Old 01-28-2015, 03:58 AM #1
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Default Hand Crank Laser Concept

Hey guys, I'm thinking about building a laser using a handcranked flashlight as the "host". What do you guys think of this idea? Has anyone tried this? Would there be enough crank power to power say, a <200mw laser? I'm very new to building lasers, so please be as noob-friendly as possible lol.

Check this video out
https://www.youtube.com/watch?v=TTwxM-sjVPY


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Old 01-28-2015, 05:34 AM #2
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Default Re: Hand Crank Laser Concept

Why don't you post links to some of the crank flashlight hosts you're considering. That would be helpful in answering your question.
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Old 01-28-2015, 10:50 AM #3
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Default Re: Hand Crank Laser Concept

hey great concept. I like that you already have a video showing how it could work. What battery do you plan on using?
If I may make a suggestion and you might be planning to already but I would color code your wires or at least label them.
I can't wait to see progress + rep.
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Old 01-28-2015, 01:32 PM #4
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Default Re: Hand Crank Laser Concept

Quote:
Originally Posted by rhd View Post
Why don't you post links to some of the crank flashlight hosts you're considering. That would be helpful in answering your question.
i'm thinking about using this one as a host
Ideaworks Forever LED Flashlight Hand Crank Rechargeable Emergency Light | eBay

maybe this one
New Wind Up LED Flashlight 3 LED Bulbs Hand Crank Torch Green Power No Batteries | eBay
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Old 01-28-2015, 01:56 PM #5
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Default Re: Hand Crank Laser Concept

I had trouble finding clear information about how much power those generate, but a couple sources suggested around a watt. If that's the case, then you should be able to get 200mW out of a diode with correct driving.
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Old 01-29-2015, 12:44 AM #6
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Default Re: Hand Crank Laser Concept

Quote:
Originally Posted by rhd View Post
I had trouble finding clear information about how much power those generate, but a couple sources suggested around a watt. If that's the case, then you should be able to get 200mW out of a diode with correct driving.
awsome, thanks for helping me out!
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Old 01-29-2015, 02:44 AM #7
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Default Re: Hand Crank Laser Concept

Wouldn't it be possible to just have the crank charge a battery and then just power the LD from the charged battery. Or maybe that goes against the spirit of what you're trying to build?
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