IR pointer build - Please Help

[mongolikebeans]

I am BRAND new to lasers. I have been doing some research on IR stuff but I dont really know where to start. I understand there are kits out there (this would be easiest for me as i'm not too inclined when it comes to this type of stuff) but i havent found an IR kit specifically. I'd love to swap the diode later as I only need the laser to be IR for a while. I also need it to be pretty powerful. I'll be pointing a pretty good distance(Several miles). I'd be very appreciative if someone could help. Thanks in advance!

 

[RedCowboy]

This instruction lays it all out pretty well and gives you pointers as to general sources for parts you will need.

(((( SPECIAL NOTE )))) **Always lase safely and wear the proper laser safety glasses for the wavelength you are using.**

 

[thanhtung]

You can try with diode IR 780nm in DVD-RW burner!
It has best divergence of IR with power from 150-250mW
You can use the LM317 with registor 3.9 ohm—>4.7 ohm for that!
Pls don’t set R < 3.9 ohm—-> diode will die soon
This is my build from 10 years ago