easy 5v/3.7v pv?

[Dale.s]

I found this item on DX, and it just screams "mod ME!" all id have to do, is slap on 2 switches (for 5.6v and 3.7v) and throw in a atty connector, and youve got a 18650 powered, usb recharable, 3.7 AND 5.6v pv (not to mention free case, flashlight, and portable usb power if you really need it). Now i just goto work out where to put the connectors, first thought was use a usb connector and make a "pv module" for it, but then you cant use as a passthrough. maby strip the case off and throw it in a boxmod? Got any ideas?

Good description sku
Cheap SKU

Only diffrence seems to be the cheaper one dosnt have a wall charger, its usb charge only.

Edit: I forgot to mention, it has a charge level indicator too!

 

[codfish124]

just make a USB plug mod with a switch looks like the thing has an on off switch so you would just need a usb plug and a momentary switch then epoxy all that on with a atty connector. then you don't have to mod that unit at all.

 

[Dale.s]

Thats the first thought i had, then i thought... hrm, built is usb passthrough too?? Does a usb connector have a 3v line by any chance? would be very sweet to make a usb plug mod with 2 voltages, wouldnt mind loosing passthrough then... or i could add a mini usb connector to the side of the plug mod.. so many idea!

 

[codfish124]

check out my mini usb post http://www.e-cigarette-forum.com/forum/battery-mods/41398-best-5v-mini-usb-pass-through.html this one you could do a mod for a 3v system the led light runs off 3 volts i was gonna think about adding another switch and running a 3v circuit off of it if the lid was just a tad bigger you could run a 3v 3.7v and a 5v just with the stuff that is in there alreaddy. o man you got me thinking glade i don't have any switches right now and to lazy to go get any

 

[Dale.s]

I just got through looking at your mod and i got to thinking too, the black button for the light, could that be used to toggle 3.7v and 5v? maby add a little red led that lights when in 5v light (it is POWER mode after all).

edit: Found out the battery in that device is "220 mAh 3.7v 20×25x6.2mm Li-poly cell", that would make it a li-po version of a janty stick. i likey!

 

[codfish124]

i love it and the size is so small need a smaller atty to use with it stealth all the way.

it works well on just the battery or on the usb side of it but when you use just the battery you don't get pass through.... but the battery charges quick about an hr.

 

[Scubabatdan]

Check my post on this portable power pack, and read the message and look at the mod warp1900 completed using one of these.
http://www.e-cigarette-forum.com/forum/modders-forum/30779-more-power-2.html#post491246

Awesome little power packs!
Dan

 

[Jason365]

Question for you guys that have this.
Does it take the 3.7 18650 and bump it up to 5.6?
Also what in the ma output. 500 or 1500? or do you know?

I would love to pick one up but I don't need it if it does not run a atty well. I love the idea of the 5+ volt output from a 3.7 battery. What are the chips that do this? Can I get one and put it in a nicostick.

Jason

 

[Nuck]

Question for you guys that have this.
Does it take the 3.7 18650 and bump it up to 5.6?
Also what in the ma output. 500 or 1500? or do you know?

I would love to pick one up but I don't need it if it does not run a atty well. I love the idea of the 5+ volt output from a 3.7 battery. What are the chips that do this? Can I get one and put it in a nicostick.

Jason

It looks like the output is 450ma which is extremely low. There is a way to take 3.7 to 5v with the proper current but its a bit of work. H8ISGR8 posted this chip a while back and Ive used it in about 6 mods now.

Plug-in Power Modules - Non-Isolated POL - PTN04050C - TI.com

Property configured you can pull full current even on a 510 at over 5v and the current level is stable with the proper battery. The downside is that is doesn't work as well on smaller batteries. A 14500 just isn't large enough to handle the current drain. It works amazingly well on a 18500 or 18650.

 

[Jason365]

I was looking for a way to use my 18650's That sounds great. I can has 5 free samples? How I Love T.I.'s free overnight!

Is this the right One? PTN04050CAD
Thats the on I got, And only 1 at a time Bummer. Oh well. cant beat the price...

Thanks
Jason

 

[opuscroakus]

It looks like the output is 450ma which is extremely low. There is a way to take 3.7 to 5v with the proper current but its a bit of work. H8ISGR8 posted this chip a while back and Ive used it in about 6 mods now.

Plug-in Power Modules - Non-Isolated POL - PTN04050C - TI.com

Property configured you can pull full current even on a 510 at over 5v and the current level is stable with the proper battery. The downside is that is doesn't work as well on smaller batteries. A 14500 just isn't large enough to handle the current drain. It works amazingly well on a 18500 or 18650.

If I read the specs on this chip correctly, if you leave out the resistor it defaults to 5V? Also, could you run this with 2 14500 in parallel?

 

[Nuck]

If I read the specs on this chip correctly, if you leave out the resistor it defaults to 5V? Also, could you run this with 2 14500 in parallel?

You are correct. No resistor on the adj results in 5v output.

2 14500 in parallel would work fine but at that point you'd be better off (in series) with a switched regulator such as this:

Plug-in Power Modules - Non-Isolated POL - PTR08060W - TI.com

 

[Vay-Per Alot]

Hi Guys,

I just ordered two of these usb lights for PV modding. Any help would be great!

~Dan

 

[opuscroakus]

You are correct. No resistor on the adj results in 5v output.

2 14500 in parallel would work fine but at that point you'd be better off (in series) with a switched regulator such as this:

Plug-in Power Modules - Non-Isolated POL - PTR08060W - TI.com

Too much soldering involved for this chip compared to just a standard 5v voltage regulator. I know that seems like a stupid thing to say but it took me 6 hours to solder my nicostick properly.

 

[Nuck]

Too much soldering involved for this chip compared to just a standard 5v voltage regulator. I know that seems like a stupid thing to say but it took me 6 hours to solder my nicostick properly.

I know the feeling. I spent 17 hours on what should have been a 4 hour mod recently

 

[Scubabatdan]

Question for you guys that have this.
Does it take the 3.7 18650 and bump it up to 5.6?
Also what in the ma output. 500 or 1500? or do you know?

I would love to pick one up but I don't need it if it does not run a atty well. I love the idea of the 5+ volt output from a 3.7 battery. What are the chips that do this? Can I get one and put it in a nicostick.

Jason

Yes it has a 18650 3.7v 2200MAh battery in it. The USB port on it pushes 5.2v at 1000mA, it is smokin with a 901 or 801! If you push and hold the power button for 3 seconds you get constant power, otherwise if there is no drain in 40 seconds it shuts off. And you get a niffty little LED light attachment, which has been handy!
I use this with my USB passthrough and works great, I really dont need to mod it.
Hope this helps,
Dan

 

[Nuck]

Yes it has a 18650 3.7v 2200MAh battery in it. The USB port on it pushes 5.2v at 1000mA, it is smokin with a 901 or 801! If you push and hold the power button for 3 seconds you get constant power, otherwise if there is no drain in 40 seconds it shuts off. And you get a niffty little LED light attachment, which has been handy!
Hope this helps,
Dan

Scuba..not trying to be argumentative here but this just isn't true.

Assuming the published specs stating 450ma are wrong a typical 901 at 5.2v still requires 1.7a to sustain the voltage. Nominal voltage when not under load does not tell the story.

At 1 amp the best you will do on a 901 under load is ~3.0 volts.

 

[Scubabatdan]

Scuba..not trying to be argumentative here but this just isn't true.

Assuming the published specs stating 450ma are wrong a typical 901 at 5.2v still requires 1.7a to sustain the voltage. Nominal voltage when not under load does not tell the story.

At 1 amp the best you will do on a 901 under load is ~3.0 volts.

Hey no problems, education is a great thing, I am just reading the specs off the literature in the pack. The 901 and 801 run actually better IMO than on standard battery power. I would have to say the same as if I was connected to my computer.

I am no electrical wiz kid here, and just going by what the is in the brochure. I would love the formula you are using to arrive at the numbers you are getting. Numbers I get

Thanks for keeping me inline...
Dan

 

[Nuck]

Hey no problems, education is a great thing, I am just reading the specs off the literature in the pack. The 901 and 801 run actually better IMO than on standard battery power. I would have to say the same as if I was connected to my computer.

I am no electrical wiz kid here, and just going by what the is in the brochure. I would love the formula you are using to arrive at the numbers you are getting. Numbers I get

Thanks for keeping me inline...
Dan

Ohms law, E=IR (e=voltage, i=current)

Ohm's law - Wikipedia, the free encyclopedia

Some common resistances for the attys, keeping in mind there are clones that differ and even differences between lots are:

801 - 3.5
901 - 3.0
401 - 2.7
510 - 2.3

Since the resistance is static, the only way we can maintain a voltage is by having a sufficient current. If the current drops then the voltage has to drop to maintain ohm's law. Its why most PT's that run off a computer are weaker than the 2 bat mods.

 

[Jason365]

It looks like the output is 450ma which is extremely low. There is a way to take 3.7 to 5v with the proper current but its a bit of work. H8ISGR8 posted this chip a while back and Ive used it in about 6 mods now.

Plug-in Power Modules - Non-Isolated POL - PTN04050C - TI.com

Property configured you can pull full current even on a 510 at over 5v and the current level is stable with the proper battery. The downside is that is doesn't work as well on smaller batteries. A 14500 just isn't large enough to handle the current drain. It works amazingly well on a 18500 or 18650.

Hey Nuck, I read the pdf on this chip and if I dont put a resisttor on it it will out put 5v right. I only ask Because I am dont know much about these things.

Thanks
Jason