I'm working on a project consisting of a Nano 33 IoT and an MFRC522 board. The idea is that different RFID cards will represent different songs, and when an RFID card is presented to the reader, it'll trigger playing that specific song from Spotify through WIFI on one of my Sonos speakers in the house.
At the moment, it's in a breadboard phase, and I'm powering it simply through USB from my computer, but I'd like to put the boards in a cube-shaped box, and turn this into a portable device.
I'd like to power it from a rechargeable battery/powerbank, where I'm able to simultaneously charge the battery and power the device. I'd like to make it so that the battery is wireless (Qi) chargable.
So basically the use-case is the following: my kid starts using the device, dances around with it in the room, then puts it back onto the wireless charging mat while she keeps playing with the device, then she picks it up again, etc. The device should be able to operate the whole time, and also charge the batteries whenever it has a chance (when it's on the charging mat).
I looked at many tutorials and articles on the topic of how to power an arduino from rechargeable batteries, I also found some less detailed mentions of charging circuits that can solve the simultaneous charging and powering problem. However most of the articles I found were focusing on Arduino models with 5V power supply, they did not mention concrete parts like charging circuits which I would need for such a project, and I did not find any article on wireless chargable battery powered arduino projects.
Could someone help me out with some pointers or advice on how and where to start educating myself on this topic, please?
I agree with @Juraj but just in case you want to stay with Nano 33 IOT you should add a battery charge an discharge control board to allow your arduino run while is charged
there are many options and qualities of board capables of doing simultaneously charge and power arduino
I share my experience in two battery powered projects that are running smoothly
one with continuous Charging connection that uses battery as backup power.
(this is realy important to keep the battery out of the limits)
and the other with complete charging and discharging cycles between uses
I've used this module many times with success, but it's necessary to have it from a known quality source:
or even this :
with usb-C connector (allmost the same circuit)
as these boards made made by several fabricants , not always with the same quality control.
advantages :
realy not expensive board
simultaneous charge and use
battery overcharge and over discharge protection
battery level leds
on/of switch key (it can be used control the power on/of of your device)
considerations:
some vendors are poor quality
maybe its necessary to use an output capacitor to avoid power breaks when switching between charging and battery
there is also an adafruit circuit but really not cheap: