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Old 10-15-2009, 01:59 AM #1
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Smile Hi everyone ~ new member from NY

Hey I'm from NY, I'm a high school student. I've been interested with lasers ever since my dad took me to this awesome pink floyd laser light show way back when...I work on a lot of electrical engineering stuff with microcontrollers and digital circuits. I've made a few robots, MIDI controller,...you know, the usual haha.

Anyways, I saw some of the posts on this forum, and I'm astounded. I can't believe it can be so cheap to make a laser! I've drooled at the lasers on websites like wickedlasers.com, but I simply don't have the money to burn (no pun intended!). I own a 5mw wickedlasers 'core' green laser that I got when they first came out, and it's pretty cool, but it doesn't burn stuff! I want a laser with 250-300+mW of power. I just popped open a cheap-o DVD-RW drive, and found a nice red laser with a very nice collimator lens assembly and heat sink! What do you think the potential power output of this one is? This tutorial here (where I first got the idea): Laser Flashlight Hack!!
says it can be ~245mW? What are my best options right now for building a good laser pointer that's capable of 250-300mW+? I have stuff I can use for heatsinking, and I can even arrange a circuit that uses PWM (pulse width modulation) along with power transistors to keep the diode from dying from extended use if necessary or if it even helps. But I want it to be reliable enough that it will last. And I don't want to spend much, really, I'm broke!

Thanks for any help!


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Old 10-15-2009, 05:45 AM #2
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Default Re: Hi everyone ~ new member from NY

Buy a dilda...its cheaper.

http://www.o-like.com/b2b_cpinfo.asp?id=971
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Old 10-15-2009, 11:01 AM #3
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Default Re: Hi everyone ~ new member from NY

Hey another New Yorker! Whereabouts are ya?
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Old 10-15-2009, 01:55 PM #4
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Default Re: Hi everyone ~ new member from NY

hello and welcome to the forum.

enjoy your stay here. Have a nice day..

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Old 10-15-2009, 10:04 PM #5
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Default Re: Hi everyone ~ new member from NY

Thanks for the warm welcomes lol. One question though:

What about my question RE: what I can do with the diode I've got? Can you guys read that second paragraph of my blurb and help me out? I've read around in the forums here, I promise! Thanks.
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Old 10-15-2009, 11:07 PM #6
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Default Re: Hi everyone ~ new member from NY

We're needing the same info you do in order to know what the diode can do. What brand and speed was the DVD burner? That can tell us a lot about the diode.

Our stickies and faq's have lots of info on red laser building ... Or, you could, as TJ suggested, get the Dilda. It's a great little laser. Alternatively, you can get diodes, drivers, hosts, kits, etc. right here on LPF.
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Old 10-15-2009, 11:21 PM #7
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Default Re: Hi everyone ~ new member from NY

Ok. It was a 'JustLink'/'Aopen' RW5120A DVD+RW (supposedly only 2.4x write speed...it does not say on the actual unit, but that's what a google search turned up...). That IS a good deal for that 'Dilda' laser...although I want to see what I can do with this diode I've got. I know I can build a driver with components I already have, and an LM317 adjustable voltage regulator. Thanks for your help
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Old 10-15-2009, 11:48 PM #8
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Default Re: Hi everyone ~ new member from NY

Hey there DIYMaster.

2.4 or 24 write speed? Anyway... it will make a great diode to practice with. I guess the best way to learn is to build your driver and hook it up... see what happens.

Good luck!
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Old 10-16-2009, 12:46 AM #9
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Default Re: Hi everyone ~ new member from NY

You'd think 24x, but all places I have seen on the 'net say 2.4. Is this driver adequate, and will it keep it from dying reliably?
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Old 11-11-2009, 08:49 PM #10
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Default Re: Hi everyone ~ new member from NY

Welcome there

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Old 11-11-2009, 08:57 PM #11
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Default Re: Hi everyone ~ new member from NY

Stop spamming, buddy.
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Old 11-11-2009, 08:59 PM #12
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Default Re: Hi everyone ~ new member from NY

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Stop spamming, buddy.
I just made a thread about it on the ohters section
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Old 11-11-2009, 09:31 PM #13
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Wink Re: Hi everyone ~ new member from NY

Hello there DIYMaster fellow New Yorker welcome to the greatest forum !

Have fun ! & remember safety 1st !

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