My first build :D

Hi everyone!! after a few years knowing about the existence of lasers, I'm ready for build my first killer machine xD :lasergun:

I'm thinking in a modulable power laser, with 5 states:
Lp, arround 20mw
Lp-Mp, arround 100mw
Mp, arround 200mw
Mp-Hp, arround 275mw
Hp, arround 300mw

All these states can be controled with a DIP Switch, connected to 5 resistors of 12 ohm wired to Lm317.
The diode is going to be a lpc-826 in a plastic case, lab style. Looks awesome




The schematic:


Specs:


Part lists:
Case -> 5X Durable Plastic Project Box Electronic Enclosure Instrument Case 100x60x25mm | eBay 1$
Heatsink + module + lens-> 650nm 5 6mm Laser Diode Module Host ?12MMX30MM Aluminum Host w H Heatsink Lens | eBay 5$
DIP Switch -> 10pcs Red 2 54mm Pitch Ways Slide Type DIP Switch 1 2 3 4 5 6 7 8 9 10 12 Bit | eBay 0.20$
Diode -> 660nm 300 400mW CW Red Laser Diode LPC 826 | eBay 10$

Total about 20$ (AWESOME CHEAP!!)

I need your suggestions and opinions. Thanks everyone!! :thanks:

Looks like a cool project, I would change the batteries to 2 x3.7v lithium batteries.
On your heat sink I can probably machine you something a little better than the one on eBay. Maybe something with a flat bottom.

Wicked budget build, variable power will be awesome too. Get some great duty cycles on low power

+1 on getting a better heatsink

im on the slow boat to china of knowledge myself and this is a super cleanly laid out build! I wanted to harvest a diode myself from a dvd burner but this option looks really good too.. and cheap wow. ide love to see more pics and updates!!!

New idea! Anyone know about peltier coolers?

http://http://bumboz.blog.com/files/2010/07/teceng.jpg

Are awesome with wall electricity (consume 60W). And I'm looking for a box heat sink. I have this two options, but i accept suggestions.

http://www.ebay.com/itm/New-TYPE-Pr...o_Audio_Parts_Accessories&hash=item35dbba741d

Or

http://www.ebay.com/itm/Heat-Sink-H...050?pt=LH_DefaultDomain_0&hash=item3cbaf6ace2

Or one from a lpf member.

And I'm thinking in change DPI for a rotary switch. What do you think?

Ok, peltier out (too much consumiption). I'm thinking in put a fan, but are rated on 12V. And the batteries, I will put 2 CR16340. I think that they're going to burn the diode