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condescomputer

Member For 1 Year
OK, well this is the issue. I am debating between getting a VV PWM LiPo, or triple 18650 I have some questions.

When you run PWM it pusles at the max volts of the battery, the potentiometer just adjust the speed of the pulses. This being said if I put a .17 ohm coil in a PWM at 12v it will pulse at above 40a. If I'm not mistaken that would fry the mosfet in the mod since it would be firing at ~70a. That will fry the mosfet if I'm not mistaken.

Am I correct in my thinking?
 
Constant amp limits are lower then time/pulse limits with every mosfet, transistor, led etc. Data sheet of that particular ic will show max limits.
 
also remember, time of pulses, duration of on/off time, repetitive and don't forget the temperature, and the data sheet:), and never run at the max limits.
 

MyMagicMist

Diamond Contributor
ECF Refugee
Member For 5 Years
Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment. Potentiometers operated by a mechanism can be used as position transducers, for example, in a joystick. Potentiometers are rarely used to directly control significant power (more than a watt), since the power dissipated in the potentiometer would be comparable to the power in the controlled load.

It would seem to me that one may not desiring using such resistor in vaping applications. What the article at Wikipedida suggests is these resistors being used for audio, television, computing. Considering the power dissipation, I don't see how they could be used for vaping. Will apologize and admit error if in error, just not quite seeing how these would function for vaping.
 
MyMagicMist; A transistor or mosfet uses a small voltage/currant to open the collector and emitter of the transistor to allow a larger currant to pass through it. A pot would be used to vary the pulses/duty cycle of a timer ic to turn the transistor/mosfet on and off.:)
 

MyMagicMist

Diamond Contributor
ECF Refugee
Member For 5 Years
MyMagicMist; A transistor or mosfet uses a small voltage/currant to open the collector and emitter of the transistor to allow a larger currant to pass through it. A pot would be used to vary the pulses/duty cycle of a timer ic to turn the transistor/mosfet on and off.:)

So then, it regulates the mosfet, a regulator itself?

That's what it reads like to me. To me it sounds like just more electronics crap to go wrong. Know I might seem to propagate a Luddite view in vaping. It might be that something is made as simple as can be and works that everyone tries improving how it works. Ultimately if the simple works, where is the problem?
 

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