This is one of the features that the dna 40 is supposed to stop or help mitigate. the temperature control notes a rise in the temperature of the coil, that the vaper pre-sets, and backs off on the wattage supplied to the atty to prevent dry hits and burning of the cotton etc.
As I've mentioned before...I've been too busy this year to really keep up. How does it measure the temp at the coil?
Hmmm....they are measuring the change in resistance due to heat...I'm guessing. It's an estimated/calculated temp...not a separate thermometer of any type. Still...very interesting.
IDK much about using nickel wire either.![]()
it is a resistance thermometer so it is just measuring the change in resistance and calculating the temperature from T = T0 + (1 / alpha) (R / R0 − 1) where T0 is reference temp for alpha, R0 is resistance at a reference temp and alpha is the temp coefficient for the material. In other words, once a certain amount of resistance change is noticed by the board relative to the cold value, it will throttle back the power.
I’m guessing that Nichrome/Kanthal can’t be used because where alpha for nickel is about 0.006 it is much smaller for nichrome (0.0002) which would require much more accurate resistance measurement, but in theory it could be done.
Those worried about nickel could always trick the board using iron wire which also has an alpha around 0.006.
atty's got itand pepper better better forget what he's learned about 'ohms' so far
back to cleaning ................
p.s. I would like to keep my coil as close to 1 ohm as possible, rather than seeing how low I can go.
that ^ i was referring toyou will not see a nickel coil with that resistance!
hiya, early morning survivor frannie !
why are you so contrary today?resistance is measured in ohms! you will not see a coil approaching 1 ohm with nickel wire
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Time to go to the gym. I need to work out some frustration.

my coil as close to 1 ohm as possible
My cute as a button,slim and trim 22 year old grand-daughter has aspired to be a cop for the last 10 years. She graduated college and she's going for it. Looks like she'll be accepted by the State Police.
Atty, here's a video by basil showing how the temp control works on the rDNA 40. Interesting and very well done, if you care to look.