Instructables

Home 110 to Car 12V

This is my first instructable. This lets you use a 12volt car plug-in at home, using a 12V plug (wall wart). The initial steps are how to do it for free with stuff around the house, You can make a cleaner one from bought parts. The only thing I an unsure about is the MA (mili-amps?), I have had no trouble using my adapter on any car powered device, but I am not responsible for any problems, broken devices, electric shock, etc. (anything).

If you see any problems, I will never be too proud to make any necessary adjustments
 
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Step 2: What You Do

I would recommend doing all this with the "wall wart" unplugged (especially those with heart problems).

Take the wire from the 12V adapter, and cut the wire just before the end of the cord (where you plug it into something).

Next strip the covering off enough wire to connect it to the car adapter.
(Note: the end contact will always work, but only one of the side contacts works (usually)

I connected the positive to the end contact and the negative to the side contact.

NOTE: You can also buy a car adapter cup, (positive for the middle, negative for the outside contacts) for clean reuse, less resistance, and less strain on the devices. Then clean-up everything with electrical tape or shrink wrap. (the importance brought to my attention by LasVegas)
This method Extremely encouraged for those with any heart problems.


buteman4 years ago
Glad to see you are trying things but I would really suggest you do battery powered stuff before you get onto mains stuff because it can be VERY dangerous if you do not fully understand what is going on.

Here is some information about this project for you to consider that you may not already know about.

Your wall wart has a power rating for example 12 volt 300 mA and if you try to connect a device which needs more power than this one of several things might happen.
1/ If it has over current protection it will shut down.
2/ If it hasn't it may overheat and even catch fire.
3/ The device might simply not work because it is trying to draw more power than the wall wart can supply which will result in the voltage dropping too low.
4/ If you had wired the lead so you had the plus and minus the wrong way round you could have damaged either the wart or your device or both.
If you get more ideas might I suggest you post a question on the answers forum so others can advise before you try it? Don't want you to have an accident.
joinaqd5 years ago
omg i did this when i was 5 years old!!
you did?
static5 years ago
Notes; 1. does appear that the fuse protection with the charger plug was defeated, With that defeated, any reverse polarity protection was defeated. Dumb luck may or may nor prevent damaging the charger by hooking up the wires one way and then the other if the first way didn't work. 2. Generally the wall wart shows the polarity of the plug, with a VOM or DMM you can then determine the polarity of the wires. 3. get a VOM or a DMM they are really inexpensive and will pay for itself. 4. Learn to solder or at least buy an assortment of small wires nuts to use with simple projects like this, or both. 5. Even if you let out the smoke in a few things along the way, you are on your way to be becoming an electronics hobbyist and or a hardware hacker. Do find yourself a mentor who you can ask questions of. 6. ALL of use here where novices once and still may be in some things.
LasVegas6 years ago
Better option... Go to your local Auto Parts Supply and pick up a replacement auto lighter outlet. Connect it to the wire from your Wall Wart and seal it with electrical tape, shrink tubing or epoxy. Then you have a safe port to plug the charger adapter into.
TK (author)  LasVegas6 years ago
That is an option I had thought about and is listed in my instructable.
LasVegas TK6 years ago
IMO, you should have done it that way rather than mentioning it as a possibility. It's just wrong to instruct on how to do something the wrong way. Bare wires twisted into place introduces added resistance (heat), a danger or shorting and potential damage to the electronics due to either of the aforementioned dangers.
Damn, you are just ragging on everyone. It's just a quick and useful hack. Give him a break.
Vegas is right its quick but not too safe he's just trying to help lesson in life - never take anything too seriously
TK (author)  LasVegas6 years ago
I understand your comment and have added this to my step 2 ( the building it step), to address your concern.
josh921766 years ago
This would work in any country you would just need a wall wart for the voltage in that country, however your one would work in any country (that I know of I think they are all between 100 and 240v).
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