VV REOS Part VII

[Rhapsodies Fire]

Yep...it stays closed so the updates don't get lost among other posts. Only Rob and myself can post in there. I'm sure there will be another update coming in the next day or so. Rob just got home from his trip.

*edit...haha Tripp is on it!

 

[oldbroad]

O! M! G! you guys just quit now! My tummys aching BAD from laughin so hard!

 

[house mouse]

Thanks for the great info six! Right before my VV Reo cut off the vape suddenly got really weak, I thought the atty was giving up the ghost, 5-10 really weak cool hits before it finally wouldn't fire. I had it set about 4.75 volts. My fairly new xtar WP2 II didn't seem to have trouble recharging them although it only brigs my batteries up to around 4.05 which is fine by me.

So at least compared to yours it seems like my Reo's low voltage cut off isn't functioning properly, I'd hate to send it in for repair it has hardly left my hand since I got it.. I love this Reo!

My understanding was that there isn't a low voltage cutoff in this chip and it will drain your batteries down pretty far. I've sent mine down to 2.3- 2.5 several times because I get engrossed in something else, forget what I'm doing and just keep vaping until it dies. Start with a full bottle and fresh batteries and change them out when you've vaped about half a bottle. That usually takes mine down to 3.3-3.5. When I remember to do it.

They do charge back up just fine though, even drained that low.

 

[zodduska]

Thanks for the feedback house mouse! I wonder about the low voltage cut off, maybe its only in some of them? From what six said it seems like his has a cut off.

I tested my second set of batteries today and they were draining fairly evenly, though maybe the gap starts to widen as the batteries are drained far below spec.

First test:
3.82v top
3.82v bottom

second test:
3.65v top
3.64v bottom

 

[six]

I wonder about the low voltage cut off, maybe its only in some of them? From what six said it seems like his has a cut off.

I might be wrong... but I'm glad we talked about it. It caused me to test a set of my non-AW IMR 18350s today and I found a bad cell. One of my batts after about 1.5ml consumption is at 3.85 (expected) and the other is at 2.82 (unexpected - bad cell for sure). Fresh AWs in it now and bad battery in the bin.

The fact that your batts are currently draining evenly is a good sign. -- I'll try to run my VVW tomorrow as much as possible and test them when it dies. I'll let you know if it's any different than the first couple of times I tested them when the mod shut down.

 

[Jeann]

if my memory serves me correctly it was said by mr. buzzpro somewhere here that there isn't a low voltage cutt off protection. so as i was wondering how to detect it on the vv, i implemented in my routine to meter the batts 2 or 3 times a day, anything below 3.9v goes into the charger. when not at home i just swap batts after about 5 hours of use or so, as it turned out that thats my avarage time i drain them somewhere to 3.7v-3.8v -ish. i kinda like this routine, i do it for all our reo's now, it saves me from being allert while vaping

they discharge very evenly indeed, there is usually only 0.01v difference, i don't even bother to meter the second batt anymore... maybe better to start meter them both again.

 

[MickeyRat]

Actually, I believe it does have a low voltage cut off but, it's on the total not the individual cells. It usually cuts out at around 6 volts total.

 

[whatitstrue]

Originally Posted by BuzzKill

THere is NO cutoff circuit built into the controller , it goes until the batts die

http://www.e-cigarette-forum.com/forum/reos-mods/260459-vv-reos-part-ii-75.html#post5527512

Originally Posted by kazz63758

Buzzkill replied to my PM today and told me what he posted above about a cutoff. I then asked him if there had been any issues with battery longevity, loss of charge capacity, etc. with them being discharged that completely. He promptly replied that they have had no issues in that respect reported.

I'd like to thank him for taking the time and having the patience to answer my questions.

http://www.e-cigarette-forum.com/forum/reos-mods/260459-vv-reos-part-ii-75.html#post5527647

Originally Posted by BuzzKill

If you all have any questions just PM me about them NO PROBLEM !

http://www.e-cigarette-forum.com/forum/reos-mods/260459-vv-reos-part-ii-75.html#post5528479

 

[ltrainer]

http://www.e-cigarette-forum.com/forum/reos-mods/260459-vv-reos-part-ii-75.html#post5527512



http://www.e-cigarette-forum.com/forum/reos-mods/260459-vv-reos-part-ii-75.html#post5527647



http://www.e-cigarette-forum.com/forum/reos-mods/260459-vv-reos-part-ii-75.html#post5528479

I am confused as usual about the cutoff in the VV. THe circuit takes a high voltage as supplied by the batteries and lowers that voltage to whatever is set with the dial. It can not raise the voltage up like a boost circuit can. So my question is: Once the batteries reach a level that can not support the voltage dialed in, won't the VV circuit just not operate essentially cutting off the circuit?

 

[whatitstrue]

I am confused as usual about the cutoff in the VV. THe circuit takes a high voltage as supplied by the batteries and lowers that voltage to whatever is set with the dial. It can not raise the voltage up like a boost circuit can. So my question is: Once the batteries reach a level that can not support the voltage dialed in, won't the VV circuit just not operate essentially cutting off the circuit?

yes, But there is no added circuitry to the controller that would cut off at a certain voltage. So the batteries and the set voltage would determine when the unit cant supply enough power to fire. as apossed to a built in circuit that atomaticly cuts off the unit at a set minumum voltage.

 

[BuzzKill]

I'm having some trouble with my VV Reo not cutting off properly when the batteries are drained. I usually try to remember to charge my AW IMR 18350 every day but sometimes it slips my mind when the vape is so consistent. A few minutes ago the mod stopped firing so I figured I'd test the voltage on the batteries.. one of them metered at 1.94V the other at 2.23. IMHO that's kind of scary. Isn't the cut off supposed to be around 3.3 volts?

IMR's are an unprotected batt. that means they can go LOW like that , the controller does not monitor the batteries BUT if the input voltage is below the set voltage it will not fire , dropping off in the last 5 hits is normal , nothing wrong with your unit !!

It is the voltage UNDER LOAD that matters , voltage will BOUNCE back after being removed from the load so it can be tricky to know exactly what is going on .

the Chip requires a 0.5 volt differential from input to output so it depends on your SET voltage as to when it will cut out.

 

[markfm]

One side note, the unprotected Powerizer 16340 batteries I use in one unit are rated to be driven down to 2.75V, that is their actual spec on how they are to be tested, and the times I've looked at AW IMR they have said 2.5V minimum.

 

[unsure]

One side note, the unprotected Powerizer 16340 batteries I use in one unit are rated to be driven down to 2.75V, that is their actual spec on how they are to be tested, and the times I've looked at AW IMR they have said 2.5V minimum.

I found that to be true with mine too.

 

[Jeann]

IMR's are an unprotected batt. that means they can go LOW like that , the controller does not monitor the batteries BUT if the input voltage is below the set voltage it will not fire , dropping off in the last 5 hits is normal , nothing wrong with your unit !!

It is the voltage UNDER LOAD that matters , voltage will BOUNCE back after being removed from the load so it can be tricky to know exactly what is going on .

the Chip requires a 0.5 volt differential from input to output so it depends on your SET voltage as to when it will cut out.

trying to understand this, so don't kill me if am wrong

for example, if the set voltage is 4.5v and the output voltage under load is 4.45v there is a cut off.
lets say they bounce back to 4.5v, with the batts draining evenly each batt is down to 2.25v?

 

[Dan Patrick]

Yep. There is a red light in with the vv chip and i can see it also. I think we all can.

Now, as far as seeing it through the wood from the back of the mod, i honestly don't know. I have never looked at the back of my mod in a dark room.

But yes, that light is normal and we all have it.

No light in the Ebony VV W 1! I have a buzz so I know what to look for and there is no light in my lighthouse. Rob knows us ebony guys keep it stealthy!

 

[unsure]

Well since my eyes aren't as sharp as they use to be...with help I was surprised not to see a light in my TESLA but more of a light show. I was able to capture and blowup a microscope pic .....

 

[zodduska]

Thank you everyone for posting the details about how the VV chip works in regards to the batteries running low, special thanks to BuzzKill for designing this killer chip and Rob for implementing it! I tested my set that dipped low and they are discharging nice and evenly.. I just have to remember to charge them once a day, no problem!

By the way mine gives a nice red/blue + red shines through the back lightshow.. I'll post pics later.

 

[rockyroad]

shhh!

I think I see something in my Reo and please don't tell anyone but I ordered 2 hh357"s specifically for her. I was the guy who went off about the price and said never ever ever.....ever never land is almost here
Actually I've been having issues lately with all my different brands of atty's and I'm wearing thin from it. I have a 2.0 boge carto going at the moment...

 

[BuzzKill]

trying to understand this, so don't kill me if am wrong

for example, if the set voltage is 4.5v and the output voltage under load is 4.45v there is a cut off.
lets say they bounce back to 4.5v, with the batts draining evenly each batt is down to 2.25v?

No Killing here LOL ! , it is .5 volt differential so if it is set to 4.5 volts, when the total battery voltage goes below 5.0 volts it will cut off.

same if it is set to 5.0 volts then 5.5 volts will be the cutoff . .5 volt differential from input to output.

There is a BLue/Red led on the PCB BUT it is designed to be seen from the side , the way the Reos PCB is made you cannot see the BLUE led.

FYI

 

[zodduska]

I can see the blue LED on mine but its pretty faint, not visible unless in a dark room.

As promised here's my REO light show, longish exposures