I have this remote: https:///collections/remote-controller/products/torqueboards-2-4ghz-mini-remote-controller
It runs on two AA-batteries in series (1.5V *2 = 3V). I want to make this rechargeable via a usb-port so I wanna stuff a lipo battery inside it
I have a 1S 500mah lipo with a built in bms that I wanna use for this. The maximum voltage is as you all know 4.2V so i guess I’ll have to step it down to 3 or 3.3V in order to use it with the remote. I then have to add a USB-port and step down the 5V from that to 4.2V to charge the battery. I also need to limit the current here to 500mah to charge the battery at 1C.
Can anyone help me with where I can find the step-down converters? I know some electronics but I’m far from an expert! If you know of any parts that can help me with this or if you have a better idea or solution, please let me know!