Interest Check: Custom Resistance Atomizers

[Kewtsquirrel]

To answer honestly: I have no idea. I'm assuming that they just added extra turns, but until the package arrives and I can inspect them, I'm not entirely sure.

As for the rheostat: Yeah, you could, the whole point of higher-resistance atomizers is ease of use and assembly. Instead of trying to figure out how to pack more and more stuff into a mod, you can go back to the tried and true "battery tube with a switch" and toss a higher resistance atty on.

I'm also expecting that the extra turns+increased surface area of the coil will produce even more vapor than a 5v regulated standard atomizer. Same wattage, more surface area, SHOULD mean more vapor.

But I really have no idea, I'm pretty sure everyone who ordered these knows that it's all just guesswork at this point. Not quite wild-assed guesswork, but still unproven. ^_^

[Scottes]

As for the rheostat: There's no doubt that it would be inconvenient. I suggested it because it might be an easier way to figure out the appropriate resistance.

But, thinking it through, more winds around the coil seems like the better way to do it, and the rheostat would probably just find the appropriate voltage for that particular atomizer.



Anyone have any idea what the variance is amongst atomizers? I've seen posts saying things like "801s are 3.5 Ohms" but it that +/- 0.1? Or +/-1? But I've seen other posts stating that "an 801 that's about to die will read much higher, like 12 Ohms" (or something very high). Even if a used atty has double the original resistance, isn't that half the wattage? (I have no idea - slap me stupid if an increase in resistance does not change the wattage.)

Sometimes I think that there are just so many variables that I don't understand what we're chasing.


And please note that I am not slighting your efforts here. I appreciate the heck out of them, and want to join in. But the computer QA person in me wants to eliminate all other variables, and just test the resistance of the atomizer. This means that batteries can't be used, one needs to use one juice and only one juice and all from one batch, and keep copious notes, and... Well, sometimes I just want to enjoy the vape. Life's a bitch sometimes.

[Kewtsquirrel]

Well, since we're testing this specifically *for* batteries, they have to be used - trying to eliminate that variable when it's explicitly the purpose for higher resistance attys just won't do.

The trick will just be watching the voltage on the batteries and trying to only use new ones for testing, before the discharge profile gets all wonky from too many discharge cycles at a higher current than was designed for. 2 18650s in series would work well too, as they'll still be discharging under 1c they shouldn't suffer from too much from the work.

The other problem with a rheostat is we don't know yet how the extra turns on the coils are going to affect vapor production - until they arrive it's all just guesswork. From tracking info I've got though, it looks like they should arrive Saturday, so we'll be able to start the testing really soon.

[crashtestjeep]

Nerf-for testing, will 2 cr123's 3.7v used together be ok? I have plenty of new ones! Also, are we testing at 6v as well? (2 3v cr123's)

just want to be sure I have the right setup going!

[funkybozu]

i think the attys are designed for 2 3V batts
if i suspect how they made the atties then running them at 7.4(8.4V) will will
do the same as a normal atty at 6V but with more vapor
what im really interested in is the quality of the nichrom wire

[Scottes]

Wattage = Voltage*Current

Current = Voltage/Resistance

So, if we want 10 watts, and our peak voltage is 7.4, subtract about half a volt to give you some room for the drop and battery and do the math.

10 = 6.9*(current)
Desired current = 1.45A


1.45 = 6.9/x
1.45x = 6.9
x=4.8 ohms

So, running 7.4 volts (2x 3v cr2s or cr123s), to get 10 watts you'd want a 4.8 ohm resistor.

If my math is correct...
As Nerf says above, with two 3.7v batteries, with voltage drop down to 6.9 volts, a 4.8 Ohm atomizer will hit 10 watts and 1.45 amps.

Using two 3.0v RCR123A LiFePO4 batteries, *assuming* a voltage drop down to 5.6 volts, a 3.1 Ohm atomizer will hit 10 watts and 1.9 amps.


The 4.8 Ohm atty would have a longer coil, and more heating area, which should produce more vapor. If so, this is beneficial to us, so a pair of 3.7v batteries would be preferred.

Would less amps mean that the atomizer would have a longer expected lifespan assuming the same gauge coil? If so, this would also be beneficial to us, so a pair of 3.7v batteries would be preferred.


Any thoughts? What is the upsides and downsides to 6.0v versus 7.4v?
And LiFePO4 vs LiOn?

[Applejackson]

This is all very interesting to me... gonna wait til the first batch is out and tested before ordering any though.

[Kewtsquirrel]

I think lifepo4 can discharge at a higher rate than liion, as for 6v for 7.4v, I don't really think theres going to be a difference, and if we all find that perfect wattage/ohm rating/etc, we can tweak it so that an atomizer for each voltage is available instead of one for both. I tried to find a happy medium with this order, as its all guesswork - eventually I'd like each voltage to have its own atty.

[crashtestjeep]

Awesomeness...My maillady better drop my mail n run bc Im tearing into that package the second it sees my neighborhood. Thinking of camping outside next week til it arrives...fresh new charged batts in hand

[funkybozu]

I think lifepo4 can discharge at a higher rate than liion, as for 6v for 7.4v, I don't really think theres going to be a difference, and if we all find that perfect wattage/ohm rating/etc, we can tweak it so that an atomizer for each voltage is available instead of one for both. I tried to find a happy medium with this order, as its all guesswork - eventually I'd like each voltage to have its own atty.

So witch ones do we get lol 6v or 7.4??