How do I use an Ohm's law calculator?

[CanIVap3InHere]

I have gathered that four basic values are applied to the formula..

Voltage
Current
Resistance
Power

Now my Provari is telling me my carto has a resistance of 2.9 ohms. How do I figure out how many volts I should be setting it to? I have been just using trial and error on different juices, but isn't Ohm's Law meant to tell you the optimal level each category should be set to? If I am totally wrong I apologize! Thanks guys

 

[mooreted]

No, Ohm's law is the relationship each of those values has to each other. There is no correct voltage setting, it all depends on taste. I run the voltage up until it tastes slightly burnt, then back it down a bit. Some juices taste better at high voltage and some taste better at low voltage.

With Voltage and Resistance, you can determine how many watts you are putting out or how many amps you are using.

 

[CanIVap3InHere]

No, Ohm's law is the relationship each of those values has to each other. There is no correct voltage setting, it all depends on taste. I run the voltage up until it tastes slightly burnt, then back it down a bit. Some juices taste better at high voltage and some taste better at low voltage.

With Voltage and Resistance, you can determine how many watts you are putting out or how many amps you are using.

Fair enough, thank you for your response! Now how why are my watts and amps important to me as a vaper? Sorry for another question I am just lost now as to how Ohm's Law is important in the vaping community.

 

[The Ocelot]

On the fly - add "2" to whatever the resistance of the device is and if the voltage is set at the resulting number it will be ≈ 8 watts; for example: 2.0Ω + 2 = 4, and 4v x 4v /2Ω = 8w; 2.5Ω + 2 = 4.5, and 4.5v x 4.5v /2.5Ω = 8.1w - and so on.

***The charts and the math are just to give you a rough staring point*** you adjust up or down depending on what you like.

 

[The Ocelot]

Fair enough, thank you for your response! Now how why are my watts and amps important to me as a vaper? Sorry for another question I am just lost now as to how Ohm's Law is important in the vaping community.

If you are just vaping and not rebuilding or anything fancy, you don't need more than just a basic understanding of how electrical power is measured.

 

[CanIVap3InHere]

Ok makes a little more sense now, thank you Ocelot. I guess I will really have to start understanding the relationships in Ohm's law when I get into RBA's fairly soon

 

[The Ocelot]

Ok makes a little more sense now, thank you Ocelot. I guess I will really have to start understanding the relationships in Ohm's law when I get into RBA's fairly soon

Yeah, but then you'll have voltage meters and stuff. When you're just vaping, it's easy. All of the gear I use on a daily basis is in the 2.0Ω to 3.0Ω range. I usually start at 4v and dial around the first couple of times I use the new carto or whatever. Contrary to some beliefs, you can "set it and forget it" with VV, once you decide where it tastes the best.

 

[bazmonkey]

Fair enough, thank you for your response! Now how why are my watts and amps important to me as a vaper? Sorry for another question I am just lost now as to how Ohm's Law is important in the vaping community.

If you were to take the resistance of your cartos and the voltage you tend to like them at, you'll probably find with Ohm's Law that the wattage of each resistance/voltage combo you like is about the same.

Devices that let you specify a specific wattage mesaure the resistance of the carto and adjust the voltage to achieve that wattage. It's like instead of setting a microwave to cook longer or shorter based on its power you could just tell it "I want my food this hot".

For someone not using variable voltage, wattage can help a vaper guess the voltage at which a carto would work well. If you know you like _ watts in general and a carto is _._ ohms, you can assume that you'll want to use it around _ volts.

Amperage is less important. Wattage / volts = amps. Amperage is a measure of the rate power is produced, and wattage is the power produced. Batteries can only drain so quickly. If you were to use high-resistance cartos at high voltage, at some point you'd see that even though you're setting it to higher and higher voltages, it's not getting any hotter. That's because the drain is too high and the battery just can't push out a current that strong. That is when a vaper notices amerage.

 

[The Ocelot]

If you were to take the resistance of your cartos and the voltage you tend to like them at, you'll probably find with Ohm's Law that the wattage of each resistance/voltage combo you like is about the same.

Devices that let you specify a specific wattage mesaure the resistance of the carto and adjust the voltage to achieve that wattage. It's like instead of setting a microwave to cook longer or shorter based on its power you could just tell it "I want my food this hot".

For someone not using variable voltage, wattage can help a vaper guess the voltage at which a carto would work well. If you know you like _ watts in general and a carto is _._ ohms, you can assume that you'll want to use it around _ volts.

Amperage is less important. Wattage / volts = amps. Amperage is a measure of the rate power is produced, and wattage is the power produced. Batteries can only drain so quickly. If you were to use high-resistance cartos at high voltage, at some point you'd see that even though you're setting it to higher and higher voltages, it's not getting any hotter. That's because the drain is too high and the battery just can't push out a current that strong. That is when a vaper notices amerage.

Unless you are using a ProThingy:

(These formulae are for entertainment purposes only. Don't try this at home.)

 

[bazmonkey]

You know what's sad? I sat here for about two minutes looking at the formulae and admiring the novel presentation...

...Then I noticed it says ProVari in the middle. Seriously, I was trying to figure out what the "ro" meant.

 

[The Ocelot]

I have way too much fun amusing myself

 

[Katya]

Ohm's Law as it pertains to vaping is really not that complicated--and it's very useful when you want to know what you're doing.

Voltage and wattage are often misunderstood by new vapers. It all boils down to wattage (heat, power) that your PV generates. Wattage = Voltage (of your battery) squared divided by Resistance (Ω) of your atomizer. If you're not good at math, don't worry, use this easy calculator:

Online Conversion - Ohm's Law Calculator

The wattage you want, especially at the beginning of your vaping career, should be somewhere between 4.5 and 8.5 Watts. Anything lower than 4.5 watts may not vaporize your juice properly and will not produce enough warmth and vapor. Anything above 8.5 watts increases the risk of burning the filler in your cartos (if you're using them) and even some juices, especially the delicate ones.

Tobaccos, chocolate and coffees require more wattage (heat), while fruit and other delicate flavors do better with less heat.

If you want to know more, this is a good read:

http://www.e-cigarette-forum.com/fo...-stuff-i-double-dog-dare-you.html#post9112897

Experiment and you'll find your own sweet spot in no time!

 

[Katya]

Sorry, double post...

 

[zapped]

You dont need a calculator to figure that out.

If youre carto is 2.9 ohms then add 2 to it to get the voltage.

So 2.9ohms + 2 equals 4.9 volts.

Its a simple matter of either raising or lowering the voltage in .1 volt increments until you find your sweet spot from there. Too low and you'll notice flavor and vapor falls off...too high and your juice will start to taste burnt....go higher than that and youll either exceed the limits of the device or burn the atty/carto/clearo

These numbers are based off a poll that was done a few years ago that put the average vapers sweet spot at 8 watts or so.

This simple equation is why many of us that use VV say Wattage isnt needed to start with....vape to taste instead of off a chart.

 

[Katya]

My sweet spot changes from 5 watts to 8.5 watts depending on the device I'm using, the juice I'm vaping, and my mood, zapped.

Not to mention the fact that many, many vapers use set-voltage batteries. So let's say, using your calculations, somebody using a 3.2-3.3v eGo battery should use a 1.2-1.3Ω atomizer? But that would most certainly kill his or her battery in no time flat. The "add two and then adjust to your liking" method is not only inaccurate but may even be dangerous, particularly with eGo-class batteries.

The Ohm's Law Calculator is a good thing. And it really isn't that hard.

 

[SissySpike]

Its really just setting your mod according to taste. Weather its wattage or voltage setting or a simple 1 to 10 generic setting Or some of the old mods have a potentiometer to adjust with no display.
Start low and work your way up till you like it. Since its according to taste which has no formula its really not necessary but its fun to impress new vapors with your vast knowledge of fancy stuff like ohms law, but it really has very little to do with whether you will enjoy your vape.

 

[mooreted]

The thing about variable wattage is that it automatically adjusts the voltage based on the resistance of the accessory you plug into your device. For instance: I can set my Zmax to 8 watts and use my 1.5 ohm 306 atty, then switch to a 3 ohm carto, then put my 2.4 ohm Protank on and never have to adjust anything. I will always get 8 watts and the voltage will change automatically.

 

[Butters78]

I like variable wattage but the whole deal about changing your juice delivery device and having the same experience isn't totally true. 8 watts on a carto tank is sometimes a lot different than 8 watts on a clearo.

 

[mooreted]

Yeah, you still have to adjust things, but it works pretty well most of the time. Some accessories perform better than others so you can never get truly "set it and forget it".


Sent from my easy chair using brain waves.

 

[tj99959]

Fair enough, thank you for your response! Now how why are my watts and amps important to me as a vaper? Sorry for another question I am just lost now as to how Ohm's Law is important in the vaping community.

Watts is the end result (your sweet spot) of all that ohms law stuff. Once you know what your sweet spot is (wattage) the calculator becomes pretty handy. Say for example you like to vape at about 7.5 watts, and your atty/carto measure 2.9 ohms. Just punch those two figures into the calculator and it will tell you to set your voltage to 4.6 volts.

Your Provari has a 3.5 amp limit built into the chip. Since the calculator shows that you would be at 1.6 amps, you know that you are good to go.