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ArcticMyst Security by Avery

plp520 dim dot

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Jun 26, 2015
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Im attempting to build my first green laser. I am using a plp520 diode with an acrylic lens and a 445ma driver, and the battery is a 3.7v nitecore. The battery is charged but all I get is a very dim green dot. Does anybody know what may be wrong?
 





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May 14, 2013
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Im attempting to build my first green laser. I am using a plp520 diode with an acrylic lens and a 445ma driver, and the battery is a 3.7v nitecore. The battery is charged but all I get is a very dim green dot. Does anybody know what may be wrong?

I hope you mean the PLP520-B1 and not the PL520, 445mA will kill a PL520 but is ok for the PLP520-B1.

Alan
 
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can you give us more info on your build? At first that sounds like you blew the diode but without proper info its hard to tell
 
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I bought the diode already in the housing with the acrylic lens. I soldered the leads to the leads of the driver. I put the driver in the pill and soldered the ring and outer negative part of the driver
 
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Specifically what driver are you using, that could also be the problem, can you post a link to the driver where you bought it, or post photos of it.

Alan
 
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Yes. I am using that driver with one 3.7v 18650

Ok there is the problem, that is not a boost driver, you have to use 2 batteries. Either buy the extension tube: Battery Extension Tube- Black Anodized Aluminum or use a pair of 16340 batteries, try to get good quality batteries because the driver will drop out of regulation well before the batteries are fully discharged, that diode requires about 6.3-6.8V to operate. That driver can work with one battery with some diodes but not with the PLP520-B1.

Alan
 
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I just tried two 3.7v batteries and its much better. Thank you for your help. Im going to get new batteries and a better lens then il post pictures of it.
 




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