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Input of X volts to have output power = 30mW?
http://45.55.195.193/viewtopic.php?f=7&t=19987		 Page 1 of 2
Author:  whitty [ Tue Oct 19, 2010 9:56 pm ]
Post subject:  Input of X volts to have output power = 30mW?
How many mW is 3 volts? Additionally, how many volts is 30mW? Also, what is the volt/mW ratio?

You see, I have a class III laser with a max output of <30mW (wavelength = 532nm +-10). It's running on two 1.5V AAA batteries, and I'm sure I can kick the power up quite a bit. I just don't know the conversion factor.

Already Googled, didn't see anything.
Author:  Petethegoat [ Tue Oct 19, 2010 10:03 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
Alternate title: HEY GUYS HOW DO I LIGHT JOINT WITH LASER?
Clearly a noble endeavour, and don't say you haven't thought it.

I don't actually have anything constructive to add, so uh yeah.
Author:  whitty [ Tue Oct 19, 2010 10:05 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
Not me desired intention, as I do not have any papers... Or any weed atm.... lol but not a bad idea.

No, in fact, I just want to see how high I can make this go up to and see what all I can burn/pop.
Author:  Duh102 [ Tue Oct 19, 2010 10:08 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
A watt (the W there) is not a unit directly convertable to volts unless you also know your amperage.
Watts = Volts X Amps
But, if you know the max voltage rating for your diode, then you can try increasing the amperage after getting that many volts.
Author:  Lizardheim [ Tue Oct 19, 2010 10:08 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
I don't know much about this, but from what I remember it's some bull♥♥♥♥ about if you have amps aswell, you can calculate out the voltage from watts.

Or something like that. I'm not supposed to know this for a year.

DAMNIT DUH
Author:  Joe [ Tue Oct 19, 2010 10:17 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
Code:
function voltage()
   V = voltage
   W = wattage
   A = amperage
//formula
   V = W/A

   if V = W/A then
      V*A = W
      V/W = A
   end
end
Author:  Roast Veg [ Tue Oct 19, 2010 10:18 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
Duh102 wrote:
amperage


If you mean amplitude, then you are completely correct. I have no idea what kind of amplitude that thing would run at normally, though.
Author:  Lizardheim [ Tue Oct 19, 2010 10:19 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
I'm pretty sure it's called watts, not wattage
Author:  Joe [ Tue Oct 19, 2010 10:23 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
@Roast Veg: No, it's amperage all right

@Lizard: the quantity of watts is known as wattage
Author:  Petethegoat [ Tue Oct 19, 2010 10:23 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
Definitely amperage, and definitely wattage.
Edit:
What Joe said, the blasted ninja.
Author:  Roast Veg [ Tue Oct 19, 2010 10:27 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
Hmm... I think it must be one of our British-isms. [Hahaha here we make fun of Americisms]

Anyway, I see Watts as a foolish term anyway. I say whack up that voltage and see what happens.
Author:  whitty [ Tue Oct 19, 2010 10:32 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
I'll try to find a link of my exact laser. Hold on.

*EDIT*
This, pretty much:
http://www.dealextreme.com/details.dx/sku.12337

Also, no idea the # of amps.
Author:  Duh102 [ Tue Oct 19, 2010 10:37 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
Roast Veg wrote:
British-isms.
...
Anyway, I see Watts as a foolish term anyway.

Each quantity has their use. Amplitude is an entirely different quantity that applies to waveforms.
Author:  whitty [ Tue Oct 19, 2010 10:38 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
Well if you said:
Watts = Volts X Amps
And my max output is <30mw, and my volts i know is 3, can I find my amps? Also, I REALLY doubt I can change the amps. All I can do is change the volts. The laser is encased in metal.
Author:  Joe [ Tue Oct 19, 2010 11:25 pm ]
Post subject:  Re: Input of X volts to have output power = 30mW?
And if you had a high voltage but a low amperage, you would have a very weak laser beam that lasted a long time.
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