Introduction: USB to 12v Molex External Adapter/converter

Step 1: Stuff You Need

Step 2: Wires, Cables and Cutting

Step 3: Solder on Soldier

Step 4: Your Done


LifeWarrior (author)2010-07-01

You would need to build a step-up circuit to get the 12v from a 5v source, here's a really good diagram of the circuit at: Without digging into it much more, screw around with the config of your circuit to get the 5 and 12 and the two ground on the 4 wire molex... I'm not sure if it would stay real reliable but that should get a drive to spin up! Not that it's real useful to me right now to build one but would be cool to see the results in your v2. I say cool start, might replace my bulky wall plug one for your v2 if it works!

Berserk87 (author)2010-06-20

the only use for this cable would be to run some fans off of usb.

Bongmaster (author)2010-06-20

since you are only using the 5v lines on the molex the mentioning of 12v should be ommited really.. since you will never get 12v from 5v usb. and u wont be powering a hdd from it unless its a laptop hdd (5v) since a 3.5" hdd uses and needs both 12v and 5v lines.

MaruaderFox (author)Bongmaster2010-06-20

yeah... I have no idea what you said and remember It's a V1 in development and I'm a noob

lemonie (author)MaruaderFox2010-06-20

You only get 5V from USB: that's half a Molex and pretty much useless, because 5V cabled-devices tend to be USB anyway.


HarveyH44 (author)2010-06-20

Where does the 12 volts come in. Little let down, that this is just the 5V coming off the USB, but then again, didn't see getting much current @12v if there was a boost converter involved, maybe 200 mA.

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