oh....now i get it ....

[stealthy hunter]

I feel like an idiot ..... keep in mind I am an electronics technician by trade. I just upgraded to a innokin vtr from a joyetech ego set up. that being said just know that I understand "ohms law" and electric theory . so I was racking my brain trying to figure out how these vv/vw devices can adjust both wattage and voltage with a fixed resistance. because most of the folks at the local vape shop were saying things like " this mod can run at XX volts and XX watts" then I remembered that "ohms law" is just that a LAW meaning it cannot change. so then I figured out that it is either volts "or" watts .....DUH!!!

my main reason for posting this is for new vapers knowledge (and I guess some more experienced ones too).

you would think that someone with my knowledge would have figured that out much quicker than I did ...lol

 

[devauto]

Now that is funny!

Glad you figured it out though ... congrats on the VTR upgrade, it is pretty awesome. I like mine a LOT!

 

[Dakota Jim]

Congrats

there are a lot of people that have that same issue. I think it is because everyone says VV and VW instead of the correct VV OR VW

I spent 20 minutes trying to explain this to a vape kiosk "manager" back in September until I finally gave up (he is 22ish and is much smarter than a senile old man in his early 50's - extra scary fact is he is building subohm coils) I even had 2 bystanders trying to back me up on my explanation.

Welcome to the forum

 

[wonner]

I thought this was going to be a ProVari thread.

Oh well......still glad you got it.

 

[stealthy hunter]

I do really like the vtr, I cannot say the same for the "iclear 30s" that it came with ....had a horrid metallic taste and I am kinda glad it did as I went and picked up a "davide anyvape" and have vaped half a tank of juice and cannot say enough good about the davide it is a beast! love it...

 

[RuDawg7890]

It's not exactly "or" either... Both are actually varying the voltage. VV just directly changes the voltage based on the user's setting. VW adjusts the voltage to maintain the wattage based on the resistance of the coil used.

 

[stealthy hunter]

exactly! ...I understand how VW works ( it took me a bit but I do understand it ) ...lol

but the way some people were explaining these devices to me was that they do both , fixed voltage and fixed wattage at user specified value. which is not possible , hence my confusion ...what I was being told was in direct contradiction with my knowledge.
and who was I the "newbie" to tell these experienced vapers how this stuff works?

 

[RuDawg7890]

Sounds like you did "get it" then! Electricity is the same no matter the application, all the laws & rules apply. I actually overlooked the part where you said you're an electronics tech, so yeah, you got it!

 

[Traver]

There is a lot of expertise on this forum on every subject related to vaping. You should still take anything you read here with a large grain of salt.

 

[FearTX]

It took me a while to get it through the head of one of the "experts" at a local shop but with a piece of paper a pen and some ohm's law formulas he finally understood things.

He actually thought;

1. Ohm's law was recent and developed for vaping by vapers.
2. You could pick voltage AND wattage - Separately.
3. And at one point in the conversation that the device was malfunctioning when he was trying to prove "set voltage", "set wattage" and vape. Then I told him to look at the voltage setting again... "It changed, it's not supposed to do that... it must be defective...."

Kids these days.

 

[Outerdirkness]

The Pipe talk forum has been great.

 

[Outerdirkness]

That must have been a fun day for him...actually I am pleased he got the math.

 

[Chimney34]

Hehehe! Hello my friend! I have no background in science or anything of the sort. In fact I hated science. Thank goodness I had a sister in college for microbiology when I was in school. I remember when I got my first VV/VW PV. The guys at the vape shop were talking exactly the same way. So I took it home & guess what...no instructions of course so I posted a thread...something like 'how do I set both or do I even need too'. After doing a little more research I felt like such an idiot It's funny now though. I crack myself up just thinking about what people thought as they read it

 

[Outerdirkness]

It took me a while to get it through the head of one of the "experts" at a local shop but with a piece of paper a pen and some ohm's law formulas he finally understood things.

He actually thought;

1. Ohm's law was recent and developed for vaping by vapers.
2. You could pick voltage AND wattage - Separately.
3. And at one point in the conversation that the device was malfunctioning when he was trying to prove "set voltage", "set wattage" and vape. Then I told him to look at the voltage setting again... "It changed, it's not supposed to do that... it must be defective...."

Kids these days.

I am merely a tinkerer, I build things...currently (NPI) that thing is e-pipes so I am doing homework..I have the wood working skills, so I am verifying the electronins part. Thanks!

 

[Outerdirkness]

Thanks Chimney! Glad I am not the only one...This really IS a great community.

 

[FearTX]

That must have been a fun day for him...actually I am pleased he got the math.

I try really hard not to beat them up too bad. I happen to work with Ohm's law daily so it seems natural to me. I do get it that not everyone knows or even cares

 

[diggyb]

I don't like laws that I can't break.

 

[DasBluCig]

I try really hard not to beat them up too bad. I happen to work with Ohm's law daily so it seems natural to me. I do get it that not everyone knows or even cares

Been there.....used to TRY to do stuff "in my head"....(Broadcast Engineer for ~20 years....)...
Gave up "in my head" when I started working with antenna base currents for critical directional arrays.....!!
Thank God for calculators....(NOW!!)...Didn't have them when I started out, though.....good ol' pen and paper!!!

 

[spawnsharks]

And at one point in the conversation that the device was malfunctioning when he was trying to prove "set voltage", "set wattage" and vape. Then I told him to look at the voltage setting again... "It changed, it's not supposed to do that... it must be defective...."

Actually, not all PVs do this. Many, my iTaste MVP included, remember both settings. Set Voltage for 4.5, set wattage for 8, change heads... look at both settings, and they remain static. Switching between the two modes changes their functionality. I was seriously confused by this for the opposite reason of the kid at the kiosk... I knew that changing the wattage setting should, in theory, reset the Voltage based on the fixed resistance, and Ohm's Law. But the device simply changes modes... so it remembers the Voltage you were using while in Voltage mode, no matter what you tinker with in Wattage mode.

So, the kid may have had experience with these types of interfaces, and assumed that you set both. The fact that he is building coils scares me a little, though. I try my best not to sound condescending on the forums here when newcomers (of which I am one, no doubt) get their first atty and are looking for 'the big clouds' and clearly have limited, if any, knowledge about electricity. It's really scary. I try to inform them of the knowledge they should have before diving into these things, and hint at the dangers they risk by not understanding what it is they are doing.

Pulling a sub 1 ohm load across a battery not set up for it can have a serious meltdown that can result in runaway current, creating heat, leaking batteries or even explosions... and you're putting the device right up to your face without thinking twice.

 

[Caver]

I always cringe when they pronounce mAh as the word MAW...like it really is correct!