Is a PWM a VW?

[Batdragon (AKA Batty)]

I have been looking through the different types of VV mods, and then started looking at the VW mods. My thought is that it is very simple to build a PWM device, so would this be classed as a VW controller?

I do have a second question about the voltages that are being used, where they go up to 7v. I take it that they are using batteries in series for those rather than using a voltage boost from a standard 3.7 battery?

Thanks for your help on this one

[warlordxxx - (Mark)]

Honestly PWM mods can be great or an absolute disaster (see the v-max reviews) it all seems to depend on the spike that the device modulates to in the case of the v-max it hits about an 8-9v spike when device is set to 3.2v ..

I'm not sure myself if this would be classed as a wattage controller , a voltage controller or both depending on setup maybe ?

As for it being 7v i would imagine in most if not all cases that would be 2 batteries in series although there is a step-up PWM i don't know if it would be efficient or even output enough from a single battery to hit the 7v range

[Anne (fuzzy)]

What is this foreign language ??? Lol

Sent from the mad house

[Queenie Bee]

Lol fuzzy not the first time bats has had me confuseled lol

[warlordxxx - (Mark)]

Ladies a PWM is a pulse width module - for want of a better way of explaining it - it pulses current through and averages out to give the effect of voltage required - VV is variable voltage as i'm sure you all know and VW is variable wattage like the kick or Darwin

The main advantage over other methods is the least amount of power drop under load

[Batdragon (AKA Batty)]

Thanks Queenie, I'll remember that lol

For those that are reading this and wondering what the heck we are talking about let me put some light on it for you

VV = Variable Voltage - This is where the voltage is user adjustable to suit their particular atties and vape hit.

VW = Variable Wattage - This is where the power going to the atty is limited or boosted by means of altering the voltage and or current. giving more control to the user of the heat produced by the atty.

PWM = Pulse Width Modulation - This is a form of power control. It is very similar to the light switch dimmers where what it does is to turn on and off the supply in a pulse. It is also known as a mark space ratio for a square wave generator. (ok I will explain further as to what I have just said lol)

If you have a switch that turns on an old style light bulb when you turn it off there is a cooling down period of the bulb where though there is no power going to it there is still light coming from it. same as when you turn it on there is a warm up period. (Picture two slides back to back where it warms up (going up one slide) and cools down (going down the other side))

Now if you turn on and off that switch quickly enough the light element will not heat up fully or cool down fully, in essance producing a dimer light. (With me so far?)

What you are doing is limiting the supply of power to the bulb by the amount of time the switch is in the off possition.

on - on - on - on - on - on = 100%
on - off - on - off - on - off = 50%

So if you are pumping out 7v when on using the on/off method you are supplying the equivelant of 3.5v over the same time period (does that make sense?)

Next is the mark space ratio, which is basically the time difference between being on and off. "mark" means on, "space" means off.

on - on - on - off - on - on - on - off = 75%

The switching on an off is all done very quickly through electronics, so fast that it can not be seen that it switches off, but only measured. the visible output is that the element of the atty will be less hot the more "spaces" there are in the feed to it.

I hope I have not insulted anyone in putting it in this way, and that it helps to understand what we are talking about.

I would also like to point out that there are many other factors that need to be taken into consideration with this (like spikes of voltage) that I have not said about as I was just trying to describe it simply



Or more simply put "What Mark said" lol

[warlordxxx - (Mark)]

May 26, 2012 15:04:15 GMT Batdragon (AKA Batty) said:

Thanks Queenie, I'll remember that lol

For those that are reading this and wondering what the heck we are talking about let me put some light on it for you

VV = Variable Voltage - This is where the voltage is user adjustable to suit their particular atties and vape hit.

VW = Variable Wattage - This is where the power going to the atty is limited or boosted by means of altering the voltage and or current. giving more control to the user of the heat produced by the atty.

PWM = Pulse Width Modulation - This is a form of power control. It is very similar to the light switch dimmers where what it does is to turn on and off the supply in a pulse. It is also known as a mark space ratio for a square wave generator. (ok I will explain further as to what I have just said lol)

If you have a switch that turns on an old style light bulb when you turn it off there is a cooling down period of the bulb where though there is no power going to it there is still light coming from it. same as when you turn it on there is a warm up period. (Picture two slides back to back where it warms up (going up one slide) and cools down (going down the other side))

Now if you turn on and off that switch quickly enough the light element will not heat up fully or cool down fully, in essance producing a dimer light. (With me so far?)

What you are doing is limiting the supply of power to the bulb by the amount of time the switch is in the off possition.

on - on - on - on - on - on = 100%
on - off - on - off - on - off = 50%

So if you are pumping out 7v when on using the on/off method you are supplying the equivelant of 3.5v over the same time period (does that make sense?)

Next is the mark space ratio, which is basically the time difference between being on and off. "mark" means on, "space" means off.

on - on - on - off - on - on - on - off = 75%

The switching on an off is all done very quickly through electronics, so fast that it can not be seen that it switches off, but only measured. the visible output is that the element of the atty will be less hot the more "spaces" there are in the feed to it.

I hope I have not insulted anyone in putting it in this way, and that it helps to understand what we are talking about.

I would also like to point out that there are many other factors that need to be taken into consideration with this (like spikes of voltage) that I have not said about as I was just trying to describe it simply



Or more simply put "What Mark said" lol

Yeah yours was much more thorough but i wasn't going to type all that out lol

[Batdragon (AKA Batty)]

The have a saying in work for when that happens and I just blurt things out, it is called a Brain Fart lol

[warlordxxx - (Mark)]

May 26, 2012 15:31:46 GMT Batdragon (AKA Batty) said:

The have a saying in work for when that happens and I just blurt things out, it is called a Brain Fart lol

Know that feeling i have them all the time lol

[Queenie Bee]

I am the other way I have brain cloud lol