Volts is only part of the equation. It means nothing if you don't fill in one of the other variables: current (amps) or resistance (ohms). Power (watts) = Volts x Volts / resistance OR current x current x resistance.
Here is an example:
On my mechanical mod I have a coil of 1.2 ohm. Taking voltage drop out of the equation for simplicity sake my battery is delivering 4.0 volts. I don't know the amps I am drawing without doing a quick calculation. Since I know 2 of the 3 variables (volts, resistance) I can calculate for the third (current).
Volts (V): 4.0v
Resistance (R): 1.2 ohms
Current (I): unknown
To calculate the missing variable you use ohms law formula depending on what variable you are missing.
1. If you are missing current then use I=V/R (amps = volts ÷ ohms) Note: VERY useful calculation in vaping
2. If you are missing resistance then use R = V/I (ohms = volts ÷ amps) Note: not as useful in vaping
3. If you are missing volts then use V = IR (volts = ohms x amps) Note: not as useful in vaping
So in my example above to find out how many amps I am drawing from my battery on my mechanical with a 1.2 ohm coil and a fresh battery delivering 4.0 volts I would do this:
4.0 volts ÷ 1.2 ohm = 3.33 amps. I now know my 30amp sony is barely breaking a sweat
Now what if I want to know how many watts this is? Watts are very useful as it is essentially the culmination of power taking everything into account. It is the best number to use when comparing vaping power output as it includes in itself coil resistance and volts). For example in a previous post the author said (I am paraphrasing)
"when I vape at 4.2 volts everything tastes burnt" . This statement means nothing in and of itself. It begs for the follow up question "what resistance is your coil" because a coil with a resistance of 0.5ohm has a much higher power output than one at 2.5 ohm.
Wattage is useful when discussing these issues as it includes in it I, V and R. So let me show you how to calculate it. You don't need to know what your current draw (amps) is to calculate Power (watts), but it's so easy and valuable you should do it.
P = VV/R (volts x volts ÷ resistance) or
P = IIR ( current x current x resistance)
To calculate power (watts) for my previous example I would do this:
4.0 (volts) x 4.0 (volts) ÷ 1.2 (resistance) = 13.33 (watts) OR
3.33 (amps) x 3.33 (amps) x 1.2 (resistance) = 13.31 (watts) - the difference between the calculations is rounding - in reality they are equal.
So vaping this atomizer on my mechanical with the battery at 4.0 volts currently, using my provari at 4.0 volts or a hana modz v3 set to 13 watts will give the same vape.
This is the simplest and first step into the world of understanding electronic devices. If you want to learn a lot check out these free courses in electronics. I used these courses to teach myself how to repair vintage hi-fi audio equipment where an understanding of ohms low is the first baby step.
NEETS - Navy Electricity and Electronics Training Series
Start with module one. You will thank me!
PS. I typed this up on my tablet so kf you see any errors let me know. Where is a desktop when you need one
Regards,
Brad