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Old DVDs laser diodes

You can buy good red diodes for cheap, plus they will be brand new and you can power them with a pair of AA batteries in series, the internal resistance of the laser diode will usually allow you to get away with it but it could shorten it's lifespan, or just buy a cheap driver.

Just remember safety 1st, any laser over 5mw can damage our eyes.

www.ebay.com

5pcs LPC836 650nm 350mW-500mW-550mW Red 5.6mm Laser Diode Original Mitsubishi | eBay

5pcs Original Mitsubishi LPC836 650nm Red 5.6mm Laser Diode. 5x LPC836 5.6mm Laser Diode. warranty: no warranty because laser diode is consuming material.
www.ebay.com



Now a 639nm will be much more visible than a 650nm and you can also get more out of it with a glass lens rather than an acrylic.

 
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RedCowboy said:
You can buy good red diodes for cheap, plus they will be brand new and you can power them with a pair of AA batteries in series, the internal resistance of the laser diode will usually allow you to get away with it but it could shorten it's lifespan, or just buy a cheap driver.

Just remember safety 1st, any laser over 5mw can damage our eyes.

www.ebay.com

5pcs LPC836 650nm 350mW-500mW-550mW Red 5.6mm Laser Diode Original Mitsubishi | eBay

5pcs Original Mitsubishi LPC836 650nm Red 5.6mm Laser Diode. 5x LPC836 5.6mm Laser Diode. warranty: no warranty because laser diode is consuming material.
www.ebay.com



Now a 639nm will be much more visible than a 650nm and you can also get more out of it with a glass lens rather than an acrylic.

Click to expand...

Purchasing ready laser diodes, drivers and components is probably the right and easiest thing to do.
Sounds great, thank you for sharing these links for a red laser build :)

Of course laser safety always comes first!
 
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