Can someone please explain ohms significance?

[gorillainthemist]

Hi, what's the reason for different coils having different resistance readings? What bearing does it have on the way the ecig heats up the coil and vaporises the liquid?

I am planning on buying the MVP V2 and using it with my Protank II. How will it be different, if at all, to the way the Protank II worked with my itaste vv?

 

[Tmg666]

If your using stock coils you really won't need to wory about the ohms persay. All the stock coils are above the safe limits of 99%of batteries out there. The main thing will be the wattage and if you go to high it will effect the flavor/coil wearing out sooner. If your rebuilding the coils though that is a more indepth explaining as the ohms are more important as you have to build a safe build.
In short there won't be much difference between the mvp and the v3

 

[Tmg666]

As to the first question lower ohms have less resistance and will heat up faster producing vapor quicker/easier. Stock coils will all have their ohms marked on them if you want to see which resistance is best for your needs.

 

[Elyas]

I like to think of the relationship between ohms, volts, and watts using the garden hose analogy. Your volts is the amount of water going into the hose, your ohms is the thickness of your hose, and your watts is the pressure of the water (heat in our case) coming out of the hose as a result of the first two variables.

In your case, like the previous poster mentioned, you won't see any difference between the setups, but it's good to get an understanding of why.

 

[jblack741]

An MVP2 is a good choice for your Protank2 also you may want to take a look at one of the many YouTube vids out there like PBusardo who makes it easy to understand and demonstrates the differences.

 

[Dampmaskin]

I think the garden hose analogy is more accurately described like this:

Voltage is the water pressure. Higher voltage -> higher pressure.
Resistance is the narrowness of the hose. Lower resistance -> thicker hose.
Current is the speed of the water through the hose. High current -> high speed.
Power (watts) is the total amount of water coming out the business end. High power -> Much wetness.

It follows that high voltage and high resistance (a high pressure and a thin hose) can give you the same power (total output) as a lower voltage and a lower resistance (less pressure, thicker hose).

Unlike water, DC current has no turbulence, so with the same voltage, a thicker hose will give you more current. This is one aspect in which the garden hose analogy fails. In real garden hoses, water travels slower where the hose is thick and faster where it's thin. In electronics, not so much.

Anyway, it's the power that is important for the vape. Power = Voltage * Current. And Current = Voltage / Resistance.

That is Ohm's Law in a slightly soggy nutshell.

 

[GinnyTx]

Heat

sometimes when a setup is inadequate for vaping needs it gets too hot almost too hot to touch (and I've fried my nerve endings in my hands years ago working in surgery) so for me the "real" deal with that was HEAT. As in too hot to handle. which is never good.

as for MVP 2.0 and Protank2 w/air control, we just got one a couple weeks ago, what I'm finding is that fiddling with the vv and the watts, each juice has it's "sweet spot" where it tastes and vapes better.

 

[Tinkiegrrl]

Ohms means the resistance of a coil. The higher the ohms, the more power it takes to heat the coil. It also takes a bit longer to heat up when they're higher. If you have a variable volt device, the resistance is nothing but a matter of personal preference, since you can adjust the voltage or power to suit you. Many prefer lower ohms for the faster time it takes to heat. Other's prefer higher ohms, because the higher it is the larger the coil usually is. That adds surface area to the heating element, which should mean more flavor and vapor per hit.

Watts is essentially a calculation between the voltage a battery is putting out and the resistance (ohms) of a coil. Here's a handy website that explains the calculations. Ohm's Law Wheel What a variable wattage device like the MVP 2 does, is read the ohms, and adjusts the voltage itself to reach the wattage the user set it to automatically. No matter what resistance your coil is, you will get the same heat or power for each hit. It's like a variable voltage device, only it adjusts itself when you change your coil or topper, rather then you needing to adjust the voltage yourself.

With the MVP 2, you can also set it to variable voltage mode, rather then variable wattage. It'll be like driving a stick shift instead of an automatic car. Each time you change the resistance of your coil, or if switch a topper, you may need to adjust the voltage yourself to get the type of heat or hit you prefer. Many actually prefer this over variable watt mode, as it allows for more fine tuning.