Does anyone have a functioning schematic for this particular project and also a Sketch code to go along with the schematic ?
Warm regards,
Dan.Micu@live.com
Sr. PCB Designer
Does anyone have a functioning schematic for this particular project and also a Sketch code to go along with the schematic ?
Warm regards,
Dan.Micu@live.com
Sr. PCB Designer
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
Is your question not already answered by the statement from the owner of this project?
"Everyone is free to work on this project.
Firmware is not distributed freely. Only completed project is offered.
For contact:
trayko67@gmail.com"
at:
https://oshwlab.com/trayko67/21-bands-spectrum-analyzer-buttoncontrol-ircontrol-v-1-0
This may be of some help:
https://blog.yavilevich.com/2016/08/arduino-sound-level-meter-and-spectrum-analyzer/