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In this Instructable, ill show you how to make yourself an cheap usb car lighter .

Step 1: Materials

MATERIAL NEED :

1) Solder Iron with iron

2) Screwdriver (+)

3) Integrated circuit LM7805cv

4) USB female socket

5) LED (any color)

6) 2.7k Ohm Resistance (or higher)

7) Cigarette lighter Adapter PLUG

Step 2: MAKING


Follow The 2 schemes for make the adapter.


LM7805 pin :

1 : IS THE INPUT (12V) FROM THE BATTERY CAR. !! PAY ATTENTION DO NOT MAKE SHORT CIRCUIT !!.

2 : IS GROUND FOR ALL !

3 : IS THE OUTPUT (5v) ,PLUG THE USB SOCKET AND LED <- with resistance first.

LM7805 DATASHEET :

Click here (PDF)

Step 3: RESULTS

THESE ARE THE RESULTS .

In the image the central pin of LM7805 is detached for dont do short circuit !

Using a linear regulator to stepdown 12volts to 5volts ! Dissipates lot of heat!!
<p>Yes ,make most heat !</p>
<p>Slooow charger.</p>
<p>Try to remove the led </p>
i would add a larger cooler to the 7805, otherwise it gets rearly rearly hot and burns out/desolder itself! A better solution could be to use a switching regulator. It's all so strange, that you device, because normaly you need to connect the D+ and D- pins to activate the charching mode.
<p>Yes,maybe it can be modified, in 10 min burn yet ! </p><p>Current is only 0.25 A !</p>

About This Instructable

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Bio: Electronics everywhere !
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