I think this is a very common style that is available from many sources. The circuitry is very typical of QI chargers. It pulses the output until it gets a response from a compatible device, and then transfers power inductively to the device being charged.
QI devices are notorious for their inefficiency and the need for good alignment for optimal charge transfer. But the huge advantage is the convenience of charging and the lack of wear and damage risk to a traditional charge connector.
The control chip is a mystery. I've a sneaky feeling that it's a 16 pin microcontroller with a bit of clever software to deal with the communication and coil driving via a MOSFET H-bridge.
It will also be determining the type of power source it's plugged into by measuring USB data line voltage levels.
Since the operation involves communication, it's possible that it's a microcontroller with dedicated QI charging functionality, since that would make it easier to implement the comms and adapt it to an evolving standard.
The unusual wire coil is Litz wire used for very high frequency applications to minimise the skin effect of current preferentially flowing at the surface of a conductor at high frequencies.
It's basically a bundle of thin insulated wires with a very thin sleeve to allow a tightly spaced coil.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
QI devices are notorious for their inefficiency and the need for good alignment for optimal charge transfer. But the huge advantage is the convenience of charging and the lack of wear and damage risk to a traditional charge connector.
The control chip is a mystery. I've a sneaky feeling that it's a 16 pin microcontroller with a bit of clever software to deal with the communication and coil driving via a MOSFET H-bridge.
It will also be determining the type of power source it's plugged into by measuring USB data line voltage levels.
Since the operation involves communication, it's possible that it's a microcontroller with dedicated QI charging functionality, since that would make it easier to implement the comms and adapt it to an evolving standard.
The unusual wire coil is Litz wire used for very high frequency applications to minimise the skin effect of current preferentially flowing at the surface of a conductor at high frequencies.
It's basically a bundle of thin insulated wires with a very thin sleeve to allow a tightly spaced coil.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
I need to start a wish list of the tools you use, that clamp is super useful. Not to mention the usb power monitor 😊
I had an intermittent no start in a 2009 Chevy Malibu. Had history anti theft codes. Couldn't duplicate. I noticed a wireless charger. I put a phone on it before cranking and duplicated symptom. You got to get into customers head. First thing someone does is throw their phone in charger then try to start. The frequency must have matched the RFID chip in the key head frequency. Educated customer to start first, then put phone in charger.
The wife got me one of those chargers from wish back in 2018. I had to stop using it as it caused my phone to overheat.
pick and place machines are extreamly safisticated the only diference with the lower end ones and the higher end ones as far as I'm aware are the higher end ones have more advanced firmware though electronics hardware engenering is only my hobby so take my word with a grain of salt if you catch my drift
Do you use horse hair brushes with IPA and Denatured?
Sounds like a common method of hiding the real part number. They sand it off. The only way to identify it is to completely reverse engineer the ic.
By the way, a triangle pointing up is the symbol of common tie point, usually meaning vcc or vdd. Grounds are shown differently based on what ground you want. One horizontal line with 3 additional lines going down and left is earth ground. 3 horizontal lines getting smaller as you go down is circuit ground.
Teflon coated wire. Could be kynar or tezfel
uhm yeah well muffy …..
nice…
Hi Clive! I’m at uni and I’m doing aerospace engineering- electronics is a mandatory course and I really haven’t enjoyed it and have struggled. Your videos are teaching me more and more about component functions and they’re very interesting! Thank you :))