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Hey guys! I recently noticed some cool looking 505nm diodes I have wanted to build a laser pointer for a while now, and when I came across this, I just had to do it! I already have two red 200mW pointers and a 405nm violet one (same power, also my first one), and so I have a bit of experience...

I'm trying to get a steady stream of 12 volts for a project I'm working on, and I am too broke to buy a variable power supply, so I found a 240v to 9v wall adapter, but I want to use a capacitor to step it up to 12v. What capacitor would I use, and could I combine a 5v power supply to get it to...

i pulled a laser diode from a dvd RW but i have no idea how to power it. can anyone nerdy help? here is the diode: and here is some of the optics / host anything helpful would be great thanks

i have a 405nm laser that shoots an awesome beam of purple at 250 mw, and i was wondering if i could somehow pump more power into it, by feeding it a more powerful version of an 18650 battery. i think i could get more power from giving it 2 CR123 batteries, but i'm not sure if that would be...