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Boost technology in a regulated mod; who can explain how it works?

Discussion in 'General Vaping Discussion' started by Baditude, Mar 3, 2018.

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  1. Baditude

    Baditude ECF Guru ECF Veteran

    Apr 8, 2012
    Ridgeway, Ohio
    So how does my single 4.2 volt battery allow me to put out 7 volts to the atomizer with my Provari? :blink:
     
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  2. zoiDman

    zoiDman My -0^10 = Nothing at All* ECF Veteran

    Supporting member
    Apr 16, 2010
    So-Cal
    Black Magic?
     
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  3. untar

    untar Vaping Master

    Feb 7, 2018
    Germany
    Voltage is not power! Voltage times current is power. The voltage is boosted with a magic contraption but that consumes current. In addition, some current will get lost to heating up components.

    Let's say you're selecting your provari to fire 7 Volts on a 1.6Ω resistor. That would be 4.375 Amps and the power on the firing side would be 30.625 Watts (7*4.375).

    Now let's take a look on the battery side. The mod needs to draw (at least) 30.625 Watts from your single 4.2V battery. 30.625W/4.2V = 7.3A, your mod will draw 7.3A from your battery to be able to deliver what you dialed in for the firing side (that's almost twice the current delivered to your coil).

    In reality it will be more since some energy will get lost in the mod and your battery won't stay at 4.2V under load, both means even more power is needed than what I just calculated.

    Edit: corrected a typo, not 2.0Ω but 1.6Ω :oops: now it makes more sense ;)
     
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  4. zoiDman

    zoiDman My -0^10 = Nothing at All* ECF Veteran

    Supporting member
    Apr 16, 2010
    So-Cal
    (b) When the switch is opened, current will be reduced as the impedance is higher. The magnetic field previously created will be destroyed to maintain the current towards the load. Thus the polarity will be reversed (means left side of inductor will be negative now). As a result, two sources will be in series causing a higher voltage to charge the capacitor through the diode D.

    Boost converter - Wikipedia
     
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  5. Letitia

    Letitia Therion/Nano Junkie ECF Veteran

    Supporting member
    Apr 2, 2017
    West Frankfort, IL
    again:facepalm:
     
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  6. WillyZee

    WillyZee Vaping Master Verified Member ECF Veteran

    Sep 23, 2013
    Toronto
    it's like Nitros :blink:
     
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  7. stols001

    stols001 Mistress of the Dark Nicotinic Arts Verified Member ECF Veteran

    Supporting member
    May 30, 2017
    Tucson, AZ
    No, it's all perfectly clear:

    [​IMG]

    Have faith in the boost.... :)

    Anna
     
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  8. Letitia

    Letitia Therion/Nano Junkie ECF Veteran

    Supporting member
    Apr 2, 2017
    West Frankfort, IL
    Sticking with magic.
     
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  9. zoiDman

    zoiDman My -0^10 = Nothing at All* ECF Veteran

    Supporting member
    Apr 16, 2010
    So-Cal
    And that All Jives with the Conservation of Energy.

    If Power = Voltage * Current then if I Increase Voltage, Current must Decrease to maintain the Equality.

    Same with the resulting Heat. Since it is a Form of Energy, if Heat is created, that Energy had to come from Somewhere. So something had to Decrease so that everything is the System remains in Equilibrium.

    Else we would have "Free Energy". And that Only happens in the Movies.
     
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  10. Baditude

    Baditude ECF Guru ECF Veteran

    Apr 8, 2012
    Ridgeway, Ohio
    Thank you @untar . Your explanation has made the most sense to me so far. We lay people just have to accept that "magic contraption" is going to work its magic. ;)

    I think where many of us get confused (at least me) is that 4.2 volts on the battery wrapper. The really important specification is the amp rating. Mooch kind of alluded to this in one of his recent YT videos. When choosing batteries the primary spec should be the amp rating. The 3.7V or 4.2v merely states what kind of battery it is. The mAh rating provides a very rough estimate of how long the battery will function per charge, but there are so many variables that we can't rely upon that value.

    Voltage is potential energy by definition. Wattage is a calculation. Amperage is electrical current realized (work).

    The only problem is if we use an aftermarket battery with false amp ratings.
     
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  11. zoiDman

    zoiDman My -0^10 = Nothing at All* ECF Veteran

    Supporting member
    Apr 16, 2010
    So-Cal
    VV/VW Board Schematic...

    [​IMG]
     
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  12. untar

    untar Vaping Master

    Feb 7, 2018
    Germany
    Well, instead of "magic contraption" you could call it "deep dark secret of the universe", that's what I do when I don't understand something, it's more sciency-ish :D
    I think you're missing a dead possum in the middle of the pentagram. You're lucky, I think there's one in the shinyitis thread :evil:
     
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  13. Baditude

    Baditude ECF Guru ECF Veteran

    Apr 8, 2012
    Ridgeway, Ohio
    Speaking of magic contraptions, lighted candles, mystical spells, and Provari's. (You only need watch the first couple of minutes of the below video. The original music that was removed from the video was Gregorian chants. For full effect, you can play both videos simultaneously.)



     
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  14. zoiDman

    zoiDman My -0^10 = Nothing at All* ECF Veteran

    Supporting member
    Apr 16, 2010
    So-Cal
    I actually Omitted it on Purpose. Else these people might Descend on the ECF with Flaming Torches and Pitchforks.

    National Opossum Society
     
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  15. sonicbomb

    sonicbomb Vaping Master Verified Member ECF Veteran

    Feb 17, 2015
    1187 Hunterwasser
    OK if we really want to get deep - all the stuff that 'science' knows about electricity is in a black box. We know what goes in, some magic happens inside the box, and stuff comes out.
    We cannot really understand what electricity is doing because (as yet) quantum phenomena down at the subatomic level are intrinsically unknowable.
    Thank goodness for maths and the scientific method, or we would still be bashing rocks together and probably still be smoking (thanks for nothing Jean Nicot).
     
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  16. Coastal Cowboy

    Coastal Cowboy This aggression will not stand, man! Verified Member ECF Veteran

    Supporting member
    Jun 13, 2013
    Alabama Gulf Coast
    Dude... we are a bunch of tinkerers, hobbyists and ADHD excitables. If you ask us what day it is, we will commence to arguing over the best way to build a calendar.

    And for the love of all that is holy, don't take us fly fishing.
     
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  17. Asbestos4004

    Asbestos4004 Vaping Master Verified Member ECF Veteran

    Sep 11, 2013
    Sugar Hill, Georgia
    You took the words right out of my mouth.
     
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  18. Rossum

    Rossum Surly Curmudgeon Verified Member ECF Veteran

    Supporting member
    Dec 14, 2013
    SE PA
    [​IMG]

    Now seriously, that's a terrible idea. Under no-load conditions, you'll have 8.0V, but when you start pulling current from them, ugly things can happen. This is why series strings of batteries should always be balance-charged and ideally, the individual cell voltages should be monitored at all times.
     
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  19. Rossum

    Rossum Surly Curmudgeon Verified Member ECF Veteran

    Supporting member
    Dec 14, 2013
    SE PA
    Right. Power Out equals Power In minus losses in the converter

    But Power equals Volts times Amps.

    Losses in a modern DC-DC converter tend to be in the 5-10% range.
     
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  20. zoiDman

    zoiDman My -0^10 = Nothing at All* ECF Veteran

    Supporting member
    Apr 16, 2010
    So-Cal
    Not Advocating Doing it.

    But the Point of Illustration is that being in Series isn't a so much a Doubling of Voltage. It is a Summation of Voltage.

    Which Ties into Post Number 64.
     
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