Magnetic Phone Holder for Car.

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Introduction: Magnetic Phone Holder for Car.

I wanted to put my HTC Hero on my new car but I didn't found a phone holder that fits with this phone due it's a little curved where the buttons are. I've already found a good car holder, but a little expensive (19€). It's a magnetic holder made by an Italian company:http://www.tetrax.com/en and taking the idea of a magnetic holder I decided to make it by myself.
The result is a magnetic car holder that fits with any phone with a battery cover (sorry iphoners) and in any position without making any hole and with a very powerful magnetic strength.

Materials:
- Old hard drive or flat neodymium magnet.
- Cutter blades.
- Double side tape, thick for place the magnet in the car, thin for place the blades in the phone.

Let's start:

Step 1: Get the Magnets.

I've disassembled  and old 3.5" hard drive and there are two neodymium magnets to drive the reading arm. To detach it from the metal plate you can bend this support with two strong pliers, it will pop out due it's only glued. I've used the two magnets together due the magnet force its higher. It's not necessary to glue them, they are magnets!
Be very careful with this magnets, they are very strong and you could hurt a finger by placing it in a metal part, or you can delete any credit car near them.

Step 2: Place the Cutter Blades.

I recomend the little ones, but you can use any cutter blade or thin material with iron. To help putting the blades you can fix the magnet by some tape behind the cover, the blades will be attached in place in the better position almost alone due the magnetic field. I recommend to put the blades in the same position than the phone will be. If you will use the phone mostly in horizontal  then put the blades like this, but if you will put the phone in vertical then put the blades in vertical. Adjusting its size is easy, due you can break the blade to the size you want.

Step 3: Double Tape on the Blades

I've put a thin double side tape, but you can put a little balls of blue-tack or even a soft glue. This will fix the blades to the battery when you close the battery cover.

Step 4: Testing the Magnet Holder.

Once the phone is closed with the blades inside to see the results you can put the magnets with a thick double tape in any surface and test the behavior. You will notice that the magnets are very strong so be very careful when place the phone. The magnets must be very clean, if the chromed surface of the magnet is gone then put some tape over to avoid scratch the phone.

Step 5: Put Magnet in the Car.

Choose the better position for the magnet in the car and fix it with a strong double side tape. You will have the most easy, effective and comfortable car phone holder ever!!

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    19 Comments

    self adhesive magnets available on amazon for couple of pounds.

    So why doesn't the magnet hurt the phone, espeically the SD card?

    For the same reason it won't affect a glass of milk.

    They aren't affected by magnetic fields...

    I've been doing almost the exact same thing for 3-4 years. I made custom fit metal plate that covers most of the back of the phone. Like protoman says, the only thing affected is the compass. I have even tested the compass almost a year. without the metal back on it everything works great. No long term effects. The neo magnets from a hdd are strong enough that I never have to worry about the phone falling off. I can almost throw the phone up there and it will catch it. No fumbling around trying to find your mount. When you aren't using it for the phone, the charge cord will happily hang there.

    One thing I would add. I cut a piece of rubber from an old bike innertube, and I super glued it to the magnet. I then trimmed it with a exacto knife. It gives the phone a little protection from scratching. It also give a little better look than just the shiny magnet.

    If you use the household/plummer/marine goop glue, it will cleanly remove later if you wish. You just have to tape it in place for a day or so so it will set up.

    I also made desktop cradle with round neo magnets and a piece of heat bent lexan. Drill some holes in it and recess the magnets. Cut out a piece of innertube and glue over the magnets.

    2010-03-12 21.03.42.jpg04-01-10 023 (Small).JPG

    Thanks for the results of the long term testing. I only have it mounted from 2 months ago but I don't see any future problem with SD or screen like some people say without thinking about it first. The only problem is that I'm detecting a little magnetization of the blades (not enough to hold a clip). This could be a problem due the compass will be wrong all the time, it happen to you also?

    Yes, the compass is pretty much useless as long as the blades/metal plate is present. Good news is if you remove the metal, nothing is permanently damaged. The compass will calibrate and continue on like nothing happened.

    To answer a couple people here, SD cards are not a magnetic medium. They are solid state circuits. Magnets do not effect LCDs either. Hold a magnet up to your LCD monitor. (carefully) there is a metal shield on the back. It will attract to your magnet and you could break the glass front. (strong magnet)

    The accelerometer is not affected either.

    Nothing to stop you from buying a second hand back phone case and fit your metal to the inside of that one. Keep it in the car and swap if you want to 'stick' your phone to the dashboard.

    It would mean no problems using your compass out of the car too.

    My initial thought was with the blades. Imagine what TSA would do to you if they ever caught those while trying to board and aircraft. Hope you don't have any allergic reactions to latex cause it's gonna be a long day.

    If you do, just ask the nice people to use nitrile gloves. This wouldn't shorten your day though...

    I thing you should check your gsm signal after doing it, because it can cause lower range of signal...