Check my build?

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suprtrkr

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What did you switch the battery in? The ohmmeter? If so, perhaps the circuitry in it is voltage sensitive. (It is very hard-- read expensive-- to build an accurate milliohmmeter; most of the good ones are hundreds of dollars and generally unusable for vape purposes as they have currents of hundreds of amperes, being intended to test motor windings. If you paid less, you probably didn't get much. The only really good way to measure such things at the level vapers need is a 4-wire Kelvin probe setup; I've never seen one, even Chinese made, less than a Franklin.) A better guess is, the difference in readings is only .04Ω. For most vape meters that's a rounding error. You might have gotten that much, or more, variance, just by twisting the atty in the 510 connector a bit. We're talking a very tiny amount
 

Theboy

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What did you switch the battery in? The ohmmeter? If so, perhaps the circuitry in it is voltage sensitive. (It is very hard-- read expensive-- to build an accurate milliohmmeter; most of the good ones are hundreds of dollars and generally unusable for vape purposes as they have currents of hundreds of amperes, being intended to test motor windings. If you paid less, you probably didn't get much. The only really good way to measure such things at the level vapers need is a 4-wire Kelvin probe setup; I've never seen one, even Chinese made, less than a Franklin.) A better guess is, the difference in readings is only .04Ω. For most vape meters that's a rounding error. You might have gotten that much, or more, variance, just by twisting the atty in the 510 connector a bit. We're talking a very tiny amount

Okay that's good to know, I have a coil master 521 mini V2. Thank you
 
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suprtrkr

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Okay that's good to know, I have a coil master 521 mini V2. Thank you
That's a very good one, in a reasonable price range. I use the 521 Tab full size myself. But yeah, the difference you're observing is peanuts, probably below the native accuracy limit of the device. It's basically meaningless. If you're handy with electronics, I can tell you how to build a Kelvin setup with a salvaged DC power supply and a couple of 741 op-amps...
 
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Theboy

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Thank you very much for the offer. But i'm very new to electronics and am still trying to learn ohms law and battery safety etc. Do you know any where good I could learn this?

That's a very good one, in a reasonable price range. I use the 521 Tab full size myself. But yeah, the difference you're observing is peanuts, probably below the native accuracy limit of the device. It's basically meaningless. If you're handy with electronics, I can tell you how to build a Kelvin setup with a salvaged DC power supply and a couple of 741 op-amps...
 

bombastinator

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Thank you very much for the offer. But i'm very new to electronics and am still trying to learn ohms law and battery safety etc. Do you know any where good I could learn this?
There should be a few good tutorials around here. @BrotherBob seems to be the master of links, he may have some good suggestions should he happen along.
 

papergoblin

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I have some mods that do that, say .5 then batteries need change and go to .55 or .6 (swap back and resistance goes down), I've assumed some of it is due to the battery sag (internal resistance). I notice it more as certain pairs are due to be retired.

Then again I've had meters read .5, tighten the atty down a touch more and it might go up or down. No matter the casing, majority of all these meters have the same Chinese chip/board in them.
 
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BrotherBob

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Hello, I'm new to RDAs and battery safety but I have watched a few videos and tried looking stuff up.
I have a single coil build that is 0.75 ohms, Samsung 30q INR batteries on a Smok alien 220w. Is this okay many thanks.
Welcome and glad you are vaping the ultimate in atomizer technology.
Your build is fine if your goal is to produce moderate to large clouds and and decent to good taste.There is no published gear,settings/builds that every vaper will agree on.
Might like to read:
http://vaporcloudreviews.com/beginners-guide-to-dripping/
Drip Vaping: Your Guide to Dripping e-Juice | Vape-Resource.com
http://spinfuel.com/art-drip-guide-vaping/
https://www.e-cigarette-forum.com/forum/blog-entry/7-information-resources-for-your-first-rba.4454/
https://quitsmokingcommunity.org/electronic-cigarettes/what-is-an-atomizer-definition/
Rebuildable Tanks Explained: RBAs vs RDAs vs RTAs vs RDTAs
https://www.e-cigarette-forum.com/forum/threads/wrapping-building-coils-101-for-beginners.745045/
http://www.geekayvapes.com/squonking-101/
https://www.e-cigarette-forum.com/forum/threads/i-love-my-rda.805461/#post-19616327
https://www.e-cigarette-forum.com/f...re-and-lower-resistance.706656/#post-16692106
Thank you very much for the offer. But i'm very new to electronics and am still trying to learn ohms law and battery safety etc. Do you know any where good I could learn this?
If you sub-ohm, you should pay particular attention to safety:
Might like to read:
http://best-e-cigarette-guide.com/e...cigarettes/sub-ohm-vaping-perks-and-problems/
http://vaping360.com/what-is-sub-ohm-vaping-and-the-dangers-of-sub-ohm-vapes/
https://spinfuel.com/sub-ohm-vaping/http://www.discountvapers.com/battery-safety/
http://www.discountvapers.com/care-and-use-of-510-ego-and-variable-voltage-batteries/
https://www.e-cigarette-forum.com/forum/blog-entry/7-information-resources-for-your-first-rba.4454/
https://www.e-cigarette-forum.com/forum/threads/ecf-sub-ohm-advisory.562106/
Ohms law, I like:
http://www.steam-engine.org/ohm.html
 

zoiDman

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Hello, I'm new to RDAs and battery safety but I have watched a few videos and tried looking stuff up.

I have a single coil build that is 0.75 ohms, Samsung 30q INR batteries on a Smok alien 220w. Is this okay many thanks.

If you are thinking about the Amp Draw on your Batteries, then for a Regulated Mod, the Ohms do Not Matter. It's the Wattage you set the Mod to and the Voltage of the Battery that Determines Amp Draw.

Here is a Good Site where you can plug in what you have and the Wattage you might use to see the Amp Draw at the Atomizer and the Amp Draw on the Battery.

Battery drain | Steam Engine | free vaping calculators
 
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Baditude

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Hello, I'm new to RDAs and battery safety but I have watched a few videos and tried looking stuff up.

I have a single coil build that is 0.75 ohms, Samsung 30q INR batteries on a Smok alien 220w. Is this okay many thanks.

You essentially asked the same question in your other thread. Go back and read it. Safety build.
 
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