DNA40 vs SX350j

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Vlad1

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Add on that any temperature control/protection using nickel coils means that the first pulse into the coil could be huge because of its low cold resistance. I don't know if the dna 40 starts off with low current level pulses (i.e., low voltage) and then ramps up as it gets an idea of the what the coils resistance is but, if not, even the shortest pulse at those higher current levels will generate more electrical interference. I'm guessing though that slowly ramping up the coil current, and therefore the temperature, would be frowned upon by vapers though. Seems like the DNA 40 would just hit the coil with a big first pulse (perhaps even just microseconds long) and then ramp the voltage level of each pulse after that. Or perhpas voltage and pulse duration.

A worst-case scenario would be that the DNA 40 doesn't adjust the voltage level at all, just the duty cycle and/or pulse width. That is, it only changes the number of times per second that the pulses are fired, or the pulse's width, in a temperature protection/control mode. Each pulse would still be at max voltage, generating max current, and would therefore create a lot more interference than when in other modes.

Need to find some find someone who has put a scope on the DNA40 when it's controlling temperature.

If it is electrical interference that's causing the problems then moving wires and adding filters (ferrites) to the wires to the DNA40 can, maybe, help. Lots and lots of variables here though. Better to redesign the board and mod the firmware.

I wouldn't want to speculate as to what is causing the problem on the DNA screens. But here's a link to some scope captures of the DNA 40 Taste Your Juice | THE EVOLV DNA-40 as well as some images of the board itself.
 
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Mooch

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    I wouldn't want to speculate as to what is causing the problem on the DNA screens. But here's a link to some scope captures of the DNA 40 Taste Your Juice | THE EVOLV DNA-40 as well as some images of the board itself.

    Thank you! I found a couple of others but not those. Wish someone had taken a good picture of the back of the board though. It's what the display is often up against (if folded over). Think I was able to work out the major components from the dimensions graphics in Evolv's manual though.

    Yea, my speculating certainly doesn't add anything to what everyone has to deal with. And I'm sure Evolv will fix the problem. This kind of troubleshooting is such a big part of what I do for a living...hard to not just dive in. I'll fire up a new thread if I just gotta' say more. :) Thanks again!
     

    retird

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    Thank you! I found a couple of others but not those. Wish someone had taken a good picture of the back of the board though. It's what the display is often up against (if folded over). Think I was able to work out the major components from the dimensions graphics in Evolv's manual though.

    Yea, my speculating certainly doesn't add anything to what everyone has to deal with. And I'm sure Evolv will fix the problem. This kind of troubleshooting is such a big part of what I do for a living...hard to not just dive in. I'll fire up a new thread if I just gotta' say more. :) Thanks again!
    Here ya go.....the gold solder point board is a newer version as opposed to the silver...

    10947185_10155253850070370_3687110810390507039_n.jpg
    10355817_10155253850390370_8288190253584715863_n.jpg
     

    retird

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    Yes they all use Evolv DNA 40 boards. Evolv doesn't actually produce a device they only manufacture the PCB and sell those to modders who in turn install them into their enclosures.

    I guess your definition of modder is different than mine... I don't consider Vapor Shark (2 versions), Innokin, Hcigar, Hana Modz (10 versions of the DNA40), BAP, Protovapor, Vapor Flask, Opus, and etc. just modders.... and some of these sell thru distributors also worldwide.. and some have China companies produce the devices for them too.... all use the DNA40's (small and/or large screen versions).

    For comparison purposes please list the companies who have devices with the J board in them...you need not list any more than eight for comparison as I stopped there....
     

    retird

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    That's fantastic, thanks!
    You are quite welcome... hope that helps ya out... I'm interested in your supposition... kinda makes sense to me as both the DNA and the J board are doing it...

    Wondering if mod design is playing a large role in this.... also wondering if shielding may help?
     
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    retird

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    mooch.... was reading a few of your previous posts.... FYI the DNA40 has a preheat function (in Temp Protection mode) where it throws max amperage when fired for up to a second to heat the coil faster. How long the preheat lasts is somewhat dependant on the temperature setting (the lower the temperature the quicker the temp is reached thus the shorter the duration of preheat) (I'm told up to 23 amps)...at least that is my lay understanding in layman's terms...
     

    Vlad1

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    I guess your definition of modder is different than mine... I don't consider Vapor Shark (2 versions), Innokin, Hcigar, Hana Modz (10 versions of the DNA40), BAP, Protovapor, Vapor Flask, Opus, and etc. just modders.... and some of these sell thru distributors also worldwide.. and some have China companies produce the devices for them too.... all use the DNA40's (small and/or large screen versions).

    For comparison purposes please list the companies who have devices with the J board in them...you need not list any more than eight for comparison as I stopped there....

    Yes it's true a number of vendors, retailers, modders, manufacturers, have utilized the DNA boards, however they are not manufacturing the DNA 40 but simply installing the board into their enclosure. Call them what you like but Evolv is the manufacturer of the DNA 40 board not any of those which you state.

    For comparison purposes please list the companies who have devices with the J board in them...you need not list any more than eight for comparison as I stopped there
    And that's just one of the reasons as I've stated previously there's really no comparison in these products other than temp limiting. Evolv is targeting "Modders, Boxers, Enclosure assemblers, Case Manufacturers, distributors" or whatever you want to call them, Yihi is targeting the masses with a rich full featured completed product to fit any need. That's not their only channel they will sell boards to Modders but that's secondary channel. Evolv sells chips to whoever they can.
     

    Vlad1

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    kinda makes sense to me as both the DNA and the J board are doing it

    I think you're conclusion is beyond exaggeration. I've see one post that has what appears to be a faulty display on one segment nothing even similar to the scramble screen the DNA 40 devices exhibit even in the current firmware release.
     

    Mike 586

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    xtwosm0kesx

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    Yihi is targeting the masses with a rich full featured completed product to fit any need. That's not their only channel they will sell boards to Modders but that's secondary channel. Evolv sells chips to whoever they can.

    No dog in this fight, but i'd be willing to bet Yihi still makes more off selling chips to other "Modders, Boxers, Enclosure assemblers, Case Manufacturers, distributors" than they are off of selling SX minis.

    Though given the initial reception of the SXmini M-class, that may change in the near future.
     
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    Spirometry

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    I think you're conclusion is beyond exaggeration. I've see one post that has what appears to be a faulty display on one segment nothing even similar to the scramble screen the DNA 40 devices exhibit even in the current firmware release.
    The screen scramble is only one variation of the display problem

    11wes03.jpg
     

    retird

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    I think you're conclusion is beyond exaggeration. I've see one post that has what appears to be a faulty display on one segment nothing even similar to the scramble screen the DNA 40 devices exhibit even in the current firmware release.

    To me a scrambled screen is a scrambled screen... both exhibit that in the pics here...
     

    Vlad1

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    To me a scrambled screen is a scrambled screen... both exhibit that in the pics here...

    Let me try to convey my point more clearly.

    We have 1 picture of a SXmini M with a failure dealing with the display, and the only report I've seen of such a failure in the last month and a half.
    We have hundreds or thousands of known DNA 40 failures dealing with the display even reported as recently as today with the most "Current Version" firmware.

    To compare this one failure to the many DNA 40 has had and conclusively state they "both the DNA and the J board are doing it" implying they have the same problem IMO is an intentional exaggeration. If there were even 2 or 3 reports of such a problem it would raise concern but only 1, I don't see the similarity.
     
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    dr g

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    I'll never understand the brand whores out there. Being loyal to a corporation that doesn't give a flying fart in space whether you exist or not has always seemed pretty moronic to me.

    Speak for your brand of choice, but Evolv time and again has demonstrated its commitment to its customers and the vaping community in general. Its entire corporate philosophy is different from most other companies, especially Chinese companies, which are only in it for the money.
     

    JimScotty0

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    Speak for your brand of choice, but Evolv time and again has demonstrated its commitment to its customers and the vaping community in general. Its entire corporate philosophy is different from most other companies, especially Chinese companies, which are only in it for the money.
    Let us not fool ourselves, they are all in it for the money. As they should be.
     

    dr g

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    Let us not fool ourselves, they are all in it for the money. As they should be.

    There's a difference between creating a lucrative product and being in it for the money. When you are a true innovator, you can well prioritize innovation and as a result end up with a strong revenue generator.

    But oddly enough with vaping more than many other industries today, the prevalence of small businesses and ground-up success stories, plus the very nature of the product, means a remarkable number of businesses are not in it for the money first and foremost.

    It's part of the unique self-regulating mechanics of this industry. This industry is about harm reduction, and that places a lot of value on things other than revenue generation.
     

    tchavei

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    Lol.

    I know a certain company starting with the letter 'E' that cut out a distributor after discovering that the distributor was selling a abnormal high amount of products to the same client. Interesting thing was that the manufacturer contacted the client to deal directly with him and not the other way around...

    Yes, it's all about money! ;)

    Regards
    Tony

    Sent from my keyboard through my phone or something like that.
     

    dr g

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    Lol.

    I know a certain company starting with the letter 'E' that cut out a distributor after discovering that the distributor was selling a abnormal high amount of products to the same client. Interesting thing was that the manufacturer contacted the client to deal directly with him and not the other way around...

    Yes, it's all about money! ;)

    Got any proof of said thing occurring, and the details of what happened?
    You're pretty obviously leaving out a lot of detail, if it even happened.
    You also might want to explain why cutting out a distributor indicates a company is in it for money. Doesn't that mean the exact opposite?
     
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