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DNA tc adjustments..

Discussion in 'Temperature Control' started by Fredman1, Oct 19, 2018.

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  1. diagrammatiks

    diagrammatiks Super Member

    Aug 18, 2018
    The mx already has an older chip. I’d honestly get the mirage for a solid tc mod. The mx will take a bit of tinkering and learning.
     
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  2. Rockford

    Rockford Super Member

    Nov 21, 2018
    BC Canada
    yeah, I've seen some reveiws, some good, a lot of bad ones tho... kinda funny most shops are still asking 149.99 for them, and DV's has them at half price now... that always makes me Leary tho....better stay away from it, I'm still really interested in the dna75C for the replay and Escribe.
     
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  3. Letitia

    Letitia Citrus Junkie ECF Veteran

    Supporting member
    Apr 2, 2017
    West Frankfort, IL
    Yihi are overall good chips but you have to be okay with fiddling. Many poor reviews come from people who just know how to get the most from the chip imo. The DNAC takes fiddling out of the equation. You may have to update the dna to use replay, Mirage has been out for a while now, may be pre-replay production.
     
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  4. Rockford

    Rockford Super Member

    Nov 21, 2018
    BC Canada
    I'm a former computer tech so I love fiddling, thats why Escribe actually interests me so much as I can adjust settings and tweak them, but some of the reviews have also said the Yihi chip is one of the best on the market for TC which is what I want, so making me think between the two chips now.
     
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  5. Letitia

    Letitia Citrus Junkie ECF Veteran

    Supporting member
    Apr 2, 2017
    West Frankfort, IL
    Both would be an asset, flip a coin or choose the one that looks more comfortable to hold.
     
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  6. RayofLight62

    RayofLight62 Super Member ECF Veteran

    Problem with TC is, the true relationship between temperature and resistance of a sensing wire is a curve.
    You cannot input a curve on a mod with three buttons, so all the mods except DNA use a number called TCR. Geometrically, a single number is a flat line, not a curve.
    The impact of approximating a curve to a flat line, is the temperature shown on the mod is an approximation of the reality, which gets more and more incorrect as you depart from median temperature.
    Once you grab the above, you are either happy to vape with a mod with TCR, or you want precision and repeativity, so you turn to DNAs.
    It is a limit of technology, which uses alinear materials, and requires a computer if you want precision.
     
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  7. RayofLight62

    RayofLight62 Super Member ECF Veteran

    Having both DNA and Yihi, I would say you few things.

    First, Yihi uses TCR not a curve, so the temperature shown is an approximation, and the changes you make, are not linear.

    Yihi uses the Power setting in TC to pulse the coil with it, while DNA intend it as a limit to the power fed to the coil. This is a big and fundamental difference.

    The DNA approach is the one most correct, but some prefers the brutality of Yihi approach, as it seems more powerful.

    In my view, if you set the power too high with Yihi, it starts PWMing the coil, which in turn affects your wicking. This doesn't happen with DNAs.

    My preference goes with DNAs.
     
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  8. Eskie

    Eskie ECF Guru Verified Member ECF Veteran

    May 6, 2016
    NY
    Or you could complicate your life even further and check out the Dicodes mods. Also rate as top notch temp control although the funky menu system takes time to get used to.
     
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  9. Rockford

    Rockford Super Member

    Nov 21, 2018
    BC Canada
    yep, I've checked them out a few times already..... absolutely beautiful, but will need to add to the piggybank for those :)
     
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  10. Coastal Cowboy

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

    Jun 13, 2013
    Alabama Gulf Coast
    I love the DNA250C too, but I'm also a big fan of the JoyeTech model. The JT has an advantage of being able to use either TCR or a temperature curve. It also has the advantage of cost--you can get a powerful, reasonably accurate and highly customizable JT mod for the cost of just the DNA chip.

    The DNA samples the coil resistance much more frequently so while its model is curve only, it's better able to adjust power during the drag/draw/pull/puff. I like that a lot because it means a smoother vape. The DNA is also slower to reach the target temp (without "punch" turned on) so you never even get a hint of overheat.

    If I were to show side-by-side plots of the power vs temp relationships for a DNA250C and a JT200, the power and temp plot for the DNA would be much smoother than the JT. The JT plots are more ragged because by the time the chip samples coil resistance, it's already too hot/cold and the mod makes a larger adjustment in power.

    Mods that use TCR only are fine as long as you're in a range below 470F (245-ish C) and you have the ability to fine tune the coefficient and starting wattage. For a 6-8 second drag, a straightline curve via TCR is indistinguishable from a nonlinear curve model. This is especially true when using SS wire, and you also have juiceflow and airflow moderating temperature change in the chamber.

    The more complex the wire and build, the more you want a custom curve.

    I've been buried in studying temp control for the better part of 2018. I've used chips from Evolv, Joyetech, Voopoo, Vandy, Smoant, Think Vape, Geek Vape, Kanger, Smok and Wotofo. I don't have a YiHi, Dicodes or AsMODus device (yet).

    My favorite is the DNA250C, with Joyetech a close second and Smoant a close third.
     
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