This has the benefit that it can be readily driven by a microcontroller in much the same way as the familiar HD44780 character LCD ... display to become a surprisingly-responsive VU meter. An ...

The ElectroSmash website has featured a new Arduino Audio Meter which takes the form of ... anode” matrices are used creating a 16×16 display. Four MAX7219 chips are used to drive the matrices.

Measuring equipment such as SPL (Sound Pressure Level) decibel meters may seem daunting ... targeted by the prototype setup. The display is a graphical LCD type, capable of displaying the text ...