Circuit design, couple of questions

[jharres]

Hello Modders...

I'm wanting to create my own mods and have been working on circuit design. I'm no expert, but have had some help and done quite a bit of reading. I've noticed a few things as I've modeled circuits and looked at the balance of the variables.

It seems that watts is the factor that controls how hot the atty burns and therefore how well it produces vapor, correct? Of course, I know there is a sweet spot where it's putting off a good amount of vapor, but not burning the juice, as such, I've set the goal to be roughly 8 watts.

With a 3.7 volt battery and a LR 1.7 ohm atty, it looks like the output is 8 watts and the current drawn is 2.18 amps. With a 6 volt battery and a HR 4.5 ohm atty, the output is also 8 watts, but the current drawn is only 1.33 amps. So same power output, but lower amps. Does this mean that, with the 6v setup, the batteries would last longer, assuming that the mah rating is the same in both the 3.7 and 6v batteries?

Is it safe to assume that the 6v setup I described above would increase the life of the atty?

Finally, I've been searching for a source to figure out what the standard resistance levels are for various attys. Does anyone know of any such listing?

Thank you for your assistance,
Jacob

 

[SurvivorMcGyver]

Hello Modders...

I'm wanting to create my own mods and have been working on circuit design. I'm no expert, but have had some help and done quite a bit of reading. I've noticed a few things as I've modeled circuits and looked at the balance of the variables.

It seems that watts is the factor that controls how hot the atty burns and therefore how well it produces vapor, correct? Of course, I know there is a sweet spot where it's putting off a good amount of vapor, but not burning the juice, as such, I've set the goal to be roughly 8 watts.

With a 3.7 volt battery and a LR 1.7 ohm atty, it looks like the output is 8 watts and the current drawn is 2.18 amps. With a 6 volt battery and a HR 4.5 ohm atty, the output is also 8 watts, but the current drawn is only 1.33 amps. So same power output, but lower amps. Does this mean that, with the 6v setup, the batteries would last longer, assuming that the mah rating is the same in both the 3.7 and 6v batteries?

Is it safe to assume that the 6v setup I described above would increase the life of the atty?

Finally, I've been searching for a source to figure out what the standard resistance levels are for various attys. Does anyone know of any such listing?

Thank you for your assistance,
Jacob

To start at your end here is a chart of a few of the stadard atty resistance levels (Thanks Ralf T)

Your watt facter analysis is correct - For Vapor AND throat hit (for me and my juice anyway).

8 watts is a good goal -- be sure to test a few mods at that output to be sure it's enough -- I prefer 10 but most often start at 12 - when I get to 8 It's time to change batteries (that's with a 5.2 ohm atty). My preference, however, is 4.9 Ohms. A bit hot at 8.4 volts but it mellows to 10w quite nicely.

And yes, the higher resistance atties will give you a better battery life. With your six volt set-up - batteries WILL last longer.

Regarding life of the atty -nothing is safe to say. Design, maintenance, use and juice are ALL key and limiting factors -- the science is still out for evaluation - your own personal experience the best teacher.

Hope the helps. Good luck and keep us informed on your endeavors,

 

[jharres]

To start at your end here is a chart of a few of the stadard atty resistance levels (Thanks Ralf T)

Your watt facter analysis is correct - For Vapor AND throat hit (for me and my juice anyway).

8 watts is a good goal -- be sure to test a few mods at that output to be sure it's enough -- I prefer 10 but most often start at 12 - when I get to 8 It's time to change batteries (that's with a 5.2 ohm atty). My preference, however, is 4.9 Ohms. A bit hot at 8.4 volts but it mellows to 10w quite nicely.

And yes, the higher resistance atties will give you a better battery life. With your six volt set-up - batteries WILL last longer.

Regarding life of the atty -nothing is safe to say. Design, maintenance, use and juice are ALL key and limiting factors -- the science is still out for evaluation - your own personal experience the best teacher.

Hope the helps. Good luck and keep us informed on your endeavors,

Thank you for your response. It helps to know that I am on the right track. The chart has been incredibly helpful as well.

As for the higher wattage, I didn't think about the throat hit. My wife likes a good throat hit when she vapes, I am just looking for better vapor production. I don't mind a decent throat hit, but don't want it to be overwhelming. Now, I do realize I'm speaking about subjective issues here, but I think I will stick to aiming for an 8 watt output for my first mod and take it from there.

So far, I've liked the 901 atty over the 510, but I've been playing with them at 3.2 and 3.7 volts. My favorite his so far has been the 901 on a fresh 3.7v battery (that actually is reading at about 4.2v initially). So, the reason I bring this up. Is there anything fundamentally different about the attys, (aesthetics and connector excluded) besides the resistance that would effect how it produces vapor? Or is the resistance and subsequent power output the distinction?

As for the atty lasting longer. I do understand the variables and all that. Rather, I think a more accurate question would be, are the higher resistance attys made with a thicker coil?

 

[SurvivorMcGyver]

Thank you for your response. It helps to know that I am on the right track. The chart has been incredibly helpful as well.

As for the higher wattage, I didn't think about the throat hit. My wife likes a good throat hit when she vapes, I am just looking for better vapor production. I don't mind a decent throat hit, but don't want it to be overwhelming. Now, I do realize I'm speaking about subjective issues here, but I think I will stick to aiming for an 8 watt output for my first mod and take it from there.

So far, I've liked the 901 atty over the 510, but I've been playing with them at 3.2 and 3.7 volts. My favorite his so far has been the 901 on a fresh 3.7v battery (that actually is reading at about 4.2v initially). So, the reason I bring this up. Is there anything fundamentally different about the attys, (aesthetics and connector excluded) besides the resistance that would effect how it produces vapor? Or is the resistance and subsequent power output the distinction?

As for the atty lasting longer. I do understand the variables and all that. Rather, I think a more accurate question would be, are the higher resistance attys made with a thicker coil?

Give your thanks to Ralf T on the chart. I have my own posted somewhere deep in these forums but instad of a look-up chart; mine is an active worksheet that you plug in your real time figures to get an estimate of where you'll be wattage and amperage wise -- PM me and I'll send a link.

I've never torn down a 901 -- but to me to 510 in findementally better in design. How that is actually achieved? I'm in the dark (at least for now). My experience dictates that both the restance AND the coil/wicking/pot design is are the key factors/differences. I prefer to 510.

"Thicker" coil.... Hmmm.... Probably not - thinner or longer is probably the case. "Generally" speaking - A smaller diameter wire used in the fabrication of the coil at the same length normally used will give you More resistance. A larger diameter wire with equal length will give you less resistance. -- Equal diameter but longer length with increase the resistance. One would literally have to tear one down to determine what was done to get to where they are.

I do know that the life of BOTH low AND High resistance atties is generally shorter than the "standard". Why, I do not know. But I do know the "experience" is BY FAR more along the line of my liking (well , except for the life )