Keep away from WAVGAT brand. The boards coming from WAVGAT are fake arduinos (fake/wrong chips) and is not supported. Gamepad features (buttons, encoders, buttons matrix will only work with arduino ...

Lots of setups should work stock with the arduino usb powering, but you may need to add an additionnal 5V power supply if you go above the 500mA power consumption limit Connect the ground to the ...