Looking for a digital recreation of the classic analog volume unit (VU) meter? If you’ve got an Arduino, a few passive components, and a SSD1306 OLED, then [mircemk] might have the answer for you.

Contemporary displays eliminate the inertia problem by using arrays of lighted elements to form bar graphs, but any shortcomings in ... rectification and peak-hold functions also limit an analog ...

The analog volume control tracks the movement of the volume slider on your computer. The DragonFly has a 3.5mm output jack. It can be used with desktop speakers, like my Emotiva Airmotiv 4s ...