Using a USB-C phone with Power Delivery is ideal here, as it allows the phone to be powered while also communicating with the Arduino over USB. The RemoteXY app is built specifically for this purpose.

At this point a diode may come in useful to save the arduino from a possible EMK kick, but not essential. Apple’s WWDC 2025 takes place June 9-13. You’ll find in-depth coverage from our sister ...