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Old 06-18-2012, 02:07 AM   #1
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Default Building a 200mW Laser - Help

So, I'm a newbie right now to building lasers of any kind, and wanted to start with a 200mW. However, I was wondering - Do I need a driver circuit? I was thinking I could just put resistors on the diode and power it up from there. Sorry if this is rather obvious, but I need to know Thanks!
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Old 06-18-2012, 02:09 AM   #2
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Default Re: Building a 200mW Laser - Help

Direct driving generally isn't a good idea. It's an easy way to kill a diode. It's generally frowned upon here on the forums but it can be done. If this is your first time it's best to use a driver so you end up with a working laser.
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Old 06-18-2012, 02:16 AM   #3
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Default Re: Building a 200mW Laser - Help

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Originally Posted by ARGLaser View Post
Direct driving generally isn't a good idea. It's an easy way to kill a diode. It's generally frowned upon here on the forums but it can be done. If this is your first time it's best to use a driver so you end up with a working laser.
Thanks for the quick reply!

Have any suggestions for a good driver?
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Old 06-18-2012, 02:17 AM   #4
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Default Re: Building a 200mW Laser - Help

which diode are you planning to run it will help us tell you a good driver
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Old 06-18-2012, 02:19 AM   #5
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Default Re: Building a 200mW Laser - Help

Either 808nm 200mW 5.6mm,

...or whatever I can get out of a DVD Writer tomorrow

I'll have the info on that one sometime tomorrow.
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Old 06-18-2012, 02:24 AM   #6
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Default Re: Building a 200mW Laser - Help

808 will be no fun. You won't be able to see the beam, and the dot will be almost invisible.
The really bad thing is that even though you can't see the 808 light, it can still do lots of damage to your vision.
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Old 06-18-2012, 02:35 AM   #7
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Default Re: Building a 200mW Laser - Help


I strongly recomend against that...

Here's a great one for your first build
MITSUBISHI/658nm-660nm 300-400mw CW Red Laser Diode/LPC-826 | eBay

It's only 10$ & it's visible as well so you can see that awesome beam but you'll need goggles for red as its still strong
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Old 06-18-2012, 02:53 AM   #8
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Default Re: Building a 200mW Laser - Help

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Originally Posted by T_Warne View Post
808 will be no fun. You won't be able to see the beam, and the dot will be almost invisible.
The really bad thing is that even though you can't see the 808 light, it can still do lots of damage to your vision.
I'm planning on putting it in an Aixiz Module actually.
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Old 06-18-2012, 02:55 AM   #9
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Default Re: Building a 200mW Laser - Help

Putting it in an AixiZ module will not change the fact that 808nm is not very visible but still very dangerous.

Using an 808 diode is just silly. Get a red 650-660nm diode like AnthoT suggested. You will be much happier with the result.
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