Eleaf Istick

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aldenf

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If a device is doing PWM, it would stand to reason that the as the Displayed Voltage approaches the Peak Voltage, that the Perceived Hit approaches that of Constant Voltage.

The higher the set voltage and the higher the resistance, the less discrepancy twixt Vavg & Vrms.
 

zoiDman

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The higher the set voltage and the higher the resistance, the less discrepancy twixt Vavg & Vrms.

Think of it More as What Happens when the Duty Cycle Approaches 100%.

Because Isn't 100% Duty Cycle Constant Voltage by Definition?

And that gets back to that Vpk = Vavg and C=1 thing.
 
I had the chance to check the output of my istick today with the scope at work. Unfortunately, I don't know how to work the thing (apparently) and the extra info on the right side was replaced by the picture saving menu.

It was tested with a 1.6 ohm coil. The first trace (low duty cycle) is with the istick set to 3 volts, and the second is with it set to 5.5 volts.It definate boosts to about 5.8 volts and then PWMs the output.
What you can't see is that the RMS voltage determined by the scope is NOT the same as the voltage it was set to. RMS was high on the 3 volt setting and low on the 5.5 volt setting. PWM frequency was about 81Hz.

TEK0000.jpgTEK0001.jpg
 

zoiDman

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I had the chance to check the output of my iStick today with the scope at work. Unfortunately, I don't know how to work the thing (apparently) and the extra info on the right side was replaced by the picture saving menu.

It was tested with a 1.6 ohm coil. The first trace (low duty cycle) is with the iStick set to 3 volts, and the second is with it set to 5.5 volts.It definate boosts to about 5.8 volts and then PWMs the output.
What you can't see is that the RMS voltage determined by the scope is NOT the same as the voltage it was set to. RMS was high on the 3 volt setting and low on the 5.5 volt setting. PWM frequency was about 81Hz.

View attachment 379676View attachment 379677

The Left-Hand trace looks like it should. Basically 1/2 on and then 1/2 off for 5.8v/0v to make "3v"

And he Right-Hand trace looks like it should also. Basically All On at 5.8v to make "5.5v".
 

DHCrocks

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Post a pic of that puppy

Jay G

here's a pic the screwdriver I got my o-ring from. you can see it on the main body of the screw driver where the threaded portion is. it's a perfect fit.. just one of those elcheapo deals they give you with atomizers or a glasses repair kit.

 

Wow1420

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I had the chance to check the output of my iStick today with the scope at work. Unfortunately, I don't know how to work the thing (apparently) and the extra info on the right side was replaced by the picture saving menu.

It was tested with a 1.6 ohm coil. The first trace (low duty cycle) is with the iStick set to 3 volts, and the second is with it set to 5.5 volts.It definate boosts to about 5.8 volts and then PWMs the output.
What you can't see is that the RMS voltage determined by the scope is NOT the same as the voltage it was set to. RMS was high on the 3 volt setting and low on the 5.5 volt setting. PWM frequency was about 81Hz.

81Hz is good news. Maybe they've already increased it on recent production, since earlier reports were lower.
Does yours have the version screen when pressing both up and down buttons? (Mine does not)
 

melloyello

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ive had my istick for about a week and a half and i really like it.
I dont know if its in my head now that ive been reading about lower power but it "seems" that the output voltage isnt "quite" as high as it was in the beginning but again...it could be in my head,
I do like this little thing a lot, i hope v2 would have a spring loaded center pin.
im using a full sized kfun on it and when i hold it in my hand, all you can see is little bit of the top of the tank.
I couldnt care less if this is running vrms or vvgg or hgjr ......or t@h&gw4 for that matter.
it works for me and to me, thats all that counts.
 

Wow1420

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Lets take a vote. Everyone that loves ur iStick raise your hand!! :laugh:

Two weeks with mine and I'm happy as a clam. :thumb:

Used it exclusively today, 1.5 tanks of the Kayfun and the battery is still above half full on the gauge, set at 7 watts. (while I'd use 8.5 or 9 on the MVP).
 

Tech Junkie

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Ok, so here are the impressions of a complete newbie!

To prove that I am a newbie I will certify that until the iStick I only had an EVOD starter kit. That means that Volts, Watts, Amps and all the electrical engineering discussion up to now were never a consideration until I purchased the iStick. Why did I buy it you ask? Well I bought it because I seemed to be charging my EVOD batteries all the time and I wanted to come home after a day at work and enjoy my vape without having to throw a battery on the charger. I also purchased it because I wanted to have better control of the temp and flavor. The EVODs are ok, but as you know they are what they are and you get what you get.

Not having any of the preconceived notions I have to say WOW! This is what vaping can be! Real vapor and flavor! I found flavors in my juice I didn't know existed and with the same tanks. I have a Protank Mini 3 and EVOD Glass with a 1.5 Ω coils and set at 6.0W it runs 3.0V my standard EVOD tanks have 2.0 Ω coils and I run them at 7.0W and 3.7V. Now before anyone tells me that the volts or watts are not what they seem I DO NOT CARE! PERIOD! For what I paid this thing just works and the flavor and vapor production is heads and shoulders above anything I have experienced to date.

I can understand where more advanced users might care and at some point in my vaping journey I may find a reason to care as I love tech and I can understand that electronics should technically work as advertised. That said, what I am more interested in at the end of the day is the overall experience. The iStick delivers a great experience and with some experimentation I have been able to determine the best settings for my Protank Mini 3, EVOD glass and my standard EVOD tanks. Now I am thinking of upgrading to a higher capacity tank with the BVC coils and take it to the next level. After that maybe a kfun and building my own coils!

Even though I love all things tech, I also love things that simply work and the iStick works for me!
 
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