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Just curious what the concensus here would be, but we're looking at possibly getting a laser to etch part numbers at work. My thought would be to get a pulsed fiber laser. We'll mainly be etching non-hardened steel and/or cast iron. Just wondering if anyone here had any familiarity or pointers...

I've been a lurker for awhile, and just started messing around with these myself. Here's my question. I'm wanting to power 7 5mw red laser diodes using a 5VDC 1Amp adapter I have laying around. What resistor do I need to use in front of each laser to feed them 35mA each, to keep from frying...

I'm working on a project for church for our bible school this year, and I'm needing some help. I've been asked to make a laser maze. I don't think it will be bad, but I've got several cheap red diodes that I'm going to try to use. I'm going to run everything from an arduino. What I'd like to...

I'm working on a star projector for a friend, the blue diode in it has quit working. It's a 5mw diode, and I'm not sure where I can find another one that is relatively cheap. This one has overheated. It's pressed into a heatsink, but I think it still managed to overheat. I've got a small fan...

Blue Laser Lamp- with passive cooling technology by Richard Redpath ? Kickstarter So dumb question for you all, if a laser is over 5mw and using a diffraction grating, is it still unsafe for your eyes, without goggles? Would beam expanders work the same way, or would it matter, since the light...

Just curious, but we have a hydraulic based machine at work that is leaking pretty bad. Unfortuntely it is an older machine that isn't easy to get into with other oil based and coolant systems in the machine. I'm looking at running a uv reactant dye through the hydraulic system to trace the leak...

I'm looking for a couple of reasonably priced green goggles. I have two pair of blues OD4, but they're limit is at 530nm according to their literature. I'm looking at getting something in the 100-200mw range in 532nm. If anyone has suggestions of where I can get some of these reasonably priced...

Is there anyone around that sells 5mw pointer modules, aside from fleabay? I'm looking at making a led/laser EDC. I could harvest one from a pointer, but I figured I could find a decent quality module (O-Like or similar) on here somewhere. Also, if I got a 30mw module, would I need safety...