24 Channels Digital Volume Controller | PT2258 with ATmega328 | Arduino Code 

Up to 24 channel digital volume controller remote kit. Used IC is PT2258.
NB: PT2258 board has two types of grounds - digital (DGND) and analog (GND) ground. Don't connect the both grounds together inside the PT2258 board. The channel's ground and power supply ground must be connected outside the board. If you haven't connected both grounds (channel ground and power supply ground) together, the board won't work.
Arduino Code and PDB Design
drive.google.c...
PT2258 Arduino Library and Address Pins Details
daacwaves.blog...
/ daacwave
/ daacwave
/ daacwave