Can someone please explain to me what the different ohms in the atomizers do? I've ordered a mini viv and it comes with 1.8ohm, 2.4ohm, and 3.2ohm ... if it matters the battery I ordered are eGo 900 mAh batteries... with an 18mg liquid...I smoke a little over a half pack a day of camel lights... any suggestions on which one to try first?? My order should be waiting for me when I get home from work... I'm really excited to try this and be done with cigarettes I'm hoping the pack in my pocket is the last one I have to buy!!
- Status
The best will be the 1.8 ohms on your eGo. The vape will be warm. 2.4 ohms will work but will be a weak vape. The 3.2 ohm is meant for higher voltage devices. Here's a chart:
Since taste and performance is subjective I just have to say do not put much into the chart... So its only good for starting point but I find myself 'in the red' more often than not (and never had thermal failure of a cart... also use VV and all have 10second switches with throttling) also the chart is based on very arbitrary assumptions. The minor differences this chart does not take onto account make abigger difference... i can use the same juice same DCT on two different devices at the same load/current and each will taste different as one is pulse driven and the other a linear boost driver.
I vape at what tastes best sometimes I will pump my DCT cart at 4.8 volts with a 1.5 ohm cart
So dont go oanicking if you find yourself running at 4.5 with a 1.5 cart to get the best flavor... which is why i hate charts like this because they do more harm than good... and they assume you are the same as the person who made it and you and using the exact same equipment... besides it will only melt if running dry, as the juice cools the coil through evaporation... which is why you can tell the maker of said chart doesn't have a physics degree and why thermal dynamics is an alien concept to them...
I vape at what tastes best sometimes I will pump my DCT cart at 4.8 volts with a 1.5 ohm cart
So dont go oanicking if you find yourself running at 4.5 with a 1.5 cart to get the best flavor... which is why i hate charts like this because they do more harm than good... and they assume you are the same as the person who made it and you and using the exact same equipment... besides it will only melt if running dry, as the juice cools the coil through evaporation... which is why you can tell the maker of said chart doesn't have a physics degree and why thermal dynamics is an alien concept to them...
Ohms = Amount of "electrical friction".
So low ohms = less friction slowing down the flow of electricity = hotter.
They actually call it "resistance". The degree to which a material resists electrical flow. It's the value of a "resistor" in electronics and really everything else (all other parts/components) has some resistance too.
Note a handy formula for vapors: Voltage Squared divided by ohms = watts. Watts = V*V/R
So if you know the voltage of the device, and you know the ohms, you know the watts. Shoot for a value in the 6 - 9 range. Varies depending on devices and your preference.
So low ohms = less friction slowing down the flow of electricity = hotter.
They actually call it "resistance". The degree to which a material resists electrical flow. It's the value of a "resistor" in electronics and really everything else (all other parts/components) has some resistance too.
Note a handy formula for vapors: Voltage Squared divided by ohms = watts. Watts = V*V/R
So if you know the voltage of the device, and you know the ohms, you know the watts. Shoot for a value in the 6 - 9 range. Varies depending on devices and your preference.
http://www.rmcybernetics.com/images/main/pyhsics/ohms-watts_law.jpg
More info than is needed....
Resistance only exists in theory, impedence is reality... remember as electrical systems heat resistance will change, which makes it more complex, impedence accounts for thermal variation, granted at the power levels we are dealing with it is minute... so in reality the rwsistance only exists at a stated level from a second, with a thermal increase of ~10% as temp increases... for vaping purposes... essentially once the coils heat they require less power to keeo heated (from thermal dynamics standpoint) though again for PV purposes the difference is minute, given power levels and temps involved.
So how do I know what voltage my batteries are? I looked at the website and didn't see any tech specs on that... here's what i got..
Smok Tech 510 eGo-T Kit
Disregard the tanks, after posting what i got, most people said they leak and i should get a vivi so i bought that separate
I also read the product description again and it says not to use any atomizers with less than 2.0 ohms ... is that just safety bs that i can disregard? (manuafacturer covering their ... type of stuff)
Smok Tech 510 eGo-T Kit
Disregard the tanks, after posting what i got, most people said they leak and i should get a vivi so i bought that separate
I also read the product description again and it says not to use any atomizers with less than 2.0 ohms ... is that just safety bs that i can disregard? (manuafacturer covering their ... type of stuff)
Oh and higher the resistance the more energy that gets wasted and turned into heat... because it takes more power to overcome the impedance for a demand draw type system... ecigs are controlled draw system
I and many others have used the chart with great success and I also run in the chart red but I have VV and 3.7 volt PVs. If he were running VV I would suggest he use the 2.4 ohm and start at low voltage and turn it up until he finds the "sweet spot" with individual juices BUT OP is using an eGo 900 mah that fires @ 3.3 volts.
The best will be the 1.8 ohms on your eGo. The vape will be warm. 2.4 ohms will work but will be a weak vape. The 3.2 ohm is meant for higher voltage devices. Here's a chart:
Very nice Vapoor...thanks for posting! I can vouch for the 1.8 ohms on an eGo, the perfect combination for me.
Here is a easy OHM's law calculator.
Ohm's Law Calculations With Power
Enter two values to calculate the third value.
If I know the "sweet spot" of my juice is 6.5 watts and I have to *2.4 ohm atomizer
I can use the Volts calculator (lower left) to determine the volts = ~4 volts
The sweet spot can vary for different juices but generally between 6 to 7 watts
*Be aware that the stated resistance of an atomizer is not exact and can vary (+ or - .2 ohm)
Also the resistance can change as the atomizer ages.This is why variable voltage batteries are popular. You don't really have to worry about your resistance, just turn it up until you like it.
Ohm's Law Calculations With Power
Enter two values to calculate the third value.
If I know the "sweet spot" of my juice is 6.5 watts and I have to *2.4 ohm atomizer
I can use the Volts calculator (lower left) to determine the volts = ~4 volts
The sweet spot can vary for different juices but generally between 6 to 7 watts
*Be aware that the stated resistance of an atomizer is not exact and can vary (+ or - .2 ohm)
Also the resistance can change as the atomizer ages.This is why variable voltage batteries are popular. You don't really have to worry about your resistance, just turn it up until you like it.
They fire at 3.3- 3.4 volts.
Yes I've got friends that run Smok Tech 1.7 single coil cartos on their eGos.
This kit is a 3.7 volt kit, any time you buy an e-cigarette that the battery is pre-made into the unit you are dealing with 3.7 volt unless it is stated that the unit is a variable voltage unit, however this one will more than likely be closer to 3.3 or 3.4 when firing after overhead. A variable voltage unit will allow you to adjust the voltage as you go to suit your taste and lets you use a variation of resistance in your attys and carts. And yes, the manufacturer is covering their butts, you would be fine even going down to a 1.5ohm atty or cart on a 3.7 volt unit and as a matter of fact you will more than likely not have a great vaping experience with anything much higher than 1.5ohm IMHO and experience. Though i have had some success with 1.7 and 1.8 ohm of different manufacturers. I hope this helps. When you first get into vaping it is overwhelming, there is so much information out there and so many different types of devices that it almost blows your brain up. The key is to start out slow and find what satisfies you and the amount of fiddling that you can put up with on a daily basis and what makes sense for your budget.
You are getting a good start with the kit that you have chosen and the vivi nova, the 1.8ohm that comes with it should be just right but i like a hard hitting vape, but you can try the different ones and see which one works best then simply buy replacement coils at the level that works best for you.
Last edited:
Impedance is only relevant in an AC circuit in which phase angle is greater than 0. There is no inductive or capacitive reactance in a DC circuit thus resistance is appropriate for e-cigs. (Unless someone comes up with an AC generator mod or a pass-through that plugs directly into a wall outlet...lol hmmmmm)
OMG. Just OMG. Way too much. Way off topic for what he was asking. Way not the point.
Dude. This is a guy basically asking "what does 'ohms' mean". Some info is good, but.....do you really want to get into a detailed discussion of coil thermodynamics at this point?
I'm glad you're a contributor to the forum though. There's a ton of good stuff to comment upon, particularly in the modder's area where you will find a lot of people that like to kick this around.
You hit the nail on the head there... its a lot of info to take in, I think I'm starting to understand it though. I can see how this can get a little spendy, I haven't even started yet and can already think of more stuff I think i need, or different stuff I think I need... This thread has been very helpfull, now I know why people get the VV batteries and why a higher voltage is nice, and I also understand the ohms now..
I'll start off with the 1.8ohm and if I think I need a stronger throat hit, I'll look at getting something lower or maybe upgrading to a VV battery
I'd also like to toss out a big thanks to this forum.. If I hadn't found it I think i would have gone with a big market ecig like blu or v4l just because of its ease of use and ordering, but I can tell already that digging farther into vaping, trying to understand the parts and the ins and outs of vaping is going to pay off in the long run..
Not when you have ICs with their own impedance or a linear pulsed regulated driver in which the EM flux causes magnetic induced impedance...granted the variations caused by the power levels at hand are minute and frankly a none issue...
Oh and I am actually working on an AC pass through mod, the AC frequency providing the pulse width with a good ceramic resistor series and heat sinking. Have an email industrial size arctic alumina kit for that bad boy.... won't be VV but would be very inexpensive and long lasting. Timing circuit is going to reside in the switch via thermal coupler which also serves to prevent overheating
Last edited:
so on an ego twist, would it be best to use 1.8 or 2.0 resistance for the vivis? i have to confess that the only difference i'm noticing with the vv control is a bit of a burnt taste so far, and i'm thinking it's because i'm using the "stock" heads that come with the vivi nova minis (2.4 i think).
also, whenever i use the stardust or t2 type clearos, i end up getting a burnt taste as well after the fill line depletes from the top. any ideas?
thanks in advance!
also, whenever i use the stardust or t2 type clearos, i end up getting a burnt taste as well after the fill line depletes from the top. any ideas?
thanks in advance!
Sounds like juice is not wicking fast enough or that you burnt the fill/wick too much. May need longer wick or repack the fill removing any burnt areas and if it packed very dense lighten it up a little bit. That should increase flow. Sometimes the coil may be too close to the wick or fill as well....
"Ohms?"
"Yes Wattson?"
Eh? Ehhhhhhh? Anyways, I've used LR (1.5-2.0) feeds on my egos. I find the 2.4 to be unsatisfactory, though my wife thinks they're great. Since you're getting 3 heads you can choose which is best for you. Start with the 2.4, if you find it suboptimal for vapour production/flavour finish the tank up, rinse it out and try out the 1.8. No two vapers are alike, you have options so it's best for you to find what suits you.
As to a burnt taste when using VV, start at a lower voltage and turn it up slowly, different juices will taste burnt at different voltages.
"Yes Wattson?"
Eh? Ehhhhhhh? Anyways, I've used LR (1.5-2.0) feeds on my egos. I find the 2.4 to be unsatisfactory, though my wife thinks they're great. Since you're getting 3 heads you can choose which is best for you. Start with the 2.4, if you find it suboptimal for vapour production/flavour finish the tank up, rinse it out and try out the 1.8. No two vapers are alike, you have options so it's best for you to find what suits you.
As to a burnt taste when using VV, start at a lower voltage and turn it up slowly, different juices will taste burnt at different voltages.
Last edited:
- Status
Similar threads
