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Converting your Nokia wireless charger into a car charger

If you've been wondering if the Nokia wireless charging pad would make for a good car charger, take a gander at the above video. MakeIt Diy is offering a "do it yourself" guide to converting a charging pad into a car charger/cradle.

The charging pad is held into place with a Garmin Nuvi vent mount and hard wired into the car's fuse box using a "add-a-fuse" attachment that can be picked up at most automotive stores.  You'll need to glue a mounting plate to the back of the charging pad to mount it to he vent mount.

To better hold the Windows Phone in place, neodymium magnets are taped to the charging pad and inside the skin case on the Nokia Lumia 920. It's not a bad solution to hold you over until Nokia releases a wireless charging cradle for the car.

Source: MakeIt Diy/YouTube, Thanks, AK, for the tip!

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Reader comments

Converting your Nokia wireless charger into a car charger

45 Comments

The magnets won't affect the phone? I put my Lumia 820 in phone with a magnet thing came out all spasticated.
 

Wouldn't magnets on the phone mess it up? Like a computer. I have friends that fried computes from things like speakers sitting on the tower.

You do realize that there are fairly large and VERY powerful magnets inside the hard drive of your PC? The only way magnets would be an issue is if they are moving so as to generate an electric current.

This is just stupid!!!!!!
He put magnets???? how the magnets cannot affect the device?
and why he didn't buy a normal holder and a lighter charger?

You guys are just LULz... There's absolutely no negative effect on your smartphone by magnetic field from such magnets, they are perfectly safe. Your phone doesn't store your information on moving magnetic tape or disks ;-)

LCD? It wouldn't do anything.
CRT? those use magnetic fields to focus the beam on the tube, disrupting that field will disrupt focus.

Speakers and mix might be affected, small magnets are usually used to produce vibration there.

Cars output around 13.7 volts when the engine is running. My wireless charger is at work, so I'm not aware if it lists supported voltages: example 10-15 Volts. Without knowing the internal circuitry, I'd be concerned about damaging the charger and/or phone.
Edit: Perhaps a voltage regulator would help.

That's why the instructions call for an added fuse to protect both the device and the phone. Therefore it blows a 5cent fuse and not your device/phone. I am sure it will suffice since most in home outlets are ac currents and output 120volts. Car electricity is very static and it is dc instead of ac. A fuse can go a long ways.. It just has to be the right rating which is 15 from my understanding...

Vehicle fuses are rated for current with an assumed voltage range. A car's alternator will always push well over 12V when the engine is on. AC varies in houses which is why those AC to DC power blocks regulate the outgoing DC voltage. Vehicle power will spike and vary, especially while starting the engine.
The wireless charger is getting raw voltage from the car. Fuses won't help here.
Pardon my word vomit. Typing on mobile app and don't feel like reorganizing my thoughts.

You're right about the alternator pushing over 12v but all they do is replenish the battery while the vehicle is running, not sure if that changed for the newer cars more than likely it did... I do not see why a fuse wouldn't help. Fuses in cars are there to protect pricey electronic parts. Don't want to sound mean (or noobish lol) or anything but can you clarify why a fuse wouldn't work?

Yeah, the vehicle uses the higher voltage to charge the battery. But that voltage is seen by all vehicle electronics. These vehicle electronics are designed to handle that greater voltage.
It is likely that the wireless charger will not handle more than 12 volts over time. The fuse will allow the expected 13.7 volts.

I could easily make it into a wireless car charger. most newer vars like my "2005 ford escape hybrid" has a 110 v outlet so power would not be an issue. I'm just looking for a good car mount for my red 920 to attach the wireless charging pad too. Iwill upload a vid when I do it.

The hard iron (permanent magnet) distortion to the magnetic field detected by the magnetometer should be handled when you calibrate the compass. I'd guess this will need to calibrated every time you move the phone relative to the dock. I.e. The compass will be off when you put the phone in the dock or remove it.

 
(I'm the guy who made the video).
The magnets don't mess with the mapping apps at all. I've been using Nokia drive and maps without issues. I don't really use the compass for anything so that's not really a concern. The camera seems to work fine too. I was concerned about the effects the magnetic field might have on the phone's hardware, but flash memory is unaffected by magnetic fields and besides, wireless charging subjects the phone to a varying magnetic field anyway, and the phone seems to be built to handle that. So far, I've been using the case with magnets for about a week with no problems.
 
For people who are still concerned about using magnets, you can try a different method for attaching the phone to the charger. Maybe velcro might do the trick. For me personally, magnets work just fine.