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RED laser from DVD-RW

B

boraicho

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Oct 13, 2013
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hi. i am dismantled today a DVD-RW how much current i have use for red laser and how much i have use for infrared laser. thanks.
 





SKeeZ

SKeeZ

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The infrared is almost not worth messing with but the red could take i would expect around 400mA. if you are too afraid of blowing it, use 300 or 350mA
 
crazyspaz

crazyspaz

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this has been answered many, many times.use the search bar at the bottom of the page. If you ask questions like this (that have been answered many times) before doing very simple and easy research of your own, you will get negative feedback from people. Please, research first, and if you cant find your answer, THEN make a thread.
 
The Lightning Stalker

The Lightning Stalker

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That would make a nice driver, if not a bit high in the parts count. You could put a capacitor across R6 to
get a soft start.
 
grainde

grainde

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Jan 29, 2012
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Try an AMC 350 mA driver. You can use a single chip, or buy a complete driver from Kaidomain, FT, DX etc:beer:
 
alessnilsen

alessnilsen

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For a 20~22X DVD-RW red LD you can put up to 400mA, I run mine at 400mA, but I gess 350mA is fine. :)

And never forget to discharge the 10uF capacitor!
 
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B

boraicho

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Oct 13, 2013
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Hi. you mean, that i have to put capacitor here?
http://fastimages.eu/images/currenryr.png

when i am built my first laser projector with steppers motors,
so i am proposed this laser driver with blanking for green laser diode from laser pen. it's very complex :shhh:

laser:
http://www.fastimages.eu/images/dsc034hyh.jpg
driver:
http://www.fastimages.eu/images/dsc034efe.jpg
scheme:
http://www.fastimages.eu/images/hardpowerl.png

as blanking source i am used TL494 so i can change frequency and PWM really interesting. i want to change whole module for a little processor but i fuck it.
 
The Lightning Stalker

The Lightning Stalker

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Yes. It helps stabilize the current. I'd like to see a video of all this working, especially since you're using stepper motors as galvos.
 
B

boraicho

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Oct 13, 2013
Messages
30
Points
8
i do not expect that it will be, as laser projector with galvo, but galvo is very expensive for my requirements and spirograph with DC motors already i don't want to use.
GreenLaserMAX - YouTube
 
Blord

Blord

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The current depends how old or what the write speed is of the DVD writer. The older ones can't take 350-400mA. It will burned out the laserdiode right away.
 
The Lightning Stalker

The Lightning Stalker

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I believe that is the famous long open can. Some of those can take upwards of 450mA depending on how
good of a heatsink they are in. Keep an eye (or a finger) on the heat until you know what your heatsink is
capable of.
 
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