Volts versus watts. Watts the difference.

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Aesop

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Amps = Volts/ohms -- This is the current that is sent through the circuit. It's the amount of volts divided by the resistance of the circuit.

Watts = Volts * Amps -- This is the power that is sent through the circuit. This is the goal to heating the resistance wire

Watts = Volts * Volts/ohms -- by substitution this is what your SVD looks at

When you use variable voltage (VV) you set the volts in the equation above regardless of the resistance on your coil.

When you use variable wattage (VW) you set the watts you want and the circuitry will adjust the volts to match the resistance on your coil.

It really comes down to preference on which is better. Theoretically, VW will give you a more consistent vape and VV will give you more control.

Hope that helps.
 

CloudPusher

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Amps = Volts/ohms -- This is the current that is sent through the circuit. It's the amount of volts divided by the resistance of the circuit.

Watts = Volts * Amps -- This is the power that is sent through the circuit. This is the goal to heating the resistance wire

Watts = Volts * Volts/ohms -- by substitution this is what your SVD looks at

When you use variable voltage (VV) you set the volts in the equation above regardless of the resistance on your coil.

When you use variable wattage (VW) you set the watts you want and the circuitry will adjust the volts to match the resistance on your coil.

It really comes down to preference on which is better. Theoretically, VW will give you a more consistent vape and VV will give you more control.

Hope that helps.

Yup. VW is like an automatic car, and VV is a manual. All a matter of preference really. I like VW mostly.
 

69CamaroSS

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Well that's the technical version :). I'm currently using 8.5v and 4.5w, any thought on this.

I think you have your numbers reversed. 8.5V could only be achieveable by stacking batteries in a MOD (which is possible) and would absolutely fry pretty much any juice you tried to vape that high unless your running a REALLY high resistance coil(s). 8.5W is a really good setting and right in my "butter zone" for most coils and juices.
To answer your original question, just use watts and let your SVD do the adjusting when/if you switch tanks or clearos that have different resistances. Otherwise you'll be constantly having to adjust the Volts and possible getting the occasional horrid burnt hit. :)
If you wish to use the volts setting, familiarize yourself with and bookmark this
http://25.media.tumblr.com/tumblr_m9dkanCt0I1qc8949o2_1280.png
 
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EBates

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VV = voltage is applied to your coil is held at that level you define regardless of the coil resistance.
VW = voltage is applied based on your coil resistance and the wattage setting you define.

VW works like your car's cruise control you set the 'speed' you want and it sets the rest.
VV works like your car with no cruse control your 'speed' is set by you.

I personally, use the cruise control in my car and wattage setting on my vape.
 

Virtual Life

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Sounds like OP may be thinking that one sets both volts and watts. Same mistake I made on the first day with my SVD, it can only be set to one or the other not both. And 69CamaroSS is right, 8.5 volts would fry almost anything on the market.

Edit: the SVD is not capable of 8.5 volts anyway.
 
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69CamaroSS

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tumblr_m9dkanCt0I1qc8949o2_1280.png

If you look at this carefully, you'll notice that the "around" 8- 8.5W is the higher end of the suggested power setting for most juices using stock coils. Everything changes when you wrap your own coils and uses different wicking materials and delivery devices (different air flows etc). Again, using stock (bought) clears and cartos, Watts is the simpler fill, set and vape setting that most use. Sure, you can use volts. Just refer too that chart or you'll likely be wondering why you keep scorching your throat and juices for a while while you aimlessly guess at the settings.
 

twgbonehead

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Just changed tank and juice and still getting over strong hit with volts down to 3 which is as low as it goes. So would dropping the watts help a bit now?

David,

The SVD operates in EITHER voltage mode or wattage mode. It doesn't (and can't) do both at the same time!

If you switch to adjusting the voltage, it is in voltage mode. When you switch to adjusting the watts, it's in wattage mode. In either mode, the other setting is completely ignored.

I keep my MVP in wattage mode (and mostly run it at the lower end.....)
 
I run wattage as well. But I do adjust it up and down. Coils below 1.8ohm in Evods vape better at around 7.5w and above at 8-8.5w. I use mostly clearos with stock coils. Evods work best between 3.8 and 4 volt depending on juice. Its what they were designed for. I find the new Evod Glass can be pushed more and even benefits from it. But playing with Watt is so much easier. No calculating and basically just set and forget.

Sent from my Nexus 5 using Tapatalk
 

zapped

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An easy equation to remember when using VV devices is this:

Take the resistance of the carto/atomizer/clearomizer and add 2. From there adjust up or down in increments of .01 if your device is capable of fine tuning. Theres no need for complicated charts or math as this will get the majority of users pretty close to their sweet spot of around 8 watts.

2ohm atty + 2 = 4 volts.

3ohm + 2 = 5 volts
 

Davantrac

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Thanks I've learned something. That's basically whichever you use last is your setting, watts or volts. I was under the impression one setting chose which gear you are and the was the throttle, to put it simply.
Everything I use is stock innokin and bought juice.
conclusion for now, what I have done is set the w down to 4 but this is over rode because I the set the v down to 4.
 
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69CamaroSS

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Just changed tank and juice and still getting over strong hit with volts down to 3 which is as low as it goes. So would dropping the watts help a bit now?

1. Set it to WATTS.
2. Start low (maybe in the 4-6 range).
3. Slowly work your way up until taste gets bad. Be sure to allow time between vapes for wicks to refill.
4. Once you find the Watt setting that's too high and tastes bad, drop you setting 1 full Watt.
5. Vape On! :vapor:
 

69CamaroSS

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Thanks I've learned something. That's basically whichever you use last is your setting, watts or volts. I was under the impression one setting chose which gear you are and the was the throttle, to put it simply.
Everything I use is stock innokin and bought juice.

VW= You pick the watts and the resistance (according to the atomizer you chose) and it will select the correct voltage to input to achieve the watts you're asking for
 
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