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Description: A very powerful 5mW green laser. Fun, but don’t point in anyone’s eyes. These units include a momentary power button and two solder points for permanent on. The trim-pot adjusts the output power. We were able to push the current up to about 400mA where things started getting toasty, and very bright.
Dimensions: 56 x 11.5mm
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This module puts out a powerful beam, providing roughly 5x more light in my application than a 7-candela LED! And I’ve only used it with a 3 V power supply (so far).
Note that it has a momentary-contact push button for a reason. If you operate it continuously for an extended period of time, the output dies off. I wasn’t watching the clock, but I would guess that I ran it at least 10 mins. Fortunately, once it cooled off, it recovered back to its original self.
My test environment was sealed, and heat build-up was promoted by that. If you are going to run this module more than 2 minutes at a time (with at least another 2 minutes in between), then you need to pay attention to cooling. Having good air flow may be enough for extended use, I haven’t experimented with that.
If you are going to run it at more than 3 V (other reviewers have run it at up to 4.5 V), then I would recommend either short duration with cooling periods or perhaps heat sinks and a fan.
All-in-all a very nice little part! Enjoy :-)