Input wanted?

[Pope]

Okay I am a R/C car racer. I have a ton of expirence with batteries and electronics far above what is used in all the mods I have seen. I am thinking of making a few of my own but wanted some input from all of you on what you would like to have in your perfect mod. Here is my check list so far.

1. Varying voltage from 3.7-8.4 v and anywhere in-between.

2. No battery changing. I am going to use life or lipo batteries with around 3000mah.

3. A good button.

4. Small. About the size of a normal cell phone.

 

[Pope]

I am inclined to go life batts because the are far safer but would limit max voltage to 7.2 volts.

Also cost on these things would be very low.

And if I used a 1400mah battery they would be the size of 4 aa batters in a fist.

 

[r3dgh0s7]

sounds cool! I'd only want something up to 6v, anything over that tastes burnt to me

 

[Pope]

What is used in our curent PV's are round cell LiFe Batteries. on a full charge you six volt device is actually putting out 7.2. Nomanal voltage on it is 6.6v and nomanal voltage on your normal PV is 3.3v.

I am perty sure I will stay with LiFe but go to flat cell 2s Life batteries. One battery gives you the voltage and mah of two round cells and you loose all the extra size and weight of the round cell can.

 

[mianker]

My perfect mod has to be
1) tube shaped (I like the feel better than any of the box mods I've tried)
2) great button deffinately prefer one that users can fix replace (prefer mechanical)
3) some sort of juice feed
4) variable voltage big plus
I'm sure there are additional wishes for the perfect mod, those are just the ones that came immediately to my mind. Good luck and please keep us informed on the progress.

 

[markfm]

A lot of the mods seem to use regulators, so they aren't putting out more than 5V or 6V max, even though the batteries may be able to pump 7+ out.

(I've been staring at a few of the mod threads -- I really like my 808, but as a EE expect I'll play with one, just because )

 

[Pope]

Yea I have seen that most use some type of resistince to bump the voltage down a bit.

I am not a fan of the big box mods either but also not a big fan of the large falic looking mods either. going to try to go for a easy to hold shape that is small enough to fit in your pocket easy. would also like to come up with some way to make it so you can fold your addy or carto into it so you don't have to worry about it breaking off in your pocket. probley make the device so it can be turned off so even if you hit the button in your pocket it won't fire.

 

[Pope]

Trying to figure out charging cause not everyone has $200 batterychargers.

 

[UntamedRose]

Why in the world does anyone need a 200 battery chargers?
a universal cost like 15.00

 

[Pope]

It is the charger I use for R/C cars. I need to find a cheap balance charger for Life cells for others who may want one of these.

 

[VpnDrgn]

Yea I have seen that most use some type of resistince to bump the voltage down a bit.

I am not a fan of the big box mods either but also not a big fan of the large falic looking mods either. going to try to go for a easy to hold shape that is small enough to fit in your pocket easy. would also like to come up with some way to make it so you can fold your addy or carto into it so you don't have to worry about it breaking off in your pocket. probley make the device so it can be turned off so even if you hit the button in your pocket it won't fire.

Do a search for "sidewinder" on here. This is a mod using a flat camera battery with the atty attachment on a swivel and the button covered by the atty when in "closed" position. I would be very interested to see something done with the flat battys in a 3.2v/3.7v/5v adjustable format.

 

[Blaze]

Why in the world does anyone need a 200 battery chargers?
a universal cost like 15.00

Yes, but the old saying applies here moreso than a lot of places....You get what you pay for.

That being said, check out the PILA chargers. The specs alone on them make me think it's a safer way to go, and I'm all for paying a few extra bucks in the name of safety and durability

 

[Blaze]

Okay I am a R/C car racer. I have a ton of expirence with batteries and electronics far above what is used in all the mods I have seen. I am thinking of making a few of my own but wanted some input from all of you on what you would like to have in your perfect mod. Here is my check list so far.

1. Varying voltage from 3.7-8.4 v and anywhere in-between.

2. No battery changing. I am going to use life or lipo batteries with around 3000mah.

3. A good button.

4. Small. About the size of a normal cell phone.

IMO, I would stick with the LiFePO4 batts. They're economical, and supposed to be extremely safe, even in series.

Also, 8.4v is just overkill. I got rid of my Lith 16340 because I kept blowing attys (was before I learned that off a charger, those batts are actually 8.4v, not 7.4v). That high of a voltage number is, again IMO, just a bit too extreme for vaping

The onboard charging is a great idea, along with the size idea. And if you find a switch that will last longer than 5-6 months and NOT cost $8 or more, let me know please

 

[Pope]

I have the switch. It is one that is used in a car that senses when the door is open. Weather it will last only time will tell

 

[Princessdee]

I really, really want a little sister.

It's small, not pipe bomb shaped and variable. I use 6V now on my box mod and love it. I won't go back to 5V.
(and I prefer box over pipe bomb)

It's price prohibitive for me, tho

So something like that, but affordable.

 

[zbasspro]

My understanding is the little sister uses a regulator that uses 7.4V every time the button is pushed....if you have it dialed down to 5V it is still drawing 7.4 and the excess is released in the form of heat. They are inexpensive regulators, and that's how they're selling them for that price. With two 10440 batts that's going to drain them fast.

I must stress that this is my understanding, albeit verified by someone I trust, and that's the only reason I don't have one. So if someone with more knowledge knows this not to be the case please explain.

 

[Pope]

I have not seen it so I can't say for sure but I can tell you that 95% of voltage regulators that step down voltage use resistors of some sort. I can also tell you that a battery always puts out the max voltage it can. It is how many amps are being pulled that effects how long it can put that voltage out. with resistors the amp draw does not change so the run time on the battery will nither increse or decrease over what it would be unresisted.

And yes in simple physics terms the electrical energy is decreesed in a resistor by changing it to thermal energy.

I hope that helped.

 

[zbasspro]

I have not seen it so I can't say for sure but I can tell you that 95% of voltage regulators that step down voltage use resistors of some sort. I can also tell you that a battery always puts out the max voltage it can. It is how many amps are being pulled that effects how long it can put that voltage out. with resistors the amp draw does not change so the run time on the battery will nither increse or decrease over what it would be unresisted.

And yes in simple physics terms the electrical energy is decreesed in a resistor by changing it to thermal energy.

I hope that helped.

Yes and No. I don't really know a whole lot about this stuff. So is it better to boost the voltage or regulate it? Seems like by boosting you wouldn't lose energy....but not so when regulating?????

 

[Pope]

Voltage boosting is dangerous with this cells. If you are not careful you could over draw the cells c rating. If you do that on a lipo you just turned your pv into a handgrenade. Lipo batteries will explode when the voltage drops below 3v per cell or when their max capacity or when charged to more than 4.2v per cell.

Life batteries on the other hand turn into smoke bombs and do not explode.

This is why I store lipo batteries in a kevelar bag and use a $200 charger on them that charges and balances each cell in the battery indivudaly.

Maybe I am taking a simple pv mod to far but I don't want to die or get burned because of a mod that uses these batteries without proper lowvoltage cut offs. All of a sudden you chuck turns into a pipebomb in your hand when the voltage in the battery drops to low.

 

[Maialeth]

Personally I'd like to see the batteries able to be charged by the unit.. but also able to be replaced when they start to fade from the recharge cycles.