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Old 07-02-2010, 04:41 AM   #1
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Default 445nm Pointer build with Laser Lock security system

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!










Last edited by Everett; 07-02-2010 at 10:50 PM. Reason: added a new photo after I finished my labels
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Old 07-02-2010, 04:49 AM   #2
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Default Re: 445nm Pointer build with Laser Lock security system

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
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Old 07-02-2010, 04:50 AM   #3
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Default Re: 445nm Pointer build with Laser Lock security system

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.
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Old 07-02-2010, 04:51 AM   #4
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Default Re: 445nm Pointer build with Laser Lock security system

Very well done! Impressive, you seem to have done your homework. I'm interested in learning how to do this myself. Thanks for sharing!
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Old 07-02-2010, 06:29 AM   #5
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Default Re: 445nm Pointer build with Laser Lock security system

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.
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Old 07-02-2010, 06:42 AM   #6
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Default Re: 445nm Pointer build with Laser Lock security system

Great work. Keep it up and people will be wanting to buy this interface from you.
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Old 07-02-2010, 06:43 AM   #7
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Default Re: 445nm Pointer build with Laser Lock security system

Excellent!! And open source too! Props dude!
I've been wanting to add a mcu to a build.
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Old 07-02-2010, 10:17 AM   #8
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Default Re: 445nm Pointer build with Laser Lock security system

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? (that's where I live) Or is that just your actual name?
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Old 07-02-2010, 11:55 AM   #9
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Default Re: 445nm Pointer build with Laser Lock security system

Neat design, and out of the blue as well. Cool stuff.
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Old 07-02-2010, 12:04 PM   #10
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Default Re: 445nm Pointer build with Laser Lock security system

That is amazing job.

Now we can make these high power lasers safer.
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Old 07-02-2010, 12:15 PM   #11
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Default Re: 445nm Pointer build with Laser Lock security system

+rep... you definitely deserve it
you should start making and selling these boards, especially to members with 445nm builds


but I'd personally use blue led as indicator
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Old 07-02-2010, 01:54 PM   #12
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Default Re: 445nm Pointer build with Laser Lock security system

Amazingly clever design, and i love the features.
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Old 07-02-2010, 02:52 PM   #13
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Default Re: 445nm Pointer build with Laser Lock security system

Very cool! +1
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Old 07-02-2010, 06:04 PM   #14
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Default Re: 445nm Pointer build with Laser Lock security system

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
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Old 07-03-2010, 03:15 AM   #15
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Default Re: 445nm Pointer build with Laser Lock security system

Well done. I think a few manufacturers could implement this. You made it on hackaday.com also!

+1.
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Old 07-03-2010, 04:48 AM   #16
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Default Re: 445nm Pointer build with Laser Lock security system

Quote:
Originally Posted by 3zuli View Post
but I'd personally use blue led as indicator
Wouldn't be able to see a blue led while wearing your glasses.
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