smoothest regulated mod
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Can someone help with me our with pwm ? Is this the drop off you get while your battery lowers towards the end or does this mean more of a constant power while the button is depressed ? Or neither - just no yelling please
PWM is pulse width modulation, it has nothing to do with the drop off or voltage lag your battery experiences towards the end of the discharge cycle.
All devices use PWM of some sort. With PWM the device fires the battery at the highest available voltage from the boost circuitry. If a lower voltage is selected, then the battery turns off for a certain time. So If I set the device to 3.0 volts, then the device will fire 6.0 volts for roughly half the time then not fire for half the time equating to an average 3.0 volts. The math is not correct here, but simply for you to get the picture. This time that the device is on is called a "duty cycle"
On some cheaper devices, this duty cycle occurs 33 times per second or 33Hz and is visible on an O-Scope. You also can hear it firing on your coil. According to some, you can "feel it" in the vape. The size of the components necessary to filter this signal back to a straight DC signal are unreasonable, so the manufacturers do not even try.
A ProVari does this 800 times per second or 800 hz. So fast that it is easy to filter back into a straight DC signal using smaller components.
A mechanical mod does not have any regulation so it is the smoothest available as it is a straight DC signal.
The voltage lag you sense as the battery discharge or the ability to give constant power to the device is a direct function of the quality of the boost circuit itself and the battery powering it. A lower capacity battery can not keep up with the current draw necessary and usually will begin to lag. A higher capacity battery is less subject to that. A poor performing boost circuit can also cause voltage lag.
The ProVari is a great device that combines both really fast PWM and a highly accurate boost circuit. The price is pretty reasonable too, compared to higher priced mods.
The MVP, IMHO is the better bang for your buck, however. It provides very fast PWM so it's output is filtered back to straight DC and it has a high capacity battery, it's boost circuit is not as accurate as the price of a Provari, but it is 1/3 to 1/4 the cost of a ProVari. It doesn't require additional batteries, but must be thrown away when the installed batteries fail to keep a charge at the end of their usable life.
If you are looking ONLY at smoothness and accuracy, I think the ProVari is the best compromise. If you don't have the budget for a ProVari, than the MVP2 wins hands down.
Another contender seems to be the Protovapor XPV. It looks like it could give the ProVari a run for it's money, especially amongst the VW crowd. I am seriously looking at this as my primary vape.
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Funny, I paid less than $200 (shipped) for each of mine (yes, brand new, from the manufacturer).
Uh.. No.. Even the cheapest oscilloscope has no problem seeing an 800 Hz signal. The reality is a higher-frequency signal is easy enough to filter back to real DC, whereas a low-frequency would take much larger components to filter back to DC, so they don't even try.
Thanks so much p.opus - you went above and beyond - much appreciated !! (Thank you too slipdiskk). I actually just own a reo mech and a reo vv i recently bought an mvp just based on some of the features and price, having no idea of pwm. but using only reo mech for the lat 3 years i had no idea what tanks or accessories to buy with the dang mvp and my friend was willing to trade a reo grande for the mvp so i couldnt pass up that deal! So i traded him for a back up reo. But i think i gonna buy another mvp (provari i think out of budget right now). I need an ohm reader for the coils im building really bad - those cost 20-25 - how can ya go wrong with an mvp (with built in ohm reader) along with it functioning as battery back up . - sorry too much info about me --- but i really appreciate the explanation on pwm- that was really excellent! . Apologies to original poster for asking but i really wanted to know
Man i was a chemistry major in college - it seems like everyone on here is an electrical engineer or a physicists - sheesh !
Man i was a chemistry major in college - it seems like everyone on here is an electrical engineer or a physicists - sheesh !
Thanks for the clarification Rossum. I was making a bit of an assumption there...Thank's for clearing it up. Higher hz, means easier to filter back into a flat signal using smaller components........Got it!!!!!
It's personal preference (or lack of consistent building skills in my case) in how you build the KF.
My latest build is poor on vapour but uses much less juice. My last one had great taste and vapour but chewed through the juice.
Now I just need to get good enough at rebuilding to have some control over which I get.
I have had a lot of fun, some frustration, and some sweet vaping. It has been a great journey.
I currently pay the high juice price, but enjoy phenomenal flavor and excellent vapor with my vertical coil builds. Have fun with it Ref!
Roaring via Tapatalk
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