How extreme can you take it? Anyone ever go over 7-8 volts. Seriously im curious to know just how high you can go (safely). Thinking of building a tube mod that will take 4-5 18650s. I don't want to build anything that wont work or will be to dangerous so someone chime in here. How extreme can you go??
all related to OHM's law
Depends on the WATTS (aka power) you are hunting for
If you had a coil with 10Ω's you could kick the volts way up and still get the result you are looking for by using a standard 3.7vdc battery and trying to go sub ohm (that's what sub ohmers are going for...more POWER with limited/restricted voltage capabilities)
Lets do the math
say you want to go 7 Watts right out of your cig lighter
13.8vdc out of your vehicle, 7 watts, you need to push .507 amps...to get .507amps with 13.8vdc you would need a coil of 27.2Ω
Ohm's Law Calculator
Say you wanted 20 watts
9.5Ω
It's OHM's "LAW" not OHM's "SUGGESTION"
4-5 18650's in series or parallel, parallel you would get battery output voltage x the combined total of the mAh of the batteries, in series, you add the voltages...8 batteries at 3.7-4.2vdc = 30.16-33.6
Calculate what watts you are looking for and it will tell you the resistance you need to be at
Go look at an electric kitchen range..same principle just MUCH MUCH BIGGER...220vdc, HUGE COIL at high resistance = red hot coils...they push several hundred watts....only problem is...it takes a LONG time to heat up all that metal, 32gauge wire heats and cools REALLY quick