DNA40 thoughts and opinions

[jsx821]

It's entirely possible. I saw a post where someone supposedly talked to a tech at evolv who stated it was a firmware issue. Considering some of the very strange behaviors saw out of my unit it's very likely that's the case. It did more than just garble the screen. It would often times drop out of tp mode, change resistance up or down randomly, etc. Things neither of my two good boards now do.

So its possible to have the screen glitch fixed but still suffer from random resistance changes?
My DNA40 screen doesnt glitch anymore after getting it repaired. But still suffer from ohm drops (up and down).. thus making TP useless. My other friend has a DNA40 that works solid on his device. I put his atty on my mod and my hana struggles to keep a proper reading.

 

[SeaNap]

I saw a post where someone supposedly talked to a tech at evolv who stated it was a firmware issue.

That was me. When talking with them, he stated that the board needed to be reprogrammed, and I would have to take it out of my mod for them to properly do that. He also used the verbiage "we are replacing v1.1 and v1.2" Which implies they are putting in a v1.3 of firmware, right? I could be way off track in my assumptions, but I got the impression that it was firmware. The display is acting a lot like my old NES games before I would blow in the cartridge which doesn't necessarily mean the display itself is bad. But who knows, could be many things.

Edit: It could be a hardware issue that can be corrected by firmware, could be a firmware issue, a little of both. Doesn't really matter though what it is, their fix right now is to have you return the board and they give you a new one. I don't know if they are replacing the boards with new ones because of a hardware issue, or because they are processing a lot of boards and its logistically easier.

What I find interesting is that even when my screen glitches/locks the TP and vape still works great. I can't change wattage or temp but I can keep vaping with the glitched screen.

 

[Rossum]

But who knows, could be many things.

In fact, it could be more than one thing. In other words, there could be several different underlying causes for the various problems that have been reported.

 

[rusirius]

So its possible to have the screen glitch fixed but still suffer from random resistance changes?
My DNA40 screen doesnt glitch anymore after getting it repaired. But still suffer from ohm drops (up and down).. thus making TP useless. My other friend has a DNA40 that works solid on his device. I put his atty on my mod and my hana struggles to keep a proper reading.

I don't know, I know I've talked to some who saw strange changes in resistance (I.e. going outside would result in the resistance going up a few hundredths and therefore vape getting really hot and burnt which is the exact opposite of what should happen, getting the atty cold and having it reread the resistance should result in it getting a lower than normal resistance) anyway in some of those cases running it at 40W for a while did eventually produce a minor screen glitch. So in their case it just doesn't seem to be as bad.

But.... It's complicated because swings in resistance could obviously be the build. Loose connections, etc. But if you can take an atty that's solid on one dna40 and swaps around on another, barring any issues with the 510I think it's safe to say it probably has some degree of issues.

 

[RandyF]

I have noticed swings in resistance reading, usually when I swap my battery or remove my tank to fill, a .14 coil will read .22 when put back on, and for whatever reason it will not ask if it is the same coil and keep it's base reading. If I have used it prior to doing either of those I have to let the atty sit so the coil will normalize, which I think in a tank can take a bit of time, because everything around the coil need to normalize as well, namely the juice in the wick, which will be warm, keeping the coil warm longer. I have been using 2 tanks, so if I need to do a battery swap or refill, I will do it, then put the tank on that has been sitting and if it asks if it is a new coil I can say yes, because it is at room temp. This has solved my issue, for the most part.

 

[Ian444]

While we're speculating on the possible causes of the DNA 40's glitches etc, I wouldn't be surprised if the board layout or manufacturing tolerances have caused a track or tracks to be not substantial enough, causing unwanted voltage drop and messing with the power supply to the Atmel mcu, especially at higher power. Maybe just a contributing cause to the other possibilities previously mentioned.

However, I don't understand why Evolv didn't put some statements on their web page keeping people informed, it would have saved a lot of angst. I am also disappointed that Evolv does not put PCB version numbers on their PCB's, this is an industry standard practice, and allows owners or service technicians to properly identify a version of the board. The faulty boards in circulation now cannot be identified, ever, not even in 2 years time when someone sells some on ebay. Also the data sheet lacks detail, expected behaviour of the display items, and revision status of the document.

It also appears that the Beta testers were using 25W boards with temp protection, rather than the DNA 40 boards. So the DNA 40 board appears to have not been field tested, or if it was, by few testers.

I bought 2 boards, I thought Evolv were thorough from watching the P Busardo videos of factory tours. I liked the people there. Testing for worst possible conditions was mentioned too, making their products bomb-proof. The boards are not cheap and I was expecting made in USA quality, I actually thought the boards were made in-house, but I don't have that impression now. My impression now is of a very young company and I hope they will have a good, long, hard look at how they do things.

 

[Moonbogg]

Guys sorry for not reading this entire, massive thread, but I just want to know if these things are working yet. Is it safe to buy one of these or am I taking a gamble of getting a screwed up device? Screen glitches and all that crap. Is it fixed?

 

[Ian444]

I have no idea. If you find out please post it. This info might be found in the vapor flask or one of the other DNA40 mod threads. If the replacement mods are all working, then I guess the chip has been sorted out.

 

[hyojah]

Just bought a Vapor Flask, if there are any glitches or problems whatsoever, I'm returning it and buying a Sigelei or something.

 

[classwife]

New Sub !!

Moved to Temperature Control from Variable Voltage APV Discussion