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determine voltage at a certain wattage

Discussion in 'VV/VW APV Discussion' started by Azphat12, Dec 12, 2012.

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  1. Azphat12

    Azphat12 Senior Member Verified Member ECF Veteran

    Is there a formula or calculator to determine what voltage your device is using if you have a set ohm and set wattage?

    Also, I have a Vamo. So I know I can do 1x 18350, 2x 18350, and 1x 18650
    Being new to this....are there restrictions to wattage/ohms etc etc that I can use per setup?

    I currently am using a 1.9 ohm Aga-t and have it set at 9watts. Using 1x AW IMR 18650
    Just wondering where the limits are at with this device. When might I need to use 2x 18350?

    Any links/responses would be great.
     
  2. Hoosier

    Hoosier Vaping Master ECF Veteran

    Jan 26, 2010
    Indiana
    The same formulas that are always used. V=IR & P=VI. The magic of algerbra means V=square root of (PR) so you're vaping at about 4.1 Volts at about 2.2 Amps.

    I don't know what the limits of a Vamo are.
     
  3. Azphat12

    Azphat12 Senior Member Verified Member ECF Veteran

    To be honest....my Algebra is a bit weak, lol
     
  4. 68injunhed

    68injunhed Senior Member Verified Member ECF Veteran

    Jul 19, 2012
    SE Kansas
    Google ohmslawcalculator.
     
  5. Hoosier

    Hoosier Vaping Master ECF Veteran

    Jan 26, 2010
    Indiana
    I suspected as much, so didn't show how it was done and just gave the resultant formula. That and I like magic. Always wanted to be a magician, but never had the finger control to do the tricks I enjoyed. But I'm fairly good at math and it seems like magic to some folks.
     
  6. Azphat12

    Azphat12 Senior Member Verified Member ECF Veteran

    I took your formula and did a google search. Ohms Law Calculator came up. That is now in my favorites, lol
     
  7. Azphat12

    Azphat12 Senior Member Verified Member ECF Veteran

    Im ok with math....I just have not done Algebra in years. So formulas have been forgotten.

    I on the other hand try to do magic..lol. I can do some sleight of hand...but still working on the nervous shakes when I perform for friends/family. It is pretty hard to stay calm when your nervous in front of people, lol
     
  8. Hoosier

    Hoosier Vaping Master ECF Veteran

    Jan 26, 2010
    Indiana
    Can you do the ball moving the cloth square around?

    I watched Teller doing a ball and cup thing that just blew my mind while Penn was explaining how the ball and cup normally worked. Then I saw this guy doing a different take using the same technique and my mind was blown again. Impressive sleight of hand at the 2012 Beijing International - YouTube

    I can barely do the simple stuff...
     
  9. Azphat12

    Azphat12 Senior Member Verified Member ECF Veteran

    No, right now I simply try to learn card tricks. The problem is...if you do not keep doing them you forgot em.
    Maybe not forget the way to sleight...but you forget the routine sometimes. So you can kinda piece things together.

    Right now I like doing the Jumping Gemini
     
  10. TrueNews

    TrueNews Full Member

    Dec 1, 2012
    Perth, Australia
    Before you use the 18350 AW IMR's (stacked as a pair) I would do a quick resistance test, using the same atty, and compare the results from the 2 x 18350 configuration to that from the 18650.

    I have just done an atty resistance check (using the same atty) on my Vamo and it varied between these two configurations.

    1 x 18650 AW IMR gave a reading of 1.5 ohms
    2 x 18350 AW IMR's (stacked pair) gave a reading of 1.7 ohms

    0.2 ohms may not seem a huge difference, but if the Vamo has read a 1.5 ohm atty as 1.7 ohms incorrectly, then given a VW setting of 9 watts, it will set the voltage at 3.95 volts. - This setting on a 1.5 ohm atty, would actually be 10.4 watts.

    I would suggest using a higher resistance atty when you use the 2 x 18350 configuration.

    PS.
    If you want a reasonable write up, specs, and pictorial instructions for the Vamo, have a look on Health Cabins web site under APV.
     
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