Help needed: Building a QI charging TOH [answered]
asked 2015-08-07 14:22:29 +0300
What I did:
- Buy a wireless transmitter (1500 mAh) from china.
- Buy a wireless receiver (800-1000 mAh) also from china.
Now to the prototype: First I removed the sticker on the side facing the TOH:
Then I glued everything in:
Finally I added some pads made from aluminium foil:
First test with red cable facing to the middle, black the border: Phone crashed instantly. So I exchanged the cables. Second test: Charger tries to charge but phone doesn't do anything.
So before I do anything further I first want to know which cable has to face which side. I guess the second test was good (first short circuit) but the pads are bad (remember: Just a prototype) ?
(for your wires if the colour-coding is correct - black is usually GND-, red is usually plus+)
https://jolla.com/the-other-half-developer-kit/
There you will find details of the various pins on the Jolla, and what they're for.
r0kk3rz ( 2015-08-07 14:41:56 +0300 )editDo not use aluminium foil, usually it has an oxide layer and it is not a very good conductor. It adds resistance on both side, cable -> foil, then foil -> power pins.
Instead of aluminium foil use brass that You can solder the cable to.
Macilaci457 ( 2015-08-07 15:48:37 +0300 )editAluminium will be good enough for testing though.
Giacomo Di Giacomo ( 2015-08-07 16:08:53 +0300 )edit@Macilaci457 Again: proto, final design will be better (don't know how exactly but time will tell).
V10lator ( 2015-08-07 17:26:02 +0300 )edit