Kayfun problem that needs help
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I've been looking at that R = E ÷ I. The battery starts out at 4.2 volts but as I use it, it goes down to about 3.6 volts when I recharge it. Does the resistance number change as the battery drops down in voltage?
No, the resistance would remain constant the amperage would lower. Perhaps this would help I = E/R also. Here's one of the many online calculators that might help.
Ohms Law Calculator
Ohms Law Calculator
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Correct. Resistance is constant, meaning it doesn't change. Well, it can a little as the coil gets gunky.
Watch what happens with current draw as the battery drains:
I = E ÷ R
Let's say we are using a 1 ohm coil because its easy to calculate.
I = 4.2v ÷ 1 ohm = 4.2A
I = 4.0v ÷ 1 ohm= 4.0A
I = 3.8v ÷ 1 ohm = 3.8A
As the battery's voltage drops so does the current draw. So I always check my current draw with a full (4.2v) battery as that will be the maximum.
Watch what happens with current draw as the battery drains:
I = E ÷ R
Let's say we are using a 1 ohm coil because its easy to calculate.
I = 4.2v ÷ 1 ohm = 4.2A
I = 4.0v ÷ 1 ohm= 4.0A
I = 3.8v ÷ 1 ohm = 3.8A
As the battery's voltage drops so does the current draw. So I always check my current draw with a full (4.2v) battery as that will be the maximum.
Easy Ohm's Law calculations.
Use your finger to cover which one you want to calculate. So if you want to calculate E (voltage) cover the E and you will see I and R next to each other. That means you multiply them. E = I × R.
If you want to calculate current (I) cover the I and you see E over R. That means you divide them with E going into the calculator first because its on top. So I = E ÷ R.
Use your finger to cover which one you want to calculate. So if you want to calculate E (voltage) cover the E and you will see I and R next to each other. That means you multiply them. E = I × R.
If you want to calculate current (I) cover the I and you see E over R. That means you divide them with E going into the calculator first because its on top. So I = E ÷ R.
That is a very cool chart! And one I can remember. I think you should write a short article explaining in elementary terms what a newbie to rebuilding coils need to know about batteries and coils for safety reasons. I read once that genius is being able to make the complex simple. And I think you could do that, just from what you've posted on this thread so far. You could also add it as your own Blog but I'll like to see a Sticky thread made out of it. You are an educator after all. Still.
Thank you for sharing your valuable knowledge!
Thank you for sharing your valuable knowledge!
Thank you
We'll see about that. I hope they do. You can make it any way you want, fun and interesting too, besides all the boring stuff. Thank you for at least giving this some serious consideration.
(If it's very different from what they already have, then it'll be a hit. I don't mean to diminish what they've already posted because their intentions are certainly good and I'm sure many have benefited from the various threads given on that one page.) Hurry up. I need it. haha
It won't be today or tomorrow 
I have to take care of my animal crew and make dinner yet. And I got two new attys that I would like to build tomorrow.
I have to take care of my animal crew and make dinner yet. And I got two new attys that I would like to build tomorrow.
If you're taking care of your animals then that's a good enough excuse for me. So what attys are you building tomorrow and tell us the details, how you're building the coils and what are you vaping them on and what ejuice, etc?
Flash e vapor clones, a v3 and a vs. Not sure of my builds yet, but will be for a mech as I'm out of regulated mods to put them on.
Juice will be NT Strawnilla and CLS because those two aren't in anything else at the moment.
Juice will be NT Strawnilla and CLS because those two aren't in anything else at the moment.
If you're out of regulated mods I would suggest a Cloupor Mini. It's wonderful! $28, tiny, 18650, and who needs more than 30 watts?
I'm trying not to buy any more mods . Not for awhile. I do have two mechs not in use at the moment so they will be wearing the Flash e's.
Sometimes I vape over 30W, but most things can be built for a 30W limit.
. Not for awhile. I do have two mechs not in use at the moment so they will be wearing the Flash e's.Sometimes I vape over 30W, but most things can be built for a 30W limit.
I don't know what's happening with this thread but it sure doesn't seem to want to take my posts. I wrote one a couple hours ago and now it's not here. Did I fail to push the submit button. If so, that's weird.
Anyway, I went to my local shop today and the nice fellow built my Kayfun for me. And yes, the problem was bad O-rings. Now it's just vaping beautifully! With some new Pina Colada ejuice. I'm really happy about this because I really like these Kayfun's. The fellow told me to take a good O-ring to the hardware store down the street and just match it up with O-rings there and buy a box. Sounds good to me.
I want to thank everyone here who tried to help me. I really appreciate your time and effort! And most if not all of you were right about it being an O-ring problem. Anyhoo...big thanks again to everyone here!
Anyway, I went to my local shop today and the nice fellow built my Kayfun for me. And yes, the problem was bad O-rings. Now it's just vaping beautifully! With some new Pina Colada ejuice.
I'm really happy about this because I really like these Kayfun's. The fellow told me to take a good O-ring to the hardware store down the street and just match it up with O-rings there and buy a box. Sounds good to me.I want to thank everyone here who tried to help me. I really appreciate your time and effort! And most if not all of you were right about it being an O-ring problem. Anyhoo...big thanks again to everyone here!
I've been online shopping for a new iStick and have decided that I like the 50W model. It has two parallel batteries for 4400mah current capacity and the electronics are supposed to be accurate compared to the 15w original iStick (which I own). I'll never vape at anything close to 50W, but I like the long battery life you get from dual 2200mah 18650s.
I switch back and forth from my Provari to the 15W iStick, and sometimes I vape my Sigelei Zmax V3 for a change. When I know I will be away from the house for a few hours I charge up the iStick. That keeps me from having to carry a battery box. I can use the USB charge port in my pickup for the iStick. With the 50W model I can count on it lasting all day.
I switch back and forth from my Provari to the 15W iStick, and sometimes I vape my Sigelei Zmax V3 for a change. When I know I will be away from the house for a few hours I charge up the iStick. That keeps me from having to carry a battery box. I can use the USB charge port in my pickup for the iStick. With the 50W model I can count on it lasting all day.
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Dave, I think the 30W istick only has one battery. The 50W has two. And yes, the battery life is worth it even if you don't need 50W.
I don't know what's happening with this thread but it sure doesn't seem to want to take my posts. I wrote one a couple hours ago and now it's not here. Did I fail to push the submit button. If so, that's weird.
Anyway, I went to my local shop today and the nice fellow built my Kayfun for me. And yes, the problem was bad O-rings. Now it's just vaping beautifully! With some new Pina Colada ejuice.
I want to thank everyone here who tried to help me. I really appreciate your time and effort! And most if not all of you were right about it being an O-ring problem. Anyhoo...big thanks again to everyone here!
Good to hear.
The trouble with the kayfuns (not the new v4) is the top of the chimney on the right in the pic above; it has to seal at the top.
One way to figure out if that seal is sealed at the top is to fill the tank with water, turn it upside down, and see if all the liquid drains out.
Easy Ohm's Law calculations.
Use your finger to cover which one you want to calculate. So if you want to calculate E (voltage) cover the E and you will see I and R next to each other. That means you multiply them. E = I × R.
If you want to calculate current (I) cover the I and you see E over R. That means you divide them with E going into the calculator first because its on top. So I = E ÷ R.
Once you've advanced past E=I*R, you can move on to understanding how it relates to power: P=(V^2)/R = (I^2)*R.
This power wheel cheat sheet will help you understand what your regulated is automatically doing for you, or determine if it's doing what it's supposed to do.
Once you've advanced past E=I*R, you can move on to understanding how it relates to power: P=(V^2)/R = (I^2)*R.
This power wheel cheat sheet will help you understand what your regulated is automatically doing for you, or determine if it's doing what it's supposed to do.
I was keeping it simple
. People who are afraid of math take one look at that and freak out You can actually do all the calculations with two simple charts and either multiply or divide two numbers. Anyone can do that so that's how I teach it. In an algebra class, the full chart is what I would use.- Status
