This is version 2 of my 12V E-cig for cars or what ever with a 12V socket (Link to old version).
This version has variable voltage, so no messing around with those power resistors and calculations (Old vers).
Because those DNA 30,40 and other Vape Chips cost so much compared to this simple circuit, and they're not designed to work at 12 Volts, I've used a 15A DC/DC Step Down Converter as the "Chip"
This circuit has 15 Amp fuse so it's pretty safe to use, and I have not been able to get the circuit even warm. but I won't be taking any responsibility whatsoever!
You should check your cars manual or fusebox for what Amp fuse your cigarette/accessory socket has and use this mod in its limits!
You build and use this at your own risk.
With a Step Down converter I can adjust the voltage all the way from 12V down to 1V.
This mod has no fancy screens to show you the exact voltage or wattage, but if you want you can always measure the voltage with a multimeter and calculate the wattage!
example: 5 Volts(U) with 0,5 Ohm(R) atomizer. It would draw 10 Amps(I) and give you 50 Watts(P).
Step 1: Tools&Components
• - Soldering iron + solder
• - Hot glue gun or epoxy
• - A drill and drill bits
• - side cutters and pliers
Components you are going to need
• - 12V cigarette lighter plug
• - Something to replace the old fuse in the 12v plug (not cars fuse) as 3A or what ever the old is, may not be quite enough.
• - DC/DC converter (I used 15A 4-32V to 1.2-32V Step Down Converter from Ebay)
• - A project box
• - Wire that can handle some current
• - a switch (push button) that can also handle some current
• - IRLB3034PBF Mosfet (if you want to use any switch you want)
• - 510 / ego thread
Step 2: Circuit
I decided to put the switch to the input of the "chip" so it has power only when the switch is pushed.
Connect the positive (positive is the pin) of your 12V plug to the switch and from switch to the + input of your Step Down converter, negative Straight from the plug to the - input of the converter.
Now connect the + and - output of the converter to the + and - of the 510 connector (positive is the inner pin).
That's about it!
Step 3: Box&Finalizing
Please don't make the same mistake as I did and use hot glue on the 510 connector, Hot glue is not strong enough to keep it in place when inserting and removing RDA top caps etc. use epoxy!
Make a knot to the end of the power cable to act as strain relief and use some hot glue or epoxy to secure everything in place
If you're using a simple plastic box like I am, use some paint or some carbon vinyl wrap like I'm going to do to give my box a nice look.