Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

wanna run my laser on higher voltage.

Joined
Sep 4, 2007
Messages
10
Points
0
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?
 





Things

0
Joined
May 1, 2007
Messages
7,517
Points
0
it should be alright, but the DX lasers are made to fit 2 AAA's, how are you going to use just one?
 
Joined
Sep 4, 2007
Messages
10
Points
0
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.
 

Benm

0
Joined
Aug 16, 2007
Messages
7,896
Points
113
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.
 
Joined
Sep 4, 2007
Messages
10
Points
0
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
 
S

SenKat

Guest
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 !
 
Joined
Jul 25, 2007
Messages
118
Points
0
Im putting a binocular lens that works like an collimator lens infront of my dx 30. With that I can even burn matches ;)
 
Joined
Oct 24, 2006
Messages
2,032
Points
0
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.
 

chimo

0
Joined
Jun 20, 2007
Messages
650
Points
0
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.

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.
 
Joined
Sep 4, 2007
Messages
10
Points
0
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
 

chimo

0
Joined
Jun 20, 2007
Messages
650
Points
0
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
 
Joined
Sep 4, 2007
Messages
10
Points
0
maybe i should open and have a look at the board.
do you know any non destructive way to open a laser pointer?
 




Top