I`m not an electric engineer nor a programmer, so my question will be kind of nobody I guess^^
I`m am thinking about building a portable wireless-charger that is able to be sticked on a phone through magnets charging the phone wirelessly. So the battery pack would be charged wirelessly and then can be plugged to the back of a phone charging it on the go (assuming the phone is ready for QI-Charging or has a case for that).
However, the main issue for me is the micro-controller/battery board/Qi-Board part. I want to charge the battery through Qi-standard and want to charge the phone from the battery through Qi as well.What kind of micro-controllers/adruinos etc. would you recommend to build such a battery pack for wireless charging both ways, that is able to handle all the different voltages/currents and still is small? In addition it would be great if the battery would recognize when it is placed to a phone and automatically starts charging it.
Thanks for the fast reply. I‘m planning on implementing magnets into the device and into a seperate phone case that would also allow charging phones that are not Qi-ready, yet.
However, I agree that there might be some issues with magnets like interference between the magnets and the induction itself.
Any thoughts on how to approach soldering a battery, Qi-transmitter and Qi-receiver together in one device?
Chi0hmm:
Thanks for the fast reply. I‘m planning on implementing magnets into the device and into a seperate phone case that would also allow charging phones that are not Qi-ready, yet.
However, I agree that there might be some issues with magnets like interference between the magnets and the induction itself.
Any thoughts on how to approach soldering a battery, Qi-transmitter and Qi-receiver together in one device?
Not just the magnets, but the steel/iron material will also negatively influence the induction system.
Yeah, but there are magnet phone cases (for other purposes) that work with Qi-chargers. So I think that part is more about proper alignment with which the magnets could help.
However, I‘ve only seen ICs that either manage Qi-reception or Qi-transfer... I‘m wondering how difficult it is to build a PCB that can do both since I have no experience in this field at all.
Maybe a silly question but I assume you have seen things like this and this. You could connect them to the phone directly or to an off the shelf phone battery cover and let the device deal with the charging limits etc.
So I wonder how difficult it can be to build a small micro-controller device based on the QI-Standard that is capable of charging the battery and then using the energy from the battery to charge a phone, both wirelessly?
