kbriggs
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Posts posted by kbriggs
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1 hour ago, VapingBad said:
No it monitors current and adjust voltage to regulate wattage, resistance measurement is not needed at all for that. .
So it's measuring current and calculating P / I to get V instead of measuring resistance and calculating sqrt(P * R) to get V? That's interesting and would be a faster calculation. Now if you told me the chip did not have a sqrt() function built into it then what I'm asking for wouldn't be possible. But I doubt that's the case.
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1 hour ago, VapingBad said:
but it is pointless metric for everyday use
It may be pointless to you but not to me. Some people have no use for a tachometer in their car and some like to know where their red line is. I also use mech mods where I'm very cognizant of voltage and will usually build on a DNA device before moving it over.
And yes, I was lumping the power equations in with Ohm's law since they are interconnected.
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59 minutes ago, VapingBad said:
No offence, but you are not getting it is not one of those mods that just measures res to work out the voltage to use, it is more sophisticated and regulates watts in real time.
You are one not getting it. I know that DNA boards adjust voltage in real time if the resistance changes. And they do that by sampling the resistance at regular intervals and then recalculating the voltage it needs to send out via Ohm's Law. So what? The sampling rate is irrelevant. Wattage is not an electrical property, it's a calculation of power. The board doesn't send "watts" to the coil. It sends volts that are calculated from the desired watts and the measured resistance. And the resistance of Kanthal does not change in real time anyway, or at least not enough to even measure. The voltage that it settles on is perfectly predictable using Ohm's Law. I can see it directly on the screen if I fire and hold. But it reverts to 0.00 when I let go and thus cannot see it. I want to see it without firing. DNA boards are no different than other boards in how they calculate what voltage to send based on the wattage set in power mode. They all use Ohms Law.
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1 hour ago, VapingBad said:
DNAs just don't work like that, they are true variable wattage regulators and don't just measure res and fix the voltage to provide the wattage, they constantly balance the voltage and current to sustain the wattage.
On a Kanthal or Nichrome build in power mode, the voltage eventually gets to a steady output, specifically the square root of (watts * ohms) per Ohms Law. I just want to see that value cold before firing instead of just 0.00 like it shows now. I don't care that it may be off by 0.01 volts or so once the firing commences. I just want the extra bit of information so I can see what the eventual target is. This would be a trivial change to the firmware. It changes nothing in how the device operates and requires no UI changes.
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1 hour ago, Dr.Zelon said:
He is JUST asking to let them see the volts without having to press fire... its not very difficult to understand
Exactly.
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1 hour ago, shugg1967 said:
I did my research
By the way, VaporDNA is still advertising the Therion and all their other DNA167 devices as having a 7.4 volt capability, despite the fact I told them otherwise months ago.
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retird said:
Having the calculated voltage on the display won't solve that.
Understood but it's handy to see where I'm at at any given time. I have dozens of mods, RTAs and RDAs and I'm swapping them around and trying different builds at different wattages with different airflow configurations, etc.Do you have any builds that you use on the 133 in TP, or in Wattage mode, that give you a great vape?
Yeah, I can build lower, and do. I was just giving an example of where it has occurred before. -
retird said:
@kbriggs....... just wondering what coil build you are using that runs so close to the max output voltage and at what wattage setting....
I have one particular dual clapton kanthal build (7-wrap 26g/36g, 0.52 ohm) in my Limitless Plus RDTA that I like at 85 watts. That's 6.65 volts and perfectly fine on my DNA 200 but a total fail on the 133 with its 6 volt limit.
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VapingBad said:
As I said I am not exactly sure what your issue is, but if it is that the store you bought it from gave incorrect specs
That's a separate (although related) issue I addressed in the other topic. Here I'm asking for a simple feature change that would be trivial to implement in the firmware.
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VapingBad said:
Sorry you have lost me completely, it shows live watts.
All mods, including DNAs, have a watt limit and a volt limit. For example, the 2-cell DNA 250s have a 167 watt limit and a 6.2 volt limit and whatever hits first is where it stops. So if I have 0.50 ohm build, I can't get anywhere near 167 watts because it'll hit the 6.2 volt limit at 76.88 watts. So it would be super handy if (1) the wattage indicator would stop there so I don't waste time going higher and (2) the volt readout that I have configured to show on the left side would give me the V = sqrt(W*R) calculation while idle (instead of 0.00 as it does now) so that I could see how close I'm getting to that 6.2 limit.
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giz_60 said:
It's really pretty simple...no calculator needed...set your device to the max wattage you desire & vape...if it cant maintain that wattage, it will give the most wattage possible
If it can't maintain the wattage I set then I want to know it, and if that reason is because it will exceed the voltage limit, I want to know that also. Then I can make a more informed decision and possibly change my build. This would be a simple coding change that gives a little more information to the user without affecting how the device operates.
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retird said:
They make Ohm's Calculator apps for cell phones
They don't make one that will read my mod screen and show me the voltage as I'm adjusting the wattage up and down.
And speaking of that. If while adjusting the wattage (on a DNA 167 mod, for example) and you happen to hit the 6.2 volt limit before hitting the 167 watt limit, the wattage indicator should stop incrementing right there because anything more will never get there. And if I'm wondering why my 167 watt device won't allow me to go any higher, I'll see the voltage indicator is reading 6.20 (instead of 0.00 as it does now) and I'll know. -
retird said:
I think you can just fire the mod while not vaping and see the voltage.
Yes, but I don't want to fire without pulling air through as that risks charring the wick. It make take several seconds to settle in on the final voltage, depending on the profile. I want to see the target voltage as I'm adjusting the wattage instead of just showing 0.00. I'm not good at calculating the square root of W*R in my head and shouldn't have to lug around a calculator just for that.So your suggestion is to add an Ohm's calculator into the firmware only for wattage mode....
Yes, just like every other chip does it now and has for years. -
retird said:
Even if your request was added, the voltage reading would only be as you said, a calculated number, and would not be accurate.
It would be accurate for wattage mode, which is the only context I am referring to. -
I like to know the voltage output of my mod for the selected wattage. Particularly on my 133 devices that have the 6 volt limit. I can configure escribe to show that on the left side but it only displays during live fire, which of course I can't see while vaping. It just shows 0.00 while idle. I'd like to see this changed (or a new option added) that shows the Ohms Law calculated voltage for the given wattage.
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retird said:
the only reason we have the 133 and 167 option is because a couple years ago people asked for it here in this forum. people were fully aware of the output voltage limitation when in 2S mode.
I can forgive the limitation in the 200/133 but Evolv could have addressed the issue in the 250/167 product (which came out later) and chose not to. Advertising a wattage increasing without a corresponding voltage increase is a bit of a sham IMO.
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ChunkyButt200 said:
do you own a DNA 200 or 250?
Yes, I have a pocket-unfriendly Reuleaux DNA 200. Fortunately its 9v output is adequate. And the HCigar VT133 with the 200 chip as I mentioned. And a Lost Vape Therion 166 with the 250 chip in route to me as I write this with the falsely advertised 7.4v output from VaporDNA (and at least a dozen other vendors), which apparently no one else on the planet noticed except for me.Evolv' s boards will give you the wattage you select until the very end cell voltage range
Except or course it might not give you the wattage you select at all due to the low voltage output in 2-cell mode. You have to build at or below 0.23 ohms to access the full wattage range in the 167w configuration.
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ChunkyButt200 said:
it cannot do it because it's buck only no boost.
Sounds like a poor design choice made on day 1.it cannot go over battery voltage, as is the case with MANY other 2S (2 cells in series)
What other 2S system maxes at only 6.2 volts? Why is the completely drained condition of 3.1 volts per cell (x 2) the upper limit instead of at least the nominal condition (3.7 x 2)? -
Evo1340 said:
Wow, I don't think I've ever vaped over 5V.
All my clapton builds need at least 5 v. It's rare that I go over 6 but it's ridiculous that this $80 chip cannot do it. -
Well that sucks. If you google "Therion 166 7.4v" you'll see site after site after site with that bogus number. It's probably all copy and pasted from Lost Vape. I've got some dual clapton builds above 0.5 ohms that I like and I'll hit that stupid 6 volt limitation well before I hit the 133 watt limit. Now I get to hit it way way before the 167 watt limit. Woohoo, what a great design decision there, Evolv. Even my little single battery eVic Mini can go to 9.5 volts.
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ChunkyButt200 said:
AMDTrucking - i made a mistake, it's actually 6.2v
Is this still accurate information? Because I've seen multiple online stores like VaporDNA here:
https://www.vapordna.com/Lost-Vape-Therion-166-DNA-167-Box-Mod-p/lvt167.htm
claim that the 2-cell "DNA 167" can output 1 to 7.4 volts. I specifically just ordered a Therion 166 because I'm tired of bumping into the 6 volt limit of my HCigar VT133. I'm going to be really p.o.'d if I find it has the same voltage limitation. Please confirm.
I need to know DNA250 voltage and current limitations in 167 Watt (two 18650) configuration
in General Discussion
Posted
In a two-cell configuration?