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Hey guys I need some advice. I recently build a 2W M140 and I am having trouble with the beam. I am using a g-2-lens and I am able to focus the beam to a spot where it will burn through corrugated cardboard in milliseconds. However, inches away from the focused spot the divergence is way too...

So I attempted my first laser build, a M140 diode with a buck driver and became frustrated with my mediocre soldering skills. So amidst the frustration I switched the pos and neg wires from the battery to the driver and burned it out immediately. Stupid mistake, I know. Should have been more...

Hey my name is Adam, I'm 23 and I fairly recently got interested in lasers and the like. Just wanted to introduce myself to the community after lurking around some threads for a bit. Also wanted to say I am starting my first build! A 2W M140 from dtr. Hopefully I did not bite off more than I...