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I could do that. But I want to fit the whole thing inside this torch case I even got the perfect 10440 battery to power it . The driver is also done only the connection is the issue.

I think it's definitely case negative as the negative terminal does not have a isolation like on other terminals

I don't know myself it's an open can diode from an old dvd burner "DH- 16A3L". It could be case positive or neutral. How do I check safely?

I think I might not be able to do that as the body of the diode which is in contact with the module is possibly negative. If that's the case it's definitely not possible unless, you isolate the diode from the module which would be bad for the diode

Thanks for your reply, I understand but the problem is its the other side (negative) of the laser diode which is in contact with the case. I.e the body of the diode in contact with the module and module with the case

So I hammered my laser diode into one of those modules so now the lasers body is in contact with the module. The problem is, my torch case is also metallic and I just recently came to know that the back cap of the torch with the spring uses the metal case as the conductor itself and as far as I...

Hey y'all, I'm new to laser stuff I want to build a burning laser out of my old 16x dvd rw. But before that I understand the priority of safety. So, I want to make my own safety glasses. Can I get any help for what materials I can use and where I can get them?