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445nm Pointer build with Laser Lock security system

Everett

Member
Joined
Oct 2, 2007
Messages
12
Points
13
Here's my latest laser build:
445nm projector diode
Flexdrive @ 700mA
IMR 16340 Li-ion
DX 1x123A flashlight host

The thing that makes this pointer really special is that it is the first use of my Laser Lock system to increase the safety of the device. I have used a PIC 10F206 microcontroller and 4 other components to create a system that controls whether the Flexdrive gets power from the battery. The tailcap switch now forms a safety switch, and I have added a momentary switch and an LED to interact with the Laser Lock. Laser Lock requires an access code based on a short series of presses and clicks in order to arm the laser. It uses the LED to give the user feedback, indicating the events: safety off, incorrect code, unlocking, armed, and firing. The system also implements a momentary and a constant mode, and an automatic shutdown in constant mode. Here's a video that goes over the operation:

YouTube - Everett's Mini-Projects: Laser Lock

This was a challenging build due to the space constraints, but it came together well. There is a custom aluminum heatsink holding the lens module with a glass lens. All of the electronics are mounted to this heatsink as one unit that drops in from the front of the body. Because of limited space, I did not use a PCB for the Laser Lock electronics, so the circuit is built with loose components and wired point-to-point with 29 gauge wire.

Since LPF has given me so much useful information in the past, I want to share this system with the community in case anyone else is able to make use of it. Below are some build pictures along with all my documentation of the system. I have also included a design for a PCB that can be made at home using the toner transfer method, and I will make my source code available to anyone that is interested. It is written in PIC assembly and fairly well commented. The whole code is only about 260 instructions. I would also be willing to provide programmed chips or perhaps a populated board if there is interest.
Thanks for reading!

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cut4.jpg

UI.jpg

electrical.jpg

cut1.jpg

cut2.jpg

heatsink.jpg

pcb.jpg
 
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DiRollin

New member
Joined
Jun 15, 2010
Messages
140
Points
0
Jeez well done!!! One of the nicest looking compact portables I've seen! With the 445 OMGGGGG..> DROOLING.... That laser lock system is pretty impressive I might add... I wish I had a engineering mind like that :bowdown:
 
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Kevlar

Well-known member
Joined
Apr 26, 2010
Messages
1,353
Points
48
Very nicely done!!! I'm sure there are people on LPF with the know how to do this but this is the first time I have seen this implemented in a build. +1 rep.
 

Ramsey_innovations

Active member
Joined
May 10, 2009
Messages
379
Points
28
Very well done! Impressive, you seem to have done your homework. I'm interested in learning how to do this myself. Thanks for sharing!
 

viperx1101

Member
Joined
May 6, 2010
Messages
427
Points
18
I must also comment of the detail and thought put into this build. GREAT JOB!!! You have definately constructed a wonderful 445nm laser with a great safety system!!!

I am going to school now to become a mechanical Engineer. I can only hope to have such a creative and techinical mind as you after I learn all there is to know from my classes. I hope to build something like this for my lasers in the future as well. :yh:
 

Meatball

New member
Joined
Feb 1, 2008
Messages
2,987
Points
0
Great work. Keep it up and people will be wanting to buy this interface from you.
 

HaloBlu

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Joined
Dec 27, 2009
Messages
1,323
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Excellent!! And open source too! Props dude!
I've been wanting to add a mcu to a build.
 

mikeeey

New member
Joined
Jun 7, 2007
Messages
1,771
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0
WOW this is amazing! I couldn't ever imagine successfully building a laser like this.. you have skills.

By any chance is your username named after a city.. such as... Everett Washington?:p (that's where I live) Or is that just your actual name?
 

ReNNo

New member
Joined
Mar 27, 2009
Messages
589
Points
0
That is amazing job.

Now we can make these high power lasers safer.
+1 rep
 

3zuli

Active member
Joined
May 30, 2009
Messages
810
Points
28
+rep... you definitely deserve it :beer:
you should start making and selling these boards, especially to members with 445nm builds
:gj:

but I'd personally use blue led as indicator
 
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Ref

Member
Joined
Nov 25, 2007
Messages
178
Points
18
That's awesome, man. Maybe you could design a host that uses one of those glass fingerprint readers built in to laptops, these days (just send me one if you actually do it *wink*). =D
 

dnar

New member
Joined
Jun 7, 2010
Messages
609
Points
0
Well done. I think a few manufacturers could implement this. You made it on hackaday.com also!

+1.
 




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