I have seen some DIY version which has three coils spread over.
WHAT IS QI CHARGING?
The Qi (Chi) is a wireless charging standard adopted by Apple and Samsung although there are other wireless standards. In a nutshell, if you have a device which is compatible with the Qi system, you can charge it with a Qi charger.
Wireless power transfer has been in existence since many years ago and in the last few years, it went into mobile phones. Some would like the convenience but for me, I am still not too convinced since I have tested a few and they are not exactly efficient. Plus, I tend to use the USB port a lot so, unless the receiver is built-in, I am not a fan.
SO, WHY USE IT THEN?
There is a problem when it comes to batteries. If you leave them in and forgot about it, it will leak and destroy your stuff. Or, you need to unscrew the cover and change the batteries some time. For me, this means worn or scratched screw heads on props or equipment and I hated that.
Mr. Duchette has done it on his TR-595E and wholeheartedly recommends it. I have always liked the Tricorder to be wireless and with the Qi system, it is now possible. When I get a decent capacity Lipo battery, I will see how effective the charging is.
MY QI CHARGING SYSTEM
There are two types of Qi receivers on the market. The first version is with the coils and its PCB exposed, where you need to solder the wires. The second is a same as the first but ‘packaged’ so that you can stick it to your mobile phone. This version complicates things a little because the ends of the wires terminates into different version of USB connectors. You will have problems if your mobile phone uses the micro-USB and you forget its orientation.
The Qi Transmitter or Charger also comes in two forms. You can get it ready made or as a DIY component. The latter of course, opens up a lot of potential. You can install it into special casing or stands to charge props.
The only consideration is the maximum charging distance and the non-metallic material that lies between the charger and the receiver. In my case, I have a foldable Qi charger and a DIY Qi receiver coil.
THE VIDEO
The Wiring Setup
The Qi system setup is quite simple. Basically, you need the following items:
1. Qi Transmitter,
2. Qi Receiver,
3. LiPo charger module, and
4. LiPo battery.
