I have made a little instructable about how to recycle your old phone charger by transforming it into an universal usb charger.
Really easy and cheap to do.
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Step 1: What You Need :
An old charger. (mine is a old samsung charger, not usable with anything but an old samsung mobile phone)
A DC to DC booster unit (it takes 0,1 to 4,9 v and give an output of 5 v) with female USB output. 40 cents.
A soldering iron
Step 2: Preparing the Wires
First of all, you need to cut the wire of the charger cause you don't need a lot of wire. Just let around 10 centimeter.
The wire is composed of a small white wire and of nude wire. I have put some tape around the nude wire.
Step 3: Soldering Our Two Elements
Then take the little booster unit and your soldering iron. You just have to solder the white wire to the hole where "in +" is written and the taped wire to the hole where the "in -" is written.
Step 4: Finishing
Your universal adapter is nearly done. Now you need to tape the whole thing to make it solid an unified. On my booster unit i have carefully let the led outside of the tape so I can see it's light when the adapter is plugged in, but it's a choice to make.
Step 5: What You Get in the End.
You are all done now, plug something (a smartphone, a tablet, a battery bank...) in your new charger.
No surprise here, it works perfectly.
Hope it can serve. To me it was a good way to spend some time and to don't throw an old thing, because it can stillbe useful.
Don't hesitate to post comments.