Official DNA 40 introduction

[Rossum]

Pure titanium has been known to oxidize very badly if it gets too hot -- see my blog. The GG gang has some 92% titanium that doesn't seem to do that, but the other 8% is some unknown proportion of Ni, Cr, Fe, and Al, so you get a bit of everything. However, in a temperature limiting mod, virgin grade 1 Ti would probably be a pretty safe choice -- just don't dry-burn it.

Having tried both titanium and Nichrome wires in conventional mods and then concluding that I much prefer Kanthal, I'm actually a bit skeptical about Ni200 or even Ti, but not enough to keep me from ordering up some Ni200.

 

[BrokenLung]

I tried to read all of the thread, and I did read most of it, so if this has already been answered and I missed it sorry...but...

1st: What gauge Ni200 are we supposed to use with this? What would something like 28, 30, 32, 34 gauge yield resistance wise on a 5/64th drill bit (macro coil) with around how many ever wraps you use? Better yet, does anyone have any resistance per inch type things so someone could put together some form of chart?

2nd: Does the accuracy of the temperature calculation vary with resistance of the coil? I would imagine it would have to considering this is obviously using an equation that has to include the resistance of the coil to calculate the voltage to apply to the wire? If it does vary, does it increase in accuracy when approaching 0.15 or does it increase if you were able to go above 1.0?

3rd: How does leg length affect things? Is it something that if you have longer legs (like a kayfun) you simply up the temperature a bit to compensate for the increased resistance versus, say, a dripper where you have almost non-existant legs?

4th: What decimal place can the dna 40 read resistance to and how many decimal points does it display?

 

[mikepetro]

30g Kanthal = 8.36Ω per foot
30g Titanium = 5.9Ω per foot
30g NI200 = 0.6Ω per foot

 

[BrokenLung]

30g Kanthal = 8.36Ω per foot
30g Titanium = 5.9Ω per foot
30g NI200 = 0.6Ω per foot

With those numbers, I would barely be hitting around the required 0.15 ohms of resistance using a 5/64th drill bit wrapping a 9 or 10 wrap coil. So maybe it would be best to go with the highest gauge available?

 

[mikepetro]

http://www.e-cigarette-forum.com/forum/blogs/mikepetro/6804-dna40-ni200-wire.html

 

[mikepetro]

Why is 0.15 required? I am making them 0.08 to 0.12 quite easily.

 

[KGie]

30g Kanthal = 8.36Ω per foot
30g Titanium = 5.9Ω per foot
30g NI200 = 0.6Ω per foot

Noting that, as has been discussed earlier in this thread, that that's the resistance of Ni when it's cold; it heats up very quickly when it gets hit with multiple amps, which causes the resistance to go up quite substantially quite quickly. I think elsewhere on this thread are some numbers that list the hot resistance.

 

[dr g]

I tried to read all of the thread, and I did read most of it, so if this has already been answered and I missed it sorry...but...

1st: What gauge Ni200 are we supposed to use with this? What would something like 28, 30, 32, 34 gauge yield resistance wise on a 5/64th drill bit (macro coil) with around how many ever wraps you use? Better yet, does anyone have any resistance per inch type things so someone could put together some form of chart?

2nd: Does the accuracy of the temperature calculation vary with resistance of the coil? I would imagine it would have to considering this is obviously using an equation that has to include the resistance of the coil to calculate the voltage to apply to the wire? If it does vary, does it increase in accuracy when approaching 0.15 or does it increase if you were able to go above 1.0?

3rd: How does leg length affect things? Is it something that if you have longer legs (like a kayfun) you simply up the temperature a bit to compensate for the increased resistance versus, say, a dripper where you have almost non-existant legs?

4th: What decimal place can the DNA 40 read resistance to and how many decimal points does it display?

2. It does not vary with resistance.

3. The temperature is for the whole length of the coil, so long legs do affect things. Depending on whether they are exposed or not you may adjust temperature. BTW kayfun legs are quite short ...

4. Displays to 2 decimal places, but is reading quite a few places beyond that.

 

[BrokenLung]

Why is 0.15 required? I am making them 0.08 to 0.12 quite easily.

Guess it really isn't, especially if it is heating and increasing.

Thanks for all the answers everyone. I might as well stop fighting it and just cave to the notion that I will be purchasing one of these.

 

[Limpar]

I've heard conflicting things about Ti. What're your issues with it?

I think Rossum pretty much covered my main concerns in regards to titanium oxide.

 

[Limpar]

Then maybe temperature controlled devices are not for you.

Maybe not yet, all pros and cons need to be considered.

 

[Ian444]

A few people have been asking about coils and ohms etc for Ni200 nickel wire. Here is a really basic (but should be accurate) excel calculator.

https://dl.dropboxusercontent.com/u/61170900/Ni200a.xls

(edit - enter your data in the green boxes and it will calculate the resistance and wire length)

 

[RebelGolfer72]

In the grand scheme of things, coils were always wound with NiCr until fairly recently, where Kanthal A1 came into favor with the rebuildable crowd (technically Kanthal is a manufacturer, and their A1 grade resistance wire is what folks refer to as Kanthal. Kanthal, among many others also make many types of NiCr as well

Most of those premade coils are made very cheaply in China. Since Kanthal A1 is a proprietary alloy, produced by one MFR, the cost is extremely high compared to generic NiCr that is readily available in China. In fact, if you look at the FastTech site, only within the pat month or so did they start carrying Kanthal. They have, for years, carried the "ready wires" which are a length of NiCr welded to (2) nickel non-resistance legs. You can get them by the thousands there. In fact, compare Kanthal to the "free coils/wire" that ship with many Chinese RBA/RDA...that stuff is most certainly NiCr and not Kanthal A1

Now my big question would be...I know the resistance models have been put into the calculators etc, but how about performance. If I normally use a 8 wrap 24 or 26 AWG Kanthal coil at 22 w now, to get the same performance out of the Ni200, which AWG would be recommended, and at what wattage?

 

[SlickWilly]

In the grand scheme of things, coils were always wound with NiCr until fairly recently, where Kanthal A1 came into favor with the rebuildable crowd (technically Kanthal is a manufacturer, and their A1 grade resistance wire is what folks refer to as Kanthal. Kanthal, among many others also make many types of NiCr as well

Most of those premade coils are made very cheaply in China. Since Kanthal A1 is a proprietary alloy, produced by one MFR, the cost is extremely high compared to generic NiCr that is readily available in China. In fact, if you look at the FastTech site, only within the pat month or so did they start carrying Kanthal. They have, for years, carried the "ready wires" which are a length of NiCr welded to (2) nickel non-resistance legs. You can get them by the thousands there. In fact, compare Kanthal to the "free coils/wire" that ship with many Chinese RBA/RDA...that stuff is most certainly NiCr and not Kanthal A1

Now my big question would be...I know the resistance models have been put into the calculators etc, but how about performance. If I normally use a 8 wrap 24 or 26 AWG Kanthal coil at 22 w now, to get the same performance out of the Ni200, which AWG would be recommended, and at what wattage?

From what I understand the chip will recognize a Kanthal coil but you won't have the temp protection feature. When Kanthal is used will it revert back to the same settings/functions as the DNA 30 used? I'm not sure but guessing/hoping it will.

http://www.e-cigarette-forum.com/fo...-dna-board-interest-thead-6.html#post14336458
"You can still use your old Kanthal builds, but you wont have the Temp Protection feature. The board will automatically sense whether you are using Kanthal or NI200."

 

[Coldrake]

http://www.e-cigarette-forum.com/forum/blogs/mikepetro/6804-dna40-ni200-wire.html

Thanks Mike, some great information there.

 

[Tbev]

Your right Slick

 

[RebelGolfer72]

I guess I need to rephrase what I was asking, since it was buried, and not clear (my fault, I ramble on a bit )

How big is the learning curve going from A1 to Ni200? I have my "go-to" builds with 24 or 26awg A1, and preferred wattage, will there be much rethinking of my coils going to the Ni200 (yes, I want to take advantage of the temp limiting and boost features)

 

[Steeldragon]

well this is the first device I have seen with the DNA 40 Board so I guess we shall soon see what happens


DNA40 HANA MODZ

It says it is being released on the 14th so we shall who gets one and who reviews it. The price is not as bad as I thought it would be just not sure of the Hana's

 

[dr g]

I guess I need to rephrase what I was asking, since it was buried, and not clear (my fault, I ramble on a bit )

How big is the learning curve going from A1 to Ni200? I have my "go-to" builds with 24 or 26awg A1, and preferred wattage, will there be much rethinking of my coils going to the Ni200 (yes, I want to take advantage of the temp limiting and boost features)

It's similar to going to regulated from unregulated, plus a little bit of handling learning.

 

[laurie9300]

well this is the first device I have seen with the DNA 40 Board so I guess we shall soon see what happens

Announcing the Protovapor XPV-DNA40D

We will be releasing DNA 40D-equipped XPV mods on the official launch day, October 14. We have boards and materials on hand and are ramping up for production to get these mods into as many hands as possible. We will include some sample Ni200 wire so users will be able to hit the ground running. We are also working on a temperature control primer of sorts, based on our experiences with the new technology. We will also have Ni200 wire available, and most likely some retail DNA 40D boards.