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[MOD] Wireless Charging With Case for hTC One XL

OP nerdo

29th December 2013, 12:30 AM   |  #1  
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Wireless/Inductive Charging With Case for hTC One XL/Evita

Here is a simple mod I did to wirelessly charge my One XL/Evita
This doesn't require opening your phone, will therefore not void your warranty.
It can be used basically with any snap on case.
NFC works fine with mod

YOU DO THIS AT YOUR OWN RISK
I AM NOT RESPONSIBLE FOR ANY DAMAGE IF YOU
DECIDE WILLINGLY TO APPLY THIS MOD TO YOUR PHONE.


Requirements:
1. pencil, paper, tape & ruler
2. soldering iron preferably with a fine tip
3. copper foil adhesive tape, width ≤ 5 mm
4. restover thin cable (width ≤ 1 mm), will use this to make prongs/pins
5. thin transparent plastic sheet (from any old packaging material), to make extension platform
6. thin wireless charging receiver card (qi standard)
7. an avometer is handy if you have one
8. thin double sided tape keeps things tidy
9. Dremel tool if you have one, to grind pins
10. basic drawing and soldering skills



You will of course need a wireless charging pad.
I went for "qi standard" due to availability and reasonable pricing.

Method:
1. draw your phone on paper with receiver card superimposed, lines where 2 copper foil paths will run between contact points on card and the 2 outer pogo connectors.
Note: upper pogo connector is positive and bottom is ground.



Tip: you can lightly tape paper to phone and rub pencil where pogo connector is to give you an imprint of all connector points

2. cut transparent plastic sheet big enough to cover positions of card and pogo connectors on paper. Tape it lightly to paper and draw the lines on plastic with fine permanent pen.



Notice polarity of both card and pogo connector as in pic

3. you need to remove prongs from charging receiver card by carefully and shortly applying hot soldering iron and either push with solder tip or grab with tweezers.
after this you can lightly tape card to plastic sheet within it's drawing, blue side facing paper and white facing up.



4. cut the copper foil tape into 2 equal strips, each was about 2.5 mm in my case.



5. making pins/prongs was the most challenging part. Strip about 1 cm of thin cable and spread some solder on it just enough to make it solid, then cut in half. You can check at this point if they fit comfortably in your phone's pogo holes, may need a bit of grinding.



6. now carefully solder those 2 pieces of solid wire to ends of copper foil strips while taped on paper, it's better to shorten them after soldering, I had to use my Dremel to grind/dull the edges a bit.



7. tape copper foil strips to plastic sheet along drawn lines, use imagination and fine tweezers to bend foil strip at 2 corners, solder strips to 2 points on card. Plastic sheet can be trimmed to suitable size at this point.



8. if you have an avometer you can check if your connections are intact



9. now place the whole thing on phone aligning pins to appropriate outer pogo holes, small piece of tape should be adequate to keep it in place, snap on your case and slide your phone onto the charging pad!




I need to grind my pins a tad shorter!


Video of my phone charging wirelessly!



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29th December 2013, 12:32 AM   |  #2  
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How to mute Koolpad wireless charger
Some useful pointers for those interested:

- wireless charging receiver card (for S3) I used didn't interfere with NFC functionality
- this mod works fine with my other HOXL cases, the one above is the thickest though, melkco Premium Leather snap cover
- charging time, averages 10-13% in 1 hour, adequate for overnight charging or desktop topping up
- battery/card gets a bit warm but not hot

Koolpad qi wireless charger
As pictured above is not cheapest around, but it had good reviews.
charging distance 8mm
current 500mA-700mA
doesn't overheat
not very pedantic about how you place/align mobile for charging to start
can be draw power from any USB source (mobile charger, PC, laptop)
doesn't come with own power supply, guess one less to worry about

Muting Koolpad:
The only downside was the beeping it makes when starting charging or if phone not aligned properly.
Fortunately this can be solved by muting the charger in simple following steps:

1. disassemble unit by removing 4 rubber legs and unscrewing 4 screws beneath them



2. this square structure circled in pics below is the beeper which you need to pop open carefully




3. now remove the metal disc in pic and close beeper without it



That is it, assemble the charger pad back and it won't make a beep

BTW I did tape the metallic disc to the inside of the charger before putting it back together, just in case!

Good luck!
Last edited by nerdo; 1st March 2014 at 05:18 PM.
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29th December 2013, 08:32 AM   |  #3  
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Quote:
Originally Posted by nerdo

reserved

I'll add some info on how to mute annoying beeper on Koolpad
plus where I got some of the stuff I used in the mod

Good luck!

Awesome. I'm looking through my stuff and I'll probably order some things and dust off the soldering iron. This is awesome. Thanks!
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18th January 2014, 06:14 PM   |  #4  
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Thanks for the guide
Thanks for the guide just finished building the wireless charger, you where right the hardest part is getting the wires right for the pins.
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23rd February 2014, 07:38 PM   |  #5  
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I for one think this is awesome and appreciate the work that's gone into it. Well done.
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28th February 2014, 03:26 PM   |  #6  
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I actually just picked up a fixer upper HTC One X and was planning on doing this mod internally. Didn't think about using the contacts on the back of the phone. Thanks for that idea. If I can get this phone working properly, I will definitely be wiring it that way instead of directly to the usb port or components near it.
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1st March 2014, 05:28 PM   |  #7  
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Quote:
Originally Posted by timmaaa

I for one think this is awesome and appreciate the work that's gone into it. Well done.

Thanks mate, you are a very helpful XDAer, hard to miss your input in these forums

Quote:
Originally Posted by xxcrashxx

I actually just picked up a fixer upper HTC One X and was planning on doing this mod internally. Didn't think about using the contacts on the back of the phone. Thanks for that idea. If I can get this phone working properly, I will definitely be wiring it that way instead of directly to the usb port or components near it.


Well, I had the same thought initially but I have about a year on my warranty and don't want to void that just yet!
saw different (internal) mods on different devices plus how the newer Samsung devices offer a possibility for a clip on of a receiver card!

I am planning on doing an internal mod for my 1st gen N7, when I get the time.

Second post updated BTW with how to mute Koolpad wireless charger
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14th March 2014, 07:51 AM   |  #8  
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thanx.
14th March 2014, 08:24 AM   |  #9  
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Quote:
Originally Posted by wxw331

thanx.

Please press the thanks button instead of writing thanks, it's the proper way to show gratitude on XDA.

Sent from my Evita

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Tags
htc one x, htc one xl, wireless charging qi, wireless charging receiver, wireless charing htc one xl
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