So I've pretty much built a laser, but the only problem is, the beam isnt focused. If it helps, I'm using a dorcy jr for host and I have my diode in an Aixiz module. (btw I tried searching and didn't get much =/)
without using a multimeter or something like that? My parents don't really want to spend the money for that.
Is it always going to be as this picture shows it? I got it from somewhere on this site about a week ago. I don't really remmeber where ^^"
Thanks!