heat water...

I remember when I first got it the OC was a perfect mirror, seems to be somthing that occurs from usage. Good to hear it's normal. :thanks:

It's a 40w tube from coletech(ebay), homemade power supply and water pump is: 12V DC CPU Cooling CAR Brushless Water Pump DC40A-1215 | eBay UK Although its a 12v pump I usually run it at 5v and haven't had any overheating issues with the laser, yet.

Ok, thanks. I thought the same, but didn't want to risk it just incase.

Just after setting up my co2 laser (Its normally sitting in the box it came in) I did a quick test on the coolant system, I turned on the water pump and sure enough water started to flow through the tube. Everything was fine, for about 5 seconds... The hose connecting to the tube at the output...

Ha, you can tell it didn't like that, it was hissing at the end :P

Ahh right, well good luck with your project :)

No problem :) If you need any more info just ask. Just make sure you're safe and know what you are doing, that power supply will nock you dead before you even notice, the laser will set paper/your carpet/your cat on fire in less than a second and then probably go on to burn your house down if...

Ok i really think you need to go learn how CO2 lasers work before you go and buy one... The laser light itself does not touch the glass of the laser tube at all, it travels up and down the tube, never reaches the side. There are mirrors at both ends, one that reflects the laser completely and...

Ahh right, didn't think you were that new. Yeah just connect the positive (thick red) wire to the side of the tube with the smallest electrode (almost always the end opposite to the output) and the negative (usually either blue or black on those power supplies) to the other end. There should be...

Other than somthing to keep the tube cool it looks like you're all set. For my 40w tube I use this 12v water pump to re-circulate some ordinary tap water through it and into a fairly large container(3L or so). In terms of eye protection I use standard cheap polycarbonate saftey goggles, as far...

Impressive repair :D I tried this myself earlier today, the whole thing just turned into a blob of solder :(

Yep, all the bond wires are gone, unfortunatly :( 500ma? Thats still one hell of a lot of current for wires those size. Suprisingly, the die does seem to be standing up to this treatment quite well. I expected it to crumble during my 'delicate' (:na:) de-canning process. Think i'll give up on...

Oh dear, Those guys over on the 445nm laser section are going to hate me for what i've done to one of their beloved diodes... It's amazing how those wires can handle 1 amp or more in the first place, they are thinner than a human hair... Well, i tried my best. (And made one hell of a mess) I'll...

Of course, no home is complete without a functioning 40w carbon dioxide laser :) In response to the taking off the rest of the can; I'll have a go, i'm not really sure what tools to use to get it off though... Ha, neither do I. Thanks anyway though :D I'll go warm up the soldering iron, i'll...

Krogith thanks for the tips but im not really expecting anything out of it so im not really botherd if i mess up. If it emits a single photon from this point that'd be a bonus for me. It was running about 1.5A. The only heatsink was that bit of metal i was using to mount it with, but i did have...

After having far too much fun with my 445 about 6 months ago i was greeted with a brief flash of white light and then nothing. I'll assume my driver went short circuit and let all the current from my 7.4v lithium-polymer battery into my diode... Heres the host (before it died): Today i...