Im using 3.7v battery, 2 buttons & rgb leds.
Ive loaded fonts & config.ini onto sd card.
I then upload PBSaber.ino from PBSaber_v1.0.0 file through Arduino 1.8.9
With usb still connected, it all works. Buttons, sound & leds.
However when I disconnect the usb cable, nothing works anymore.
Ive tried the process several times.
Both with or without usb connected I get 3.7v at battery connections, 3.3v at the two 3.3v pins but only 0.08v at 5v pin.
I don’t actually know what I should be getting at 5v pin as only using 3.7v battery.
Any ideas what I am doing wrong please.