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Should i buy this?

Spyro

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Should i buy this lazer from lazerer- LZTN - 532nm 50mW Smallest Green Laser Pointer or this laser from o-like- Power Rock Green laser Torch 50mW /Focusable&Waterproof [OL-MRGL50] - $34.99 : Zen Cart!, The Art of E-commerce

I want to know if they are good, and if they are really 50mW. And another thing, i built a diode test driver that runs on 250 mA. My red laser diode safe current is 300mA but when i connect it to the driver it doesnt give any power. Here are some pics:
P.S my friend once connected his diode to a 3v power supply and the laser vas verry bright, but for a few seconds, now it glows like normal

By tautis44 at 2012-01-15

By tautis44 at 2012-01-15

By tautis44 at 2012-01-15

By tautis44 at 2012-01-15

By tautis44 at 2012-01-15
 

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you know, a lot of people lately (including the pros on the forum) have been purchasing or already purchased o-like...in fact, a young man just the other day went with a 50 mW waterproof laser and came back to tell us that he loved it!
 

Eudaimonium

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Sigurthr

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I can't tell for sure, but it looks like that LM317 is connected very incorrectly.

There are a ton of threads on the LM317 here, a simple search will yield you the correct schematic.
 

Spyro

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I can't tell for sure, but it looks like that LM317 is connected very incorrectly.

There are a ton of threads on the LM317 here, a simple search will yield you the correct schematic.
It is connected good...i didint have a 4ohm rezistor or 2 2ohm rezistors so i used 2 2,5ohm rezistors.
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Last edited:

InfinitusEquitas

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I would go with the o-like.... I doubt either would be underspec since you're looking for only 50mW.

The mini from lazerer is also great (I have two myself), but is a much much cheaper host.
 




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