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Make a USB phone charger for almost any cell phone!

My charger burned up, so I thought,"Why not build your own?"
 
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Step 1: Get the parts:

Picture of Get the parts:
1. Altoids tin.
2. Old wall/car charger that fits your cell phone.
3. Male USB.
4. 220 ohm resistor (red-red-brown).
5. LED (color is up to you).
6. Power Switch.
7. USB extension cable (just in case you can't fit the USB plug directly into your computer).

SIMPLE, HUH?

Step 2: Connect the dots...

Picture of Connect the dots...
Now I'm sure most of you know what the leads on USB ports look like, and how all you will need are the 1st and 4th leads (Red, that's your positive 5V, Black is the ground). Just cut of the white and green wires if you have them, if all you have is the metal male USB part, then you just solder wires to the first and last leads. Now connect the positive wire (negative will also work) to your power switch. Then from the other wire on the other end of the switch, connect one end of the 220 resistor (a higher resistance would also work, it just depends on high bright you want your power light to be). And from that connection between the wire comming from the switch an end of the resistor, also run a wire directly to the positive (red) wire comming from the cut-off end of the charger (you just need the side with the adapter that plugs into your phone, it should only have 2 wires, (+) & (-) ).
would this work with a i phone 3g
Not with an iPhone 3Gs or 4. On those phones, the USB data pins need to have a voltage on them. D- should be 2.0V and D+ 2.9V to make the phone charge in high speed. If your wall wart is less than 800mA, you may want to have the phone charge in low-speed mode, with both pins at 2.0V. Ladyada, maker of the mintyboost, goes over this nicely. As well, this dude: http://tzywen.com/modules.php?name=News&file=article&sid=696
it doesnt matter, this is the same as the apple usb cord but this has switch and light.
talha913 years ago
if u can make two terminals positive (+) and negative (-) which can be easily attach to your cell phone`s battery so u can recharge any kind of cell phone battery but be sure your cell phone battery gives output of not more then 4 volts because to recharge the battery u must need more volts then it deserves 5volts are enough to recharge a normal cell battery (now a days cell phone`s are using about 3.6 to 3.7 volts)
yay finito
roughwirez (author) 6 years ago
No. The resistor is just for the power LED. You can completely leave out the resistor, and LED; and hell, for that matter, you wouldn't even need the power switch! Just make sure that YOUR phone charges of 5v! If your phone charges off a 12v charger, then you would need a step up regulator. (less than 5, a step down regulator.). So yes, if you have the power cord, all you would do, is simply connect the red to pin 1, and the black to pin 4! BUT PLEEZ, CHECK A WALL WORT TO SEE WHAT IT USUALLY RUNS ON!
o if its none volts can we use like a bunch of batteries like a separate battery holder
Lambeau6 years ago
Can you just connect the male USB to your phone charger cable? Or do you need the resister and stuff.
Derin Lambeau6 years ago

look at post under this post

roughwirez (author) 6 years ago
Correctomundo! I was thinking though about maybe putting in a filter capictor anyway, But I do think that I'll try just making it portable, with batteries inside it next time. This was a 'sample' version, as with any project, they just get better with experience!
therian6 years ago
"almost any cell phone" today have mini USB and can be charged directly from usb. Altoids, especially this one looks too big, I doubt that you will find place in you PC where you can plug it in. And if it is capacitor in the center then Led connected wrong, in best case it will light for few seconds what the point of switch ?
it's not a capacitor. it is to show that the wires that cross each other aren't connected. the LED is running in parallel and the switch is there so that the operator can control how long their phone is charging for.
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