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FrozenGate by Avery

wanna run my laser on higher voltage.

A

aussiebuddha

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Sep 4, 2007
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Hi Guys, I just bought one of the cheaper greenies from DX, but i dont really feel like using alkies or nimhs since they have lower voltage.
I was wondering.
There are AAA lithiums that have 3.6v instead of 1.5V

Would my laser be able to cope with 1 3.6v battery, instead of 2x1.5v(3.0v) or would it fry it?
 





it should be alright, but the DX lasers are made to fit 2 AAA's, how are you going to use just one?
 
Well i have 2 options in mind one easy and one more difficult
the easy one would be to put a dummy aaa cell to fill the space.

The more difficult would be to either mod my pointer and cut the tube shorter (which i dont think i'll do) or make another shorter tube out of aluminum.
 
You probably will.. as discussed elsewhere on this forum, the DX driver circuit is badly designed and will give more current to the diode with rising supply voltage.

I have a DX20 here that runs way better on a stable 2.8 or 3 volt source than it does on alkalines or NiMH's... otherwise the battery voltage drops below 2.5 or so after some use, and it gets dimmer.
 
niiiice :-)
but there's no way to pot mod these right? or put a lens or something to make it stronger?
Mine is a new (not newwish) 50mw $26 greenie from dx
 
People run the lithium AAA's at 1.7v each in there for a total of 3.4v to the circuit without any ill effects, so you MAY be able to get away with doing the 3.6 - only one way to find out ! :-) I would suggest the dummy cell method personally.
You can always shine it through a lense after the fact, but as far as adding one to the laser to make it stronger, I dunno about that !
 
Im putting a binocular lens that works like an collimator lens infront of my dx 30. With that I can even burn matches ;)
 
Well, a single 3.7V battery has very short life. If you don't mind shortening the diode life a little bit, it will probably work - but you're not gunna get any real advantage. The battery life will be next to nothing on a single 3.7V AAA sized li-ion.
 
pseudonomen137 said:
Well, a single 3.7V battery has very short life. If you don't mind shortening the diode life a little bit, it will probably work - but you're not gunna get any real advantage. The battery life will be next to nothing on a single 3.7V AAA sized li-ion.
Click to expand...

Good observation, ps137.  

Aussiebudda, the current draw on a single Li-ion will be at around the 1C rate, so expect a continuous run-time in the ball-park of 30-45 minutes.
 
thanks chimo
I understand about the runtime, and i'm happy with that, what i did not get is.
will i see any benefit? as in increased output?

Thanks
 
It will be brighter at the risk of reduced laser diode life. Depending on your particular board, using a Li-ion instead of NiMH may result in about 33% more current going to the LD.

aussiebuddha said:
thanks chimo
I understand about the runtime, and i'm happy with that, what i did not get is.
will i see any benefit? as in increased output?

Thanks
Click to expand...
 
maybe i should open and have a look at the board.
do you know any non destructive way to open a laser pointer?
 
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