Integrated pass through

[degnr8]

Since I discovered VV and the existence of bottom feeders it's time to build some new mods. One thing I've never figured out how to do though is build a passthrough charging circuit. I know if my batts are parallel or there's only one I need 4.2 volts, but what amperage? What voltage/amperage would I need if they're in series? I'll be using 18650s

 

[BryanM]

I have been looking about for a solution to this, as well.

Best i could find was this dna Charger at Evolv. Maybe someone else can chime in on its usefulness in a non-DNA project.

Hmmm... Maybe not for use as a pass-through... See this post.

 

[Iusedtoanalog]

Good Evening, This Is the one I use in my single battery mods > http://www.adafruit.com/products/259 You can set the output amperage up to 1000m(2xthe Evolv board output) by soldering in a resistor to match your battery's requirements. The charger can be plugged in to charge while you are vaping if you parallel the charger output with your battery +/- rather than using the in-out on the board. It wont run vaping current, but will charge while you are not pressing the button.... This is a single cell charger, so without some creative switch-wizardry(which I personally would not advise) will not be able to charge a pair of series batteries. For series batteries you should take a look at some of the rc/hobby balancer-chargers(this type could not be used as pass through) > Turnigy Accucel-6 50W 6A Balancer/Charger w/ accessories and would require special connectors for charging........ Hope that sets someone's wheels in motion. Happy Vaping.

 

[dr g]

If you are ok with the mini usb and have the room in the mod, this is a good option: 5V Mini USB 1A Lithium Battery Charging Board Charger Module | eBay

super cheap and 1a charging.

 

[degnr8]

If you are ok with the mini usb and have the room in the mod, this is a good option: 5V Mini USB 1A Lithium Battery Charging Board Charger Module | eBay

super cheap and 1a charging.

That looks perfect... never occurred to me to see if I could get one pre-made lol

 

[BryanM]

If you are ok with the mini usb and have the room in the mod, this is a good option: 5V Mini USB 1A Lithium Battery Charging Board Charger Module | eBay

super cheap and 1a charging.

Have you used a module like this in your mods? Where does the R_prog go (I was thinking in series with the battery...)?

 

[dr g]

Have you used a module like this in your mods? Where does the R_prog go (I was thinking in series with the battery...)?

Pretty sure the rprog is already on the board and already set to 1a

EDIT: rprog comes off the #2 pin, so that resistor on the bottom center of the photo on that listing, it looks to be a 1k ohm resistor which is below the minimum 1.2k ohm so i assume that sets it to max current