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 can use an LM-3915 to get a logarithmic response characteristic of a VU meter. Of course that is a change to active electronics, and you may need a power supply. There are lot of LM-3915 ...