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thats another test... how long will it run... cumulatively on a single charge...
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FrozenGate by Avery
A true Survival laser
- Thread starter LocksmithArmy
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LaZeRz
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Seems like an interesting idea, goodjob 
jakeGT
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I disagree. Though it's true that 532 appears brighter than 445, it is also true that 532 takes a lot more energy per mW of optical output to create. Remember, the DPSS process is not very efficient.
What you should really be using, is an array of 4 or 5 of the 515nm diodes from Soraa / Nichia / Osram. With 250mW of green requiring (probably) around 250mA of input power, your idea might actually flyI'm sure you could charge up enough juice to run that long enough to signal the plane. Heck, you could probably use one of those hand-crank generators to produce 250mA and 3 or 4V.
Lol, inexpensive route eh?
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Thats a great little build there!!:gj:
Take a few of the ones that the dog chewed up, put a laser in them, toss them in the yard, let them charge during the day, have a photocell on them so they turn on at night,....instant laser fence to keep out the dog!
(of course I would not advise doing anything like this.....besides the dog would just chew them up during the day
)
Ra1nfade
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Its too bad 405 are voltage hungry diodes, they would be nice for starting fires in a pinch 
Very neat build! Eco-friendly maybe :thinking:
Very neat build! Eco-friendly maybe :thinking:
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jcranmer
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Apparently I am over thinking this as well, but if you end up in the ocean with a traditional laser (as we use them around here), I'm thinking the sea water shorting out your batteries may very well make them explode, thereby ruining your chances of using it for signaling even if you had a fully charged set of dry batteries.
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^^^Solution = waterproof case, plastic bag.... or just some well oiled o-rings.
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in my next generation of this laser... it will be waterproof ans incorperate a crank generator aswell as the solar... just incase you use your solar power and u see a rescue helicopter fly by, you can then crank it
and some update on the current version: i boughe a non rechargable 3.6v AA and stuck it in to test theory... but there was an issue... somehow... it was leaking juice, in the off position the laser was on dim (about what the 1.2v put out) in the on position it shot quite powerfully... sooo i had to figure this out... upon alot of testing there was a resistor that made this happen... somehow... so i replaced the resistor with a wire... and it turns on and off at full power...
still waiting on my rechargable 3.7v AA i ordered... but so far its working well, recharges the 1.2 and fires stronger beams at 3.6 (still not a 1w beam... but still cool)
and some update on the current version: i boughe a non rechargable 3.6v AA and stuck it in to test theory... but there was an issue... somehow... it was leaking juice, in the off position the laser was on dim (about what the 1.2v put out) in the on position it shot quite powerfully... sooo i had to figure this out... upon alot of testing there was a resistor that made this happen... somehow... so i replaced the resistor with a wire... and it turns on and off at full power...
still waiting on my rechargable 3.7v AA i ordered... but so far its working well, recharges the 1.2 and fires stronger beams at 3.6 (still not a 1w beam... but still cool)
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another update...
i kept snappng crappy wires inside it since the driver is not locked into place like it was origionally... sooo i replaced every wire inside with some super wire i got from flaminpyro... all the extra wire (i added abt 2" to each wires origional length) makes the alser heavier aswell as helps hold everythign tight by filling in the extra space...
still awaiting the 3.7 battary... but so far so good...
i kept snappng crappy wires inside it since the driver is not locked into place like it was origionally... sooo i replaced every wire inside with some super wire i got from flaminpyro... all the extra wire (i added abt 2" to each wires origional length) makes the alser heavier aswell as helps hold everythign tight by filling in the extra space...
still awaiting the 3.7 battary... but so far so good...
Garoq
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Overall I like the idea...I respect people who think "outside the box", no matter (almost) where it leads.
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I ddnt actually make it incase i was stranded on an island... heck id enjoy hangin on an island by myself... i made it cause solar power gives me a stiffy...
i cant wait for my 3.7v AA
i cant wait for my 3.7v AA
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Possible idea. What about those LED flashlights that have a small hand crank operated generator built into them ? Might one incorporate a laser module into one of those ? It would have the added virtue of being able to charge/operate in darkness as well as day.
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You don't like reading through the whole thread do you?
benmwv
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Though it's a good idea, I see a few problems.
First thing isn't really a problem with your design, I just want to know where you managed to get a 3.6v AA non-rechargeable. Maybe post a pic? I'd like to see that.
Second problem I see is that you plan on just swapping the batteries out one for the other. Lithium ion is over 3x the voltage of nicd. How do you expect that to charge? That charge circuit it probably just a 1.5-2v solar panel with a diode, maybe a resistor. This just won't work with lithium ion, they need a special charge circuit and a supply of around 5v.
Third problem is that you are using no driver at all.
How I would do it:
I would change the included battery for another battery of the same type, but higher capacity. From what I've seen they use a nicd AA battery, but a cheap one with very low capacity. Go to the store and buy a good energizer high capacity rechargeable AA 1.2v.
Now it would be best to remove the led. You probably shouldn't try to connect your laser directly for the led because it might have a resistor in there somewhere for the led. Try and solder two wires somewhere that they directly connect to the battery, and solder your switch to one of them.
Now we need a driver. The driver must be able to boost from a 1.2v battery, I know there are some like that on dx. Just search something like 3watt single AA led driver.
Once you have your driver connect it and then connect your laser diode and your good.
First thing isn't really a problem with your design, I just want to know where you managed to get a 3.6v AA non-rechargeable. Maybe post a pic? I'd like to see that.
Second problem I see is that you plan on just swapping the batteries out one for the other. Lithium ion is over 3x the voltage of nicd. How do you expect that to charge? That charge circuit it probably just a 1.5-2v solar panel with a diode, maybe a resistor. This just won't work with lithium ion, they need a special charge circuit and a supply of around 5v.
Third problem is that you are using no driver at all.
How I would do it:
I would change the included battery for another battery of the same type, but higher capacity. From what I've seen they use a nicd AA battery, but a cheap one with very low capacity. Go to the store and buy a good energizer high capacity rechargeable AA 1.2v.
Now it would be best to remove the led. You probably shouldn't try to connect your laser directly for the led because it might have a resistor in there somewhere for the led. Try and solder two wires somewhere that they directly connect to the battery, and solder your switch to one of them.
Now we need a driver. The driver must be able to boost from a 1.2v battery, I know there are some like that on dx. Just search something like 3watt single AA led driver.
Once you have your driver connect it and then connect your laser diode and your good.
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My deepest apologies for missing the post that referred to the hand crank. Then again, I am not known for being too swift in the way of smarts or reading comprehension. I'm generally a brute force hands on sort of guy. I usually leave the thinking and brain-work to those with the smarts. To be honest, most of this high tech laser and electronic stuff is way over my head. But I'm willing to try to learn, however slow a process that may be.
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