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I appreciate all the good information here. Thanks! I've done a bunch of searching around, and I still have a couple of little questions if you'll indulge me. Most sources seem to say 6 1N4001's for 405nm, 4 diodes for 650nm, etc. 1. I gather that the diodes simulate the voltage drop across...

https://sites.google.com/site/dtrlpf/home/diodes/s06j-12x-405-diodes DTR sells some quite reasonably priced in my opinion. I like the welding curtain idea, but you may be right Speedy78. It might be best to simply enclose the whole thing opaquely. I love watching my 3D printing and CNC...

I haven't built an enclosure yet, so I'm fairly open in that regard. The machine is on a table in my tiny apartment, so it would be nice to not wear safety glasses every time I'm at home with it running. If it came down to that, I would just build an opaque enclosure. The laser is downward...

I'm building a small CNC laser etcher for darkening wood, cutting paper, etc. I'm planning to use a 405nm 500-1000mW diode. I value my eyesight very highly, but I also would like to view the machine in operation without having to wear glasses every time I'm near it (a lot). Any economical...