Hello vaping fam! I built a nano coil ( I think it's called a nano dragon coil. 28 g wire, 6 wraps around a piece of metal a tad bigger than a syringe) it tested for 3.8-4 ohms. (Dual coil)I have a 18650 vtc5 battery , in a copper stingray with a stillare dripper. Can some please tell me what all that means in watts?
watts?
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Dual coils at 6 wraps of 28ga around a syringe does not equal 3.8-4 Ohms. Something is amiss.
Before you build coils, you should a good understanding of Ohm's Law. Then, you would be able to answer your question about watts. However, what VaPries said, too. BTW, a dual coil 6 wraps of 28g around a 1.25mm shaft (about the diameter of a syringe needle) should read somewhere between .3 and .4 ohms. Are you sure you're reading your meter correctly?
I agree, something's not right here. You say a nano coil, so it's around 1 mm in diameter. You say around a syringe, but I think you mean a syringe needle because a syringe is a lot bigger than 1 mm. However you've got a very high resistance for 6 wraps of 28 gauge wire.
Please clarify.
Just gonna throw this out there... You REALLY shouldn't be building that low if you don't understand ohm's law. All it's going to take is 1 misunderstanding or slipup and we'll be reading about you on the news.
Ohm's Law Calculator
No studying required, just highly recommended you know the formulas for your own safety. Be sure to check your coil's resistance OFTEN and if it falls below your 30 amp limit (Not gonna give you the resistance for when a freshly charged battery will draw more than 30 amps... Use the calculator and familiarize yourself with its mechanics, you should be able to figure it out in a few seconds) then either fix the short or remake the coil.
Ohm's Law Calculator
No studying required, just highly recommended you know the formulas for your own safety. Be sure to check your coil's resistance OFTEN and if it falls below your 30 amp limit (Not gonna give you the resistance for when a freshly charged battery will draw more than 30 amps... Use the calculator and familiarize yourself with its mechanics, you should be able to figure it out in a few seconds) then either fix the short or remake the coil.
Be very careful, BIG difference between .3 and .4 ohms. When you sub ohm you don't want a ball park number, you want to know the exact reading. Ideally you test against that number on different devices when possible just to besafe and use nothing other than 30amp batteries to have a safe enough buffer in the amp limit department.
OK, that makes sense now
Ohm's law (and Watt's law, but that's usually included in discussions about Ohm's law). You don't really need to know the formula, here's an online calculator you can use to figure things out.
Your battery's voltage off the charger will be 4.2 so enter that as Voltage.
Enter .3 in the Resistance field and hit 'Calculate'.
You'll see that you're drawing 14 amps from the battery and making 58.8 watts in the atty.
First off, your battery is good to 30A so you have a healthy safety margin there. Your question about the wattage has also been answered. As your battery voltage drops during use the voltage will go down. If you take the battery out at say 3.7V, the watts will be lower then.
Change the voltage to 3.7, hit calculate and you'll see that you've got 45.6 watts with 12.3A draw from the battery.
There's a lot more info on all things mechanical here.
Hope this helps.
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Cool thanks! I use a ohm reader and I use my mvp also.. they both seem to work. Sometimes I do 7 wraps. It's 0.4 when I do 6 it's usually 0.3 so lately I've been sticking around 6 wraps. I screw it off and on 4-5 times to make sure I keep getting the same reading. I do NOT want to go under 0.3 that's my limit. So far so good. But I was just a little confused on how watts work w the whole vtc5 and all that. That helps a lot! Thanks!
The MVP really isn't a reliable source since it only reads to tenths... Hopefully your other ohm meter reads to hundredths
Huge difference between .31 and .39
That and this are great for when you want to target a certain resistance, but it in no way shape or form replaces an ohm meter to check for shorts after you've built the coil
Maybe a stupid question ... But how do you put a piece of cotton through a coil made around the needle of a syringe?
The center diameter of your coil would be so small, I can't see how you would ever get any cotton in there.
Maybe you just wrap the outside of the coil with cotton?
The center diameter of your coil would be so small, I can't see how you would ever get any cotton in there.
Maybe you just wrap the outside of the coil with cotton?
Both work. If the ID is too small / you're running it at too high a wattage, then the liquid in the cotton threaded through the coil will dry out instantly and you'll be getting burning... But some people manage to run this successfully. With the super small ID coils (Like ones wrapped around another piece of kanthal), wrapping the cotton around the coil works just as well. Look up some nano dragon coil builds on youtube to get the basic idea
Sounds good to me bigtmane and kudos on the multiple checks. Redundancy is a good thing IMO
Well, I took a REALLY small key ring and straightened it out. I use that to wrap on. It's bugger than a syringe needle. But smaller than one of those little screw drivers you use to fix glasses. It's in the middle. I just take the cotton and twist it until it's super skinny , run it thru, then u twist it. That's what I've been doing. I wish I could just post a picture of it
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