A DIY stereo VU meter powered by an Arduino Nano.
It features adjustable brightness and sensitivity and a switch to toggle the peak hold function on or off.
The script can be set to any number of leds and as separate left & right led strips or one led strip that is split into a left and a right part.
Check out the photo frame build over here: https://www.youtube.com/watch?v=WPpi5L1LgE8
Project details and the code are available over here: https://www.hackster.io/ericBcreator/stereo-neopixel-ring-vu-meter-b28e78
bensound – dubstep