Spectrum Analyzer & VU Meter
2xLCD 16×2
2x Arduino Nano
2x Pot 10k (for Display)
1x Jack (5v Input)
2x RCA Input L+R
170x45x60 (WxHxD)
Related code:
VU Meter:
http://www.instructables.com/id/ARDUINO-VU-METER/
Spectrum Analyzer FFT
http://www.muhilham.com/2017/03/audio-spectrum-analyzer-arduino-lcd-2×16.html
Credits:
Linp74