I have built a battery level indicator and have tested with a 12V battery Would it harm my arduino board if I connect a 48V battery? - Arduino Stack Exchange
Battery Display Red and Green Battery Style Digital Tube LED Battery Level Display Module for Arduino|module for arduino|module ledmodule battery - AliExpress
Music Reactive LED Strip with Microphone Module - Arduino Project
Music Reactive LED Strip with Microphone Module - Arduino Project
LED Bar Green Strip 10 Segment Strip Digital Tube Light Emitting Module Battery Level Display Module For Arduino|module for arduino|module ledmodule light - AliExpress
Battery Display Red and Green Battery Style Digital Tube LED Battery Level Display Module for Arduino|module for arduino|module ledmodule battery - AliExpress