Wireless Qi Charger Stand by DaIceman

Last crawled date: 3 years ago

Well I originally bought a Samsung Wireless Fast Charge type 2 stand (the black circular one) for my S7 Edge - worked fine and all but basically the phone is all over the place and won't sit where it should when you lay it down too hastily. If you're not careful especially if you have a phone cover on you might put it on the charger and it won't start charging as not in dead center. Being a circular design you have a hard time putting it dead center. Anyhow I decided to make one myself with a proper recess to hold the damn thing in place! So here it is, nothing special but certainly centers the phone muuuch better than the 90$ Samsung one (yep that's the original price and model, many clones around)! Yes it's less stylish and all, just a basic square holder but it does it's job as it's supposed too and it's practically free;) You only need to buy the Qi wireless charger board and induction coil (sold as one piece) for a couple of bucks from China and you're all set.
Print the top and bottom seperately, I suggest printing them with the open part face up and the closed surface facing down on the print bed for a smoother visual finish. Then just trim the pieces properly and fit them, it's a tight and snug fit so you don't need any glueing once you trimmed. I printed them in transparent ABS, 10% fill.
The QI Wireless charger I bought is like this one:http://www.ebay.it/itm/Qi-Wireless-USB-Charger-PCBA-Circuit-Board-/272358905881?hash=item3f69db1819:g:fwMAAOSwFdtXxTlH
Payed it less than 2 Euros with shipping (bought 6 of them and they all work flawlessly). Red LED not charging but powered, blue LED charging or phone detected. Does not indicate End Of Charge, so the blue LED will stay on until the phone is removed (what else do you want for under 2 dollars?). It's not Fast Charge, but it will charge approx up to 800mAH nicely which is decent enough for the price (total current absorbed over 1Amp so be sure to have a decent USB charger rated OVER 1 AH. In any case Fast Charge 2 really kicks in only when your phone is under 50% charge so there is no real big deal about it in ordinary conditions (I don't let my S7 cell get under 60% anyhow).
You'll have to extend the charger induction leads about 5cms each. Use good quality multistrand silicon wire as an ordinary low strand wire will have more losses at that frequency. Simply unsolder, extend, insulate with shrink tubing the joints and resolder. This is the only mod you need to do to the original charging + induction assy. Please twist the wires then lead them through the tunnel, this will also reduce some losses and noise interference. Fit the charging LED in its tunnel, bend the legs slightly to fit it properly. You can trim away some part of the top support if it invades the charger PCB area too much to creat a recess for the wires and LED to fit through. I used a bit of double sided tape to keep the pcd in place fitted on the component site. The MicroUSB connector should fit flat on the surface as I made it so that it is in the center for the plug, just center the sides before you stick it: hint plug a microUSB connector it in so it auto centers before sticking.
Last but not least, stick 4 rubber tabs underneath it so it won't move around.
Oh, of course you can use it just as a simple stand for your phone if you need one - no need for the wireless pcb for that;)
Have fun and cheers!