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Just want to say that I still have an almost full tank of CO2 lasing gas mixture and a regulator and other misc stuff if anyone is interested. I hear helium is very scarce these days so this gas will be hard to source (it has some helium in the mixture).

Did you find gas for it? I had quite a heck of a time finding it myself. I have a tank, almost full, and regulator if you are interested.

I've ordered probably 15 times and had no problems. You get what you pay for I guess.

So far just manual control. I was thinking of using Arduino. I'm still trying to think of some clever and cheap DIY scanner, using speaker drivers. I have them laying all over the place at work.

No, no sarcasm. Here is mine: https://www.banggood.com/RGB-300mW-White-Laser-Dot-Module-Red-Green-Blue-638nm-520nm-450nm-TTL-Driver-Modulation-p-1252293.html?rmmds=search&cur_warehouse=CN

Oh, SNAP! I thought it was one of the many floating ads! Due, you really went whole hog.

Which RGB module are you using?

Yipee Cayay!!

Yes, I have seen that done on YouTube, using a balloon and calipers or something to measure diameter and calculate volume. I probably will try that but just thought this would be simpler to start. Does the pressure in the resonator change as the balloon deflates? You didn't mention N2? Is...

SOLVED I found a supplier. SCI Analytical (http://scicalgas.com/). They will mix whatever you need and ship it. Prices seem reasonable, and they are very hobbiest-friendly. I'm going to start with a known good mixture and get everything else working, then maybe experiment with my own mixes.

I may try that, it is hard to find a blend from these industrial sources, if you don't own a business

If the CO2 levels in the air go up enough, maybe I can use it for my CO2 laser! (and aim it at Anthony)

I found this on Alibaba: https://www.alibaba.com/product-detail/Laser-and-electric-light-source-mixed_60832442256.html?spm=a2700.7724838.2017115.169.66a442a7M899yF

I wonder if I just procured the individual gasses, and went into a welding or neon sign shop and asked then to blend it for me...?

Thanks for responding. As I said, I'm talking about a blend of gasses. They don't sell CO2 laser blends at a party store (unless parties have gotten a lot more "rad" since I was young! I have searched on Amazon, Ebay, Alibaba, various commercial companies (mostly they don't respond or want...

Does anyone have a good source for CO2 blend for flowing laser tube? I have been looking but struck out so far. It doesn't help that there is apparently a Helium shortage right now. One company that does have it said they are only selling to hospitals and large accounts right now because of that.

If you go up to the $100 version, it shows a power supply. That one is also a 30 k version, probably the one to go with for a cheap starter (?)

I have an 8 ch 96kHz capable sound card so no issue there. yes, maybe some inexpensive sw to test it would make sense.

I wonder if a single multi-tap transformer would work? For vacuum pumps, do you think the el-cheapo HVAC ones you can get on Ebay for $120 would work? It is hard to find specs on what they will pull. Is Robert Ianinni the same one who did the CO2 laser plans form Information Unlimited? I have...

I think my general approach will be to start with a small pre-made tube, then build a short one from scratch, then a longer one. This way I can get the gas mixture, vacuum and high voltage parts and general safety figured out on a known working tube. The second tube will be same length as the...