Understanding Resistance ohm 1.5, 2.0 etc

[Bishopheals]

[h=2]I found this site that helped me to understand resistance in cartomizers from single to dual coils. Thought I share it to some of the new members that may feel challenged in getting the right cartomizers or atomizer for their egos or moded batteries.

Resistances[/h]Undestanding resistances, LR and HV

“LR” stands for low-resistance (for use on 3.7V or less batteries). “HV” stands for high-voltage.
To understand this HV and LR, it helps to be familiar with Ohms Law.
Power (measured in watts) is the intensity of the vape. 6-8 watts is the “sweet spot” for most vapers.
Current (measured in amps) is what can burn out cartomizers. Roughly speaking: around 1.5 amps is fine; 2.0+ amps is risky.
But watts and amps are not properties of cartomizers or batteries. They are derived from cartomizer resistance (measured in ohms) and battery voltage (measured, of course, in volts).

Edit by OS --
This post has been shortened to an extract in order to comply with "Fair Use". Please only copy a short "extract" or teaser and link to the original source.
Read more at the original source:
Undestanding resistances, LR and HV

 

[oldgloria]

Thanks...i needed that

 

[Bishopheals]

Ya it help me realize quick that dual coils at 1.5 oms are really low resistant’s and worked great on my ego battery 1100mah. I received lots of vapor and good taste. When I tried something a higher ohms carto it didn’t give me the same vape enjoyment. After taking some time to understand the science behind it I was vaping a storm and enjoying the succulent flavors and throat hits. I was able to get different kind of cartos and atamizers just needed to make sure of connector and ohms is all.

 

[Sir_Die]

Well done. Thank you.

 

[TalkingCactus]

Bishopheals, In a forum environment that has a noob section for much needed education, it's really an injustice to spread it all out. The more it is consolidated, the more beneficial it becomes for those needing the information.

That being said, why didn't you just add to this three page thread: http://www.e-cigarette-forum.com/fo...-omg-ohm-my-god-help-w-ohms-plz-oh-hello.html where there is already a great conversation going on about Ohms? Instead you started a new one and posted a link to it as your input, or comment, in the already well established conversation taking place.

Could you please take your first comment here and paste it into the other thread, then delete, or close this one? It would be most beneficial to the community if you would. Thanks bunches!

P.S. Please try to cut it down when you copy/paste it into the older thread. I'm very new here, so I don't know all the unspoken rules, but when you copy and then paste an entire page from another Website into this forum, you might be putting the forum owner at risk (unless you got permission). Not sure, so please don't flame me, and I m not trying to pick on you, just looking out for the community incase there's something you and I can do on our own to avoid the potential for trouble. Thank again!

 

[Gsnuff]

nice summary....Thanks!

 

[Bishopheals]

the reason I didn't post there was do to the fact of the audience i was speaking to. The audience i was addressing are ones that are looking for a less challenging answer without the much needed explanation of getting to point A to B. A more simplified so they know what cartomizer and atamizer to get for there battery. no offense it wasn't meant for a theory/law debate.

 

[Bishopheals]

nice summary....Thanks!

you welcome

 

[sailorman]

Ya it help me realize quick that dual coils at 1.5 oms are really low resistant’s and worked great on my ego battery 1100mah. I received lots of vapor and good taste. When I tried something a higher ohms carto it didn’t give me the same vape enjoyment. After taking some time to understand the science behind it I was vaping a storm and enjoying the succulent flavors and throat hits. I was able to get different kind of cartos and atamizers just needed to make sure of connector and ohms is all.

But dual coils are Not low resistance and that's something that discussion leaves out.
A 1.5ohm dual coil consists of two 3ohm, standard resistance coils that just happen to be wired in parallel and so present the battery with a total resistance of 1.5ohm. But they are not 1.5ohm coils and don't reach the heat or produce the vapor of low resistance coils. If there were eight 12ohm coils in there, it would still be a 1.5ohm carto, but it wouldn't produce very good vapor.
Assuming your eGo battery is 3.7V, you are vaping with two coils, each consuming 4.56 watts.

Imagine taking two eGos and fitting each of them with a 3ohm, SR carto.
Now, vape both of them at the same time.
That's not too far off from what you are doing with a dual coil on a 3.7V battery.
There may be a small improvement over the two SR carto in the "2 eGo" example due to some "preheating" by the first coil, but certainly nothing like what a low resistance coil, or a pair of them, would produce.
So, they are not really low resistance at all. Only the battery thinks they are.
You really need at least 4.5+ volts for dual coils to really work well.
Otherwise, you are getting all the battery strain of a LR carto, without the benefit (higher wattage) of a LR coil.
Below approx 4.5V, you get a lot of lukewarm fog.
2 x 4.56 watts =/= 9.12 watts any more than two 225 degree bbq grills equals one 450 degree bbq grill.

 

[Bishopheals]

Hello Sailorman, thank you for your info. the information I was trying to relay had to do with the attys that i bought from dragonflyecig.

JOYE eGo-T (Tank) Low Resistance Atomizer Type B (Cylinder) (EGOTLRATTB)

It was listed as dual coil low resistance at 1.8 ohm but on the checker it would read 1.5-1.6 ohms which is why i said 1.5 ohms on top. I do get what you said this was intended for the folks that don't want nor have the time to deal with technical bells and whistles. They just want to vape as quickly and painless as possible.

Now for me on the provari thats another story Im still working with different resistance from highs etc getting the right vape at 5.5 to 6v. I'm sure you and I can have some good discussion on that later on.

 

[DaveP]

Here's a web page that lets you play with the values and see the results. It's a quick and easy way to find out what happens when you vary voltage and resistance.


Voltage current resistance and electric power formula calculations calculator general electrical pie chart electricity calculation - electrical power formula general ohms law physics electricity electronics formula wheel formulas amps watts volts ohm

 

[sailorman]

I get you Bishop. I think it's misleading of the manufacturers to advertise dual coil cartos as low resistance. They're only low resistance in the technical sense. I understand that they have to call them that because of the current issues, but it's a massive point of confusion. It leads to such stupidity as people claiming, on one hand, that a Lavatube won't work with a DC because it detects a 1.5ohm load and drops the voltage to 3.7. Then, on the other hand, they turn around and extoll the virtues of DC cartos on their 3.4V eGos.

Put your DC carto on your Provari and run it at 5V. Then you'll find out what DCs can do. Half the result of using a DC carto on an eGo is placebo or just the lack of a point of reference. If you liked vaping with 5 watts on your 510 slim battery, you'll like vaping with a DC carto on your 3.7V eGo twice as much.

But, in the end, 2 x crap is doublecrap.

The folks that just want to vape as quickly and painlessly as possible need to avoid the DC carto hype and stick to single coils of the appropriate resistance. A pox on Smoketech for pushing them on unsuspecting noobs by implying that they're the best carto to use with their "Dual coil tank".

 

[DaveP]

I find that a Smoktech DCT dual coil 1.5 produces a great vape on a 3.4v eGo 1000mah battery. I think the satisfaction comes with two 3 ohm coils producing a lower wattage vape that is enhanced by the doubled area of the coil wire that touches the juice. When you have twice as much juice in direct contact with a 3 ohm coil, you get more vapor without the burning effect of a hotter single coil wire. It's more of an efficiency thing designed for those who want more flavor without the high heat associated with a single 1.5 ohm hot wire.

I find them pleasing.

 

[sailorman]

I find that a Smoktech DCT dual coil 1.5 produces a great vape on a 3.4v eGo 1000mah battery. I think the satisfaction comes with two 3 ohm coils producing a lower wattage vape that is enhanced by the doubled area of the coil wire that touches the juice. When you have twice as much juice in direct contact with a 3 ohm coil, you get more vapor without the burning effect of a hotter single coil wire. It's more of an efficiency thing designed for those who want more flavor without the high heat associated with a single 1.5 ohm hot wire.
I find them pleasing.

I can certainly understand that. Sometimes lukewarm fog is pleasing and, like I said; if you like a 4 or 5 watt vape, you'll like DCs on a low voltage PV.

I'd love to see a 1ohm DC. It would play havoc with cheap batteries, but it would put out good vapor at a decent temperature on 3.7 or even 3.4V. Few people think 6 or 7 watts is too hot, but when you start getting into less than 5, or even 4 watts, like the 3.85 watts you get from a DC on 3.4V, that's not even lukewarm. You might as well drink your juice on the rocks.

 

[DaveP]

I can certainly understand that. Sometimes lukewarm fog is pleasing and, like I said; if you like a 4 or 5 watt vape, you'll like DCs on a low voltage PV.

I'd love to see a 1ohm DC. It would play havoc with cheap batteries, but it would put out good vapor at a decent temperature on 3.7 or even 3.4V. Few people think 6 or 7 watts is too hot, but when you start getting into less than 5, or even 4 watts, like the 3.85 watts you get from a DC on 3.4V, that's not even lukewarm. You might as well drink your juice on the rocks.

I like a slightly warm vape. I don't care for cold. Right now, I'm vaping a Boge 3 ohm stainless at 3.9v on my Provari. I will switch it from 3.7v up to 4.2v, depending on what seems good at that point. I'm at 5 watts at 3.9v (cool), but getting only slight warmth in the vape. Go figure. If I vape a Boge 2 ohm, I hit close to the same voltage, about 3.7v to 3.9v. I've verified the readings with an inline DMM and they are correct, as advertised on the Provari voltage indication readout.

When I hear about people who vape at 12 to 14 watts, I wonder if they ever get blisters on their tongues!

 

[oldsoldier]

Although DV is a froum supplier here, forum rules require you follow the doctrine of fair use:

http://www.e-cigarette-forum.com/forum/ecf-forum-rules/51178-forum-rules.html

6. Copyright
You must not post material on this Website that you do not own the copyright to, unless it is done so under a Fair Use agreement. Only one paragraph or 300 words may be posted, whichever is the greater, and a link should be given to the original source.

 

[Bishopheals]

Here's a web page that lets you play with the values and see the results. It's a quick and easy way to find out what happens when you vary voltage and resistance.


Voltage current resistance and electric power formula calculations calculator general electrical pie chart electricity calculation - electrical power formula general ohms law physics electricity electronics formula wheel formulas amps watts volts ohm

Davep thanks for the calculator that always helps. if the users start asking how to use that calculator im going to point them to you Dave

 

[DaveP]

Davep thanks for the calculator that always helps. if the users start asking how to use that calculator im going to point them to you Dave

It's just one that you input the variables you know and it does the rest. For instance, you know the voltage and resistance. You enter those and it fills in the wattage and amperage for that voltage and resistance.

The color wheel just gives you the formulas for manually calculating just about anything that Ohm's Law can produce. You decide what you want returned, (P)ower for instance. It shows you in the blue sector the three formulas for calculating power in watts. For some formulas, you have to go and do another calculation first to produce one of the variables. Usually, one of the formulas will fit the information you have available. For ecigs, you will always know the voltage and resistance, so the applicable formula would be V^2/R.

That's what the first calculator is for ... to prevent you from having to jump through the hoops!

 

[Bishopheals]

@sailorman thanks for your info,

In regards to putting my dc carto to my ProVari at 5v I tried a few things. I eGo adapters so I can test out the performance and vaping taste using the cartos and attys from eGo with the provari and push the limits. Since the ProVari has a safety to protect your carto and atty I had little to worry about.

I tested the LR eGo-T atomizer that registered at 1.5-1.6 ohm on my ProVari. First at 3.2 volts which gave me a lurk low warm feel. (I really wasn’t that pleased, I got ok taste just not enough humph) I proceeded to rise up the voltage by 1v increments. I notice the higher I went the better taste and hit I got. When I got to 3.9 volts. It was getting a nice hot vape and it hit my tongue so good. I then wanted to push it higher but I got errors to reduce voltage when trying to go past 4.0v. I then tried a Smoketech dual coil DCT carto 1.5 ohm(meter rated 1.6-1.7) that puppy I was able to enjoy the hot vapors of 4.1-4.2v. I then tested out another Smoketech dual coil DCT carto 2.5 ohm (meter rated 2.4-2.5) I was able to vape at 6v with no issue. I felt it would even go higher than 6v but my ProVari would only go 6v. At 6v it raised the strength of the juice (grew hair on my chest) excellent vapor and throat hit. This got me so loopy that I had to reduce nicotine from 24mg to 18mg. I got a good performance and a good feel from it. I did enjoy it a lot using Smoketech dual coils in a dct map tank. It works great good performance and less time needed to refill my juice. I didn’t have it easy in the beginning using a tank system that’s for sure but sucked it up and researched and learned how to use it right. I have been a happy vapor since.

As for the single coil cartos I did order some Boge 510 Carto 3.2 ohm to try on my ProVari 5v-6v I can’t wait to compare and experience the difference between the cartos I been smoking.

 

[TalkingCactus]

BishopHeals, I only meant to point out the bad mojo of copying a whole page from someone's site, and possible legal issues for this site's owner. Kinda trying to get you to change your post a little to be fair to the site that you boosted the content from. It's sore spot for me because I pour blood, sweat, tears and countless hours and dollars into my Web sites, since 1997. But people still seem to think they can take my content and use it on their real estate sites, battle it almost weekly. That's why it's a hot topic for me. But your intent is innocent sharing of information, which I applaud you for! Just wanted to keep you and ECF's owner out of trouble. That's all. Sorry I came across as wanting a law debat. (/chit chat) (vape and ohm talk!) <--- a little Webmaster humor

Any-who... I get your intention of posting that info separate for this who just want to vape great vapor, and not know how they got there. But I think you're seeing that it's not that easy. No "one size fits all" regarding ohms. Just look at all the testing you've had to do, thos thats my preferred route too "hands-on". Even if you get the perfect range of watts for the person you're targeting, their tastes might like a colder/hotter vape. OY VAY! So good healthy discussion is great!

I'm finding now that I like a warmer vapor, especially w/my tobaccos. While cherry, my favorite flavor, I like a little cooler than the rest. I am loving all the info that is coming out in this thread about ohms! Armed w/this knowledge I'm not so worried about my constantly changing, hopefully evolving, tastes. Nice!

BishopHeal, peace. See you around the forum, as we learn about our new undertaking
SailorMan, you're quickly becoming a source of great information, for me. Thanks.
DaveP, thanks for the link.