what does ohms even mean??...

[Kasmel]

like besides it is resistance... and you can put in more power with out getting the burnt taste... does it give it better taste??... more vapor what??... also what is sub ohming it??... sorry if this is posted somewhere else still new and trying to learn the site... thanks guys!

 

[montara]

I know more will chime in here on how it relates to producing vapor, but it's just a measurement in the laws of electricity.
Ohm's law calculation calculator calculate power formulas mathematical ohm's law pie chart electric voltage electric current resistance formula emf magic triangle equation tip online voltage volts resitor resistance amps amperes audio engineering E V

 

[Baditude]

Ohm is the resistance rating of a wire coil. The lower the number, the less resistance to the flow of electrons through the coil and the hotter the coil will become. The higher the number, the more resistance to the flow of electrons through the coil and the coil will not become as hot.

Some people prefer a warmer vapor, some prefer a cooler vapor. Lower ohm factory-made coils will use slightly more energy from a battery, higher ohms less energy. Higher ohm coils will have a wider range of voltage that can be used than a lower resistance coil will.

Sub-ohm coils in an RBA take the above to the extreme, as the lower you go in ohm, the amperage required from the battery increases exponentally.

• 1 ohm coil will draw 4.2 amps from the battery,
• o.6 ohm coil will draw 7 amps
• o.4 ohm coil will draw 10.5 amps
• o.2 ohm coil will draw 21 amps
• 0.1 ohm coil will draw 42 amps

The typical protected ICR 18650 battery has a 2.6 amp limit.
The typical IMR 18650 battery has a 10 amp limit.
The typical high amp hybrid 18650 battery has a 30 amp limit.

So...never build/use a coil which will draw more amps than you battery has, or bad things happen.

Ohm's Law for Dummies

Using Ohm's Law, running a device at 4.2v with a 1.8 ohm coil will draw 2.3 amps from the battery. This is safely below the 2.65 amp rating of the average 2600 mAh protected ICR 18650 battery. However, using a homemade 1.0 ohm coil at 4.2v on a RBA will draw 4.2 amps which is way over that battery's rating and would not be safe to use.

Always use a high drain IMR battery over a protected ICR battery.

 

[soulcatcher]

-----> What he said----^
Volts^2 / ohms = watts.

Watts can be thought of as the overall work being done. You can achieve the same wattage by passing less volts to a lower resistance coil for by passing more volts to a higher resistance coil and basically achieve the same vape. Now sub ohm vaping with a mechanical mod allows one to run a lower res coil thus achieving much more watts (30 watts is easy to get with a .5 ohm coil).

Most regulated mods have a min. coil resistance lvl. too low and it won't fire. On a mech mod you can build coils as low ohms as you want ***as long as your battery can SAFELY power it*** Batteries are typically 3.7volt (4.2v freshly charged) so the voltage going to the coil is whatever the charge is on the battery. At lower ohms the coil will draw more amps from the battery. This is where it can be dangerous. If you are drawing more amps from the battery than it can handle, then the batt can overheat and possibly go into a thermal runaway venting hot gases. You can use an ohms calc to see how diff res coils will result in different amp draws and diff watts.----> Ohm's law | Steam Engine | free vaping calculators

Do your homework before getting into sub-ohming. Lots of good info and good people around here that will help you out.

-Best of Luck-

 

[epicdoom]

+1^^ cant argue with that a bit

 

[Iwire]

I can't believe it Those are some excellent explanations ! Nobody said ohm is the opposite of mho

 

[Susan~S]

Excellent explanation of ohm's law Baditude!! I'm going to incorporate into my list of links from you I often give to others when they are looking for help. Your "Ohm's Law for Dummies" is a great visual learning tool. What you just wrote above is a GREAT analytical learning tool The two together -- superb!! Thank you!

 

[Fir3b1rd]

Think of your apv as a circuit and your topper is obviously what you are powering.
Your power source is you battery and your button is what opens or closes the circuit allowing the current to flow through.

Voltage is NOT power despite common belief. Voltage is basically a measurement of pressure.

Electricity (ac or dc) is the excitement of elections being released from atoms and trying to get to another atom in order to stabilize the atoms- this the purpose for the closed circuit.
The "coil" is merely a resistor: and, just like the name implies it resists the flow of those electrons; thereby causing the pressure (voltage) if you will. That resistance is measured in a unit called ohms. When the flow of those electrons is being resisted it causes the coil to heat.
Think of electricity and the flow of electrons in a basic circuit as water flowing through a hose. When you pinch true house less water flows through but it appears to flow faster. Pinching the hose is like applying a resistor to the flow.
The water itself is the current(amps)
The resistance applies is the resistance of you pinching the hose (ohms)
And the pressure building up if the water at the pinched off portion is the voltage (Volts)
The power being used is the wattage
Some cool formulas if you wanna nerd out-
Volts = Current X resistance
V=I(R)
Wattage = Volts squared divided by R
P=Vsq/R
In case you are into dual coil you can get total resistance this way -
Rt=(R1*R2)/(R1+R2)

There's more to it than that but hopefully that little bit helps.

 

[Kasmel]

thanks guys!! very helpful!!

 

[Voodoochile]

 

[steved5600]

Here is the best explanation I have ever seen.

 

[Fir3b1rd]

View attachment 342907Here is the best explanation I have ever seen.

Now that just funny!

 

[brianwert93]

ohms is pretty much how the flow of electrons moves through a wire.

 

[Bernard Marx]

Ohms-Shmoms - Big Deal!