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So much for "Please Retain" in the sandbox area.....
Volts, Ohms, Amps, Watts, gone....
I did retain the text I typed though. We lost the conversation and Kat's posts/links, etc.........
oh my! classy used to patrol that area and she would have caught it, i'm sure
must be a different mod in there nowSo much for "Please Retain" in the sandbox area.....
Volts, Ohms, Amps, Watts, gone....
I did retain the text I typed though. We lost the conversation and Kat's posts/links, etc.........
Crap.
It took me some time to find those links. I thought they were safe.
I can find them again, though... Grr... As long as you and Tom kept your writings safe.
Am I glad you can't see my desk ATM...
Very nice, Fran! I hope that chair is comfy.
or my kitchen counter
i better do the right thing before i turn in tonight!
Volts, Ohms, Watts, and Amps.
E-cigs introduce you to terms that you probably wouldn't use everyday without them. Yet, you need to understand some of them, in order to wade through the sites and options and understand the effect of your choices. This post discusses the electrical terms in particular; volts, ohms, watts and amps. The good news is...it isn't really that bad. The bad news is that it isn't a 2 second discussion.
The short answer is that if you have a Variable-Voltage (VV) or Variable Wattage (VW) device, you can just start low, dial it up, and make it work. No math required. However, if you want to UNDERSTAND it, that will take some work on your part. It's not too bad, but it's also something that you don't want to try to cram into a 2 minute reading. You may have to read this a couple of times. That's fine. Don't give up. If you really can't stand reading...skip to part 3.
Part 1 - coming to terms with it
OK let's get some terms straight first:
Volts = Electrical Pressure. Kind of like water pressure.
Ohms = Friction. Resistance to the flow of electricity. Without friction, we'd have no heat in our coils. Like a kink in a water hose.
Amps (amperes) = total electrons flowing past a point. Similar to the volume of water (# of molecules?) going past a point in the hose at one particular instant.
Watts = A measure of "work". Watts = Volts X Amps. How fast it could turn a water wheel.
Watts are kind of an "end-result". No work is done if there's no pressure. Also no work is done if there's no volume of water flowing. You have to have pressure and water flow to get an effective amount of water on the lawn from a sprinkler. High pressure with a very thin hose won't do it. Neither will no pressure with a fat fire-hose. You have to have volume and pressure at the same time. The constriction of a hose is a resistance (like ohms), and determines the flow rate for a given pressure.
All of these things are interrelated. If you change any one thing, the system as a whole is changed. In fact, if you know any two of the above variables, you can calculate the others. They are measurements for different aspects of a particular system. All pieces of the same puzzling phenomenon.
Volts, ohms, watts and amps are quantities that can be measured and related mathematically. That leads to the inevitable formulas....
Part 2 - Finally! Some math. Yay! (or OMG! I hate this stuff.)
Because volts, ohms, and amps are measurable quantities, someone took a lot of measurements of them and figured out how they all relate. The results of this relationship became "Ohm's Law" of electricity. The law was named after the German physicist Georg Ohm, who published them in the early 1800's. Thanks to James Prescott Joule there's also Joule's Law: Watts = Volts x Amps but we're getting ahead.
Now quantities measured need names for them. Feet, meters, pounds, grams are all units of measure. Some of the units of measure for electricity are defined above: Volts, ohms, watts, amps. We have abbreviations for them so we can use them in formulas. The bad news is that you'll see several versions of these abbreviations. The good news is that we'll try to tell you the common ones so you can substitute whatever version you like.
Abbreviations:
Volts = V = E = (Straight line with little dots under it symbol for DC voltage)
Ohms = R = Ω = Resistance
Amps = I = A
Watts = P = W = Power
It's very irritating when you see one set of formulas published here, and another set somewhere else that uses different letters or symbols. Your multi-meter (the tool used to measure these things) often uses a different set too. Yet we have to pick one set. No matter what we select, someone's not going to like it...depending on if they are a "purest" or of they are in the commonly-seen camp. We'll use V for volts, R for ohms (resistance), I for Amps (because A is used for something else except on multi-meters), and P for watts (Power).
OK, so this guy Ohm published a "law" that is stated in modern form as:
Amps = Volts ÷ Ohms or I = V ÷ R
Add in Joule's Law: Watts = Volts X Amps or P = VI
Mathematicians, having nothing better to do than math, re-arranged all this stuff and came up with a list of formulas (note the X here means multiply...it's not a variable):
Amps (I) = V ÷ R, also I = P ÷ V and I = Square-Root of (P ÷ R)
Volts (V) = I X R, also V = P ÷ I and V = Square-Root of (P X R)
Ohms (R) = V ÷ I, also R = V2 ÷ P and R = P ÷ I2
Watts (P) = V X I, also P = R X I2 and P = V2 ÷ R
OK. So the formulas are listed above. What does all this have to do with e-cigs?
Part 3 - Getting to the point, now that we have background and formulas.
You, a user of e-cigs, are basically juggling multiple variables related to electricity. Sure, there's other stuff too...e-juice VG/PG ratios, wicking, etc. but we're discussing electricity here. The point is that there's no ONE variable...there's always multiple things going on at once. Selecting a PV has electrical concerns too...for example the "amp limit" of the device. Swapping a carto out with different ohms means that you'll adjust the voltage (for VV stuff) or deal with the results for fixed-voltage stuff. VW adjusts voltage for you...like it or not.
To reiterate, you can't change one thing without it affecting the others somehow. So here's where we try to explain how what you do effects things. Also, note that this is not an e-cig safety thread. So we try to explain some things, but safety is another subject unto itself. Don't take this as gospel. We're trying to teach general concepts here.
(More to come)>>>>>>>
Voltage. Battery vs Mod.
Carto/Atty/Coil ohms.
Wattage
Amp limits
Special Cases - Dual coils
SLR
Symbols on multimeters
What about:
mAh?
Series vs Parallel (or covered under DCC)
Battery stuff or link to Battery University.
E-cigs introduce you to terms that you probably wouldn't use everyday without them. Yet, you need to understand some of them, in order to wade through the sites and options and understand the effect of your choices. This post discusses the electrical terms in particular; volts, ohms, watts and amps. The good news is...it isn't really that bad. The bad news is that it isn't a 2 second discussion.
The short answer is that if you have a Variable-Voltage (VV) or Variable Wattage (VW) device, you can just start low, dial it up, and make it work. No math required. However, if you want to UNDERSTAND it, that will take some work on your part. It's not too bad, but it's also something that you don't want to try to cram into a 2 minute reading. You may have to read this a couple of times. That's fine. Don't give up. If you really can't stand reading...skip to part 3.
Part 1 - coming to terms with it
OK let's get some terms straight first:
Volts = Electrical Pressure. Kind of like water pressure.
Ohms = Friction. Resistance to the flow of electricity. Without friction, we'd have no heat in our coils. Like a kink in a water hose.
Amps (amperes) = total electrons flowing past a point. Similar to the volume of water (# of molecules?) going past a point in the hose at one particular instant.
Watts = A measure of "work". Watts = Volts X Amps. How fast it could turn a water wheel.
Watts are kind of an "end-result". No work is done if there's no pressure. Also no work is done if there's no volume of water flowing. You have to have pressure and water flow to get an effective amount of water on the lawn from a sprinkler. High pressure with a very thin hose won't do it. Neither will no pressure with a fat fire-hose. You have to have volume and pressure at the same time. The constriction of a hose is a resistance (like ohms), and determines the flow rate for a given pressure.
All of these things are interrelated. If you change any one thing, the system as a whole is changed. In fact, if you know any two of the above variables, you can calculate the others. They are measurements for different aspects of a particular system. All pieces of the same puzzling phenomenon.
Volts, ohms, watts and amps are quantities that can be measured and related mathematically. That leads to the inevitable formulas....
Part 2 - Finally! Some math. Yay! (or OMG! I hate this stuff.)
Because volts, ohms, and amps are measurable quantities, someone took a lot of measurements of them and figured out how they all relate. The results of this relationship became "Ohm's Law" of electricity. The law was named after the German physicist Georg Ohm, who published them in the early 1800's. Thanks to James Prescott Joule there's also Joule's Law: Watts = Volts x Amps but we're getting ahead.
Now quantities measured need names for them. Feet, meters, pounds, grams are all units of measure. Some of the units of measure for electricity are defined above: Volts, ohms, watts, amps. We have abbreviations for them so we can use them in formulas. The bad news is that you'll see several versions of these abbreviations. The good news is that we'll try to tell you the common ones so you can substitute whatever version you like.
Abbreviations:
Volts = V = E = (Straight line with little dots under it symbol for DC voltage)
Ohms = R = Ω = Resistance
Amps = I = A
Watts = P = W = Power
It's very irritating when you see one set of formulas published here, and another set somewhere else that uses different letters or symbols. Your multi-meter (the tool used to measure these things) often uses a different set too. Yet we have to pick one set. No matter what we select, someone's not going to like it...depending on if they are a "purest" or of they are in the commonly-seen camp. We'll use V for volts, R for ohms (resistance), I for Amps (because A is used for something else except on multi-meters), and P for watts (Power).
OK, so this guy Ohm published a "law" that is stated in modern form as:
Amps = Volts ÷ Ohms or I = V ÷ R
Add in Joule's Law: Watts = Volts X Amps or P = VI
Mathematicians, having nothing better to do than math, re-arranged all this stuff and came up with a list of formulas
(note the X here means multiply...it's not a variable):Amps (I) = V ÷ R, also I = P ÷ V and I = Square-Root of (P ÷ R)
Volts (V) = I X R, also V = P ÷ I and V = Square-Root of (P X R)
Ohms (R) = V ÷ I, also R = V2 ÷ P and R = P ÷ I2
Watts (P) = V X I, also P = R X I2 and P = V2 ÷ R
OK. So the formulas are listed above. What does all this have to do with e-cigs?
Part 3 - Getting to the point, now that we have background and formulas.
You, a user of e-cigs, are basically juggling multiple variables related to electricity. Sure, there's other stuff too...e-juice VG/PG ratios, wicking, etc. but we're discussing electricity here. The point is that there's no ONE variable...there's always multiple things going on at once. Selecting a PV has electrical concerns too...for example the "amp limit" of the device. Swapping a carto out with different ohms means that you'll adjust the voltage (for VV stuff) or deal with the results for fixed-voltage stuff. VW adjusts voltage for you...like it or not.
To reiterate, you can't change one thing without it affecting the others somehow. So here's where we try to explain how what you do effects things. Also, note that this is not an e-cig safety thread. So we try to explain some things, but safety is another subject unto itself. Don't take this as gospel. We're trying to teach general concepts here.
(More to come)>>>>>>>
Voltage. Battery vs Mod.
Carto/Atty/Coil ohms.
Wattage
Amp limits
Special Cases - Dual coils
SLR
Symbols on multimeters
What about:
mAh?
Series vs Parallel (or covered under DCC)
Battery stuff or link to Battery University.
Crap.
It took me some time to find those links. I thought they were safe.
I can find them again, though... Grr... As long as you and Tom kept your writings safe.
merde is the word we use here!
watch them lock this thread with no page turning
Perish the thought!
OK kids--time for my evening chores.
Laterz!
Be well and be good!
this kitchen renovation had some wide-reaching effects!
Kitchen is a room of many uses.
laterzzz, tweety!
and in the style of catt
Total verklemmte Tür: Pilot von Air-India sperrt sich aus dem Cockpit aus - Fliegen - FOCUS Online - Nachrichten
sorry, this is in german! but y'all stay away from air india! the pilot was not able to enter the cockpit again after a trip to the loo - the door lock was jammed!
and in the style of catt
Total verklemmte Tür: Pilot von Air-India sperrt sich aus dem Cockpit aus - Fliegen - FOCUS Online - Nachrichten
sorry, this is in german! but y'all stay away from air india!
the pilot was not able to enter the cockpit again after a trip to the loo - the door lock was jammed!
I've always had my mouse and monitor on desktop. Now the monitor is up on the ledge and the mouse is down with the keyboard. Having a hard time getting used to it. Keep reaching up on the desktop for the mouse.
laterzzz, tweety!
and in the style of catt
Total verklemmte Tür: Pilot von Air-India sperrt sich aus dem Cockpit aus - Fliegen - FOCUS Online - Nachrichten
sorry, this is in german! but y'all stay away from air india!
When you gotta go, you gotta go!
And that said...
frannie, you can put that mouse wherever you like it best!
brb!
Yes I know but I'd like to keep it on the keyboard tray so no wires running over the desktop. Yes I know I should get wireless.
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