Loaded Voltage

[Ralph T]

I blew air in the atty before testing it was dry when I measured for resistance, when I did the burn test it was wet. I read somewhere that atties with low resistance are prone to failing when you do a dry burn, and no more than 4 seconds between each test.

Just a progress report atty died after 3 3 second hits of HV vaping. I thought these atties were tougher than this though, I chose this atty because it was an original 510 titans and not replacement atty. I still remember my first oem 901 atties, they lasted 2 months in HV vaping before they gave out. I guess it was wishful thinking to assume it was the same across the board.

Bummer dude. Sorry you lost an original!

 

[BuzzKill]

Ralph have a beer for me too !!! , You need to heat sink the lm317 , The higher the differential the more energy is wasted. Heat sink it NO problem , (get a cheap heat sink also )

Dual monitoring of the system ( Volts and Current ) give you real world, real numbers of the atty resistance under load ! . These relationship between Res. vs Voltage vs. Current ARE OHMS LAW ! it really does take into account what is happening , The Ni-chrome wire has a variable resistance to it under load , the liquid is coating the wire intermittently ( not sure of the resistive properties of the juice when hot or cold ? )
There are quite a few variables ,But a dual monitoring system will give you proper analysis of the situation.
You do need 1 stable part either V or I ,so constant voltage or constant current .

Rocketman/Ralph are you guys electrical/electronics eng. ? good to have some knowledge around here.

As far as PWM controllers go for me the part count is way to high , there are some very good regulators designed for battery systems out there.
I dont know the efficiency #'s between them need to do some research .

Heres an excellent link to regulators PWM vs. Linear etc. http://www.maxim-ic.com/app-notes/index.mvp/id/737

 

[Ralph T]

Ralph have a beer for me too !!! , You need to heat sink the lm317 , The higher the differential the more energy is wasted. Heat sink it NO problem , (get a cheap heat sink also )

Dual monitoring of the system ( Volts and Current ) give you real world, real numbers of the atty resistance under load ! . These relationship between Res. vs Voltage vs. Current ARE OHMS LAW ! it really does take into account what is happening , The Ni-chrome wire has a variable resistance to it under load , the liquid is coating the wire intermittently ( not sure of the resistive properties of the Juice when hot or cold ? )
There are quite a few variables ,But a dual monitoring system will give you proper analysis of the situation.
You do need 1 stable part either V or I ,so constant voltage or constant current .

Rocketman/Ralph are you guys electrical/electronics eng. ? good to have some knowledge around here.

As far as PWM controllers go for me the part count is way to high , there are some very good regulators designed for battery systems out there.
I dont know the efficiency #'s between them need to do some research .

Heres an excellent link to regulators PWM vs. Linear etc. Choosing the Right Power-Supply IC for your Application - Maxim

Good reference information. Thanks.

As for me. Retired USAF. Last 17 of my 20 was Ground Radio Maintenance. The first 3 was Jet Engine Mechanic. Now I'm just a single dad, three teen girls, no money, no time, and this frickin' addicting hobby, oh, and I am a computer consultant.

 

[Rocketman]

So a radio controlled jet powered MOD is in the future?

 

[Ralph T]

So a radio controlled jet powered MOD is in the future?

TSA would love that one.

Not smart enough for that. That's where ewe engineer types come in!

 

[Global_Apathy]

So I'm new to this forum, been reading posts almost like an addiction. I have a background in electronics and there would be a simple way to make a voltage controlled pwm circuit using a pot a PIC microchip and a transistor. I've got a bit of microcontroller experience. Though I was thinking that a selectable constant current source would be beneficial to vaping. There are single chip current controllers that require a shunt as feedback and a reference as a setting. The reference can be user selectable.

I guess the basis of this post is that if you have a current source it wouldn't matter what the resistance of you atty is. From what I have read they all function somewhere between 1 and 3 amps.

On a side note I'm working on a simple circuit to remove the mechanical switch in my mod in progress... might take a bit of time I travel a lot for work

 

[Ralph T]

So I'm new to this forum, been reading posts almost like an addiction. I have a background in electronics and there would be a simple way to make a voltage controlled pwm circuit using a pot a PIC microchip and a transistor. I've got a bit of microcontroller experience. Though I was thinking that a selectable constant current source would be beneficial to vaping. There are single chip current controllers that require a shunt as feedback and a reference as a setting. The reference can be user selectable.

I guess the basis of this post is that if you have a current source it wouldn't matter what the resistance of you atty is. From what I have read they all function somewhere between 1 and 3 amps.

On a side note I'm working on a simple circuit to remove the mechanical switch in my mod in progress... might take a bit of time I travel a lot for work

Glad to have you on-board. Nicotine probably got you here. Welcome to the secondary addiction that is the ECF.

 

[Global_Apathy]

did a bit of googling and it looks like a TL5001CPSR pwm controller might do the trick

 

[Rocketman]

Forums are addictive, especially if you are having trouble getting your meds adjusted.

Welcome,
Rocket,
the OCD poster child