A little back story. I'm 22, and I have been cursed with crummy genes, which equate to me starting to loose my hair. I have never one bought creams, gels, pills, treatments, or anything like that. When I heard about laser hair regrowth, I decided I had to check it out and see what was involved.
So I decided to leave a detailed account of my low budget prototype.
Please note that this is only a prototype, a proof of concept if you will.
Also this should go without saying but... DON'T mess with lasers, lasers will destroy your eyes, I know people who worked with lasers, and did not use proper eye protection and now have irreparable damage. They are dangerous, even laser pointers. Don't build this device, I don't know if it works, it could be harmful for all I know. At the time of writing this instructable, it is untested. Its a bad idea to do any sort of self treatment of any kind without consulting a doctor, a lawyer, and prime time medical drama.
I am not responsible if you choose to build this.
Step 1: Things you'll need
Desoldering Iron (ya know you'll mess something up),
Some things you'll need
Lasers @ ~660 nm
A big hairbrush
Box of electronic junk (for switches, wires, pots, etc)
Circuity to drive the lasers (option depending on the setup)
A sense of adventure!
Also most of my information came from this article that I found floating around somewhere online.. Laser hair therapy It filled in all the gaps for figuring out what needed to happen.