SXmini mod ... Yihi
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I did not even completely realize how much thought went into this. it is amazing. the battery tube is much nicer than a spring which is copper for best conductivity. most mechs have one little hole at the bottom. if battery vents it does so at the top. it then swells and blocks the hole. here, there is room in the copper which can also expand. then there are four ample holes in the cap. they go further that the negative post is raised. so the battery does not block the holes. they had our safety in mind as well. which is important with 100w potential of this chip. even 60w pushes the battery. it is not a question of if it will fail but when. they have us covered. this was obviously built by engineers not someone that just turns a tube with only metal working knowledge. I mean look at the casting. it is flawless. yeah I am a fanboy but come on this is just superior.
A joule is the amount of energy (or work being done) by one watt for one second. In the context of electrical energy, it is defined as:
Joule = Watts * Seconds
I don't think this formula in itself can be used to accurately detect the temperature of the coil. All a Joule does is define the amount of energy being transferred in a given amount of time given the watts. How much work or energy transfer is happening isn't enough to accurately gauge the temperature. You would need to use a thermistor which is what the DNA-40 does. If it were as simple as specifying Joules, Evolv would have most certainly went that route since it is a very simple equation that can be done easily in the firmware and they wouldn't have needed to use nickel wire (they use nickel because its resistance changes depending on power applied is very predictable unlike Kanthal).
One thing you could do with Joules (though not sure why you would) is get an idea of how much of a vape you are getting at different wattages over different times. At 30 watts for a 3 second draw, you would be using 90 Joules. To get the same energy at 100 watts, you would need to take a puff slightly less than 1 second in length. This is something most people intuitively know anyway, but this I guess can quantify it.
The bolded section is complete and utter balderdash. You clearly have no idea what you're talking about. Please don't speak authoritatively on engineering topics when you have zero clue what the DNA-40 even does or how it is doing it.
Even with a better understanding of it (thanks BigEgo!) I'm still not really feeling the joules display as a practical feature. I've likened it to a really fancy puff counter. Perhaps if YiHi added a scientific calculator to their next board I would find at least some use for it. 
As far as design, there isn't really much room for radical variation from one APV to the next. Usually there are major issues that set the bad mods apart from the good ones, but it's always going to be the little things that allow the great mods to transcend the good. The recessed bottom cap of the Mini is a prime example of the kind of simple innovation that impresses me: By spring loading the terminal end of the 510 contact instead of just fitting the spring into the bottom cap, YiHi was able to maintain the diminutive profile of the device while retaining the ability for the mod to self-adjust for slight variations in battery length. If there is another mod out there that utilizes a spring loaded positive terminal, I am unaware of it.
I'm already seeing folks calling this device a ZNA clone, and I flinch every time I see it. While it's certainly inspired by the ZNA aesthetically, it takes just as much inspiration from other box-style APV's that have been successful in the market and adds a couple of little features of its own. And in the end, aside from mods getting smaller and more powerful, that's really the best we can hope for from new APV's, isn't it?
As far as design, there isn't really much room for radical variation from one APV to the next. Usually there are major issues that set the bad mods apart from the good ones, but it's always going to be the little things that allow the great mods to transcend the good. The recessed bottom cap of the Mini is a prime example of the kind of simple innovation that impresses me: By spring loading the terminal end of the 510 contact instead of just fitting the spring into the bottom cap, YiHi was able to maintain the diminutive profile of the device while retaining the ability for the mod to self-adjust for slight variations in battery length. If there is another mod out there that utilizes a spring loaded positive terminal, I am unaware of it.
I'm already seeing folks calling this device a ZNA clone, and I flinch every time I see it. While it's certainly inspired by the ZNA aesthetically, it takes just as much inspiration from other box-style APV's that have been successful in the market and adds a couple of little features of its own. And in the end, aside from mods getting smaller and more powerful, that's really the best we can hope for from new APV's, isn't it?
Only a couple of hours chain vaping. This is why i swap batteries.
bigego that's not very nice. I did not say that from an engineering standpoint but as a end user. which many others agree. you are in the sx mini thread to state that the dna40 is more advanced. that's going to go real far. I, as many others feel the dna40 fell short for various reasons. in theory it is great. it does not always work if it works at all. for many people. plus way more doa dna40 then sx mini. again, I state this as an end user. regardless of if I know how to use or not. I and the scores of others that had failures and mixed results should not have to be engineers to operate it. in fact I don't think evolv expected us to be. whatever. I prefer the sx mini. I also have a variant that I think really sucks. scores of other high $ mods. I prefer the sx mini. that is my personal opinion,solely.you can buy either for around the same price so it is up to each person. if you take the whole package,hana for instance(which I have) I feel the sx mini is far nicer. I thought the hana dna30 was great. than came the dna40, then the sx mini....I may be wrong to you about what you bolded but that was my result with it. many others as well. there is no reason to essentially call me an idiot because you prefer the dna40. even if I am wrong it is not very gentlemanly.
Got my replacement from the vendor slapped one of Jwrap's two-tone carbon fiber wraps on it.
slapped one of Jwrap's two-tone carbon fiber wraps on it. 
Thanks to retrox for your excellent youtube review.
I really like the look and build quality of this mod and over here in the UK its the same price as a VS rDNA. I repair and build mods when I have the time and having repaired a few VSs I could not justify spending the money on a rDNA 40 given what I have experienced with them.
I have opted to get a Celsius DNA 40 and retro fit a modifed cana box (FDV 4 510, 3d printed DNA cradle, mitac SS .3mm switch and leica glass etc) for testing purposes as I have no clue with NI200.
I really like the look and build quality of this mod and over here in the UK its the same price as a VS rDNA. I repair and build mods when I have the time and having repaired a few VSs I could not justify spending the money on a rDNA 40 given what I have experienced with them.
I have opted to get a Celsius DNA 40 and retro fit a modifed cana box (FDV 4 510, 3d printed DNA cradle, mitac SS .3mm switch and leica glass etc) for testing purposes as I have no clue with NI200.
I know that this is an sxmini thread but the dna 40 isn't total crap as it's made out to be by this "many people." Most of the failures are by the user side of the device. Mine has worked flawlessly after i fixed the 510 on the r91. With that being said, i still love my sxmini also. Different device for different moods. One thing I've noticed about vaping is that everyone has a different preference. One thing i can assure you is that the rdna 40 is not junk. The sxmini is not junk either. The sxmini is a work of art.
I did not mean to say it was junk or crap. I was just really defending myself against bigego. it is alright. I just prefer the sx mini. I was all over hana and swore I would never buy Chinese and they were evil. that is childish and racist. I came to my senses and realized that. glad I did. for the entire unit I feel it is a nicer offering than anything with a dna40 currently. not to say the dna40 is not a good device in it's own right. I did prefer the dna30 though. until they all broke. seriously though I am not being a wise-a they are okay.
FT now has enclosures listed which should fit the SX350:
$22.05 DIY Enclosure Case for SX300 G-Sensor VW APV Box Mod - aluminum alloy / silver at FastTech - Worldwide Free Shipping
I was messing around with my Omnitester, comparing the SX350 Mini to the SX350.. The SX350 Mini is more accurate than the SX350..
One can almost hear the crickets chirping in here. One issue so far that YiHi addressed quickly.. I've been keeping up with some international forums, and haven't read of any other electronic or QC issues either. VERY refreshing compared to the laundry-lists of issues in other popular devices, both low, and high-end.
VERY refreshing compared to the laundry-lists of issues in other popular devices, both low, and high-end.
One can almost hear the crickets chirping in here. One issue so far that YiHi addressed quickly.. I've been keeping up with some international forums, and haven't read of any other electronic or QC issues either.
That's because this thing just works. 1 year warranty, you can't go wrong.
I continue to be impressed.. I just now received an e-mail from YiHi, asking if anyone from ECF has had any further issues.
They stated that they want feedback from the market to continuously improve their products.. I have yet to receive any such e-mails from ProVape, or Evolv, and I have also contacted them regarding things in the past..
if they can upgrade the chip for the following
1- allow for the memory bank to keep unique power modes
2- get rid of the joules on the screen
Other than that - this device has been given me no issues and really works well
1- allow for the memory bank to keep unique power modes
2- get rid of the joules on the screen
Other than that - this device has been given me no issues and really works well
I'll wait awhile to see if there are more suggestions, then send a reply.. I know there is a firmware update coming soon.. I'm not certain what will be included though..
Varitube just posted a photo of the battery extension tube that allows stacking two 18650s for 120 watts.
I'd like an SXmini but I'm sold on temperature protection after using it with my rDNA40. Hoping YiHi will offer an SXmini or similarly small device with that feature soon.
I'd like an SXmini but I'm sold on temperature protection after using it with my rDNA40. Hoping YiHi will offer an SXmini or similarly small device with that feature soon.
Technonut It would be cool if you had the option to turn off/on the gravity sensor and use the front buttons to go up and down / yes/no.
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