Hi All
I have been asked to build a car audio display wall and i have a question.
I only need to switch the stereo audio signals not the power of the units. So i plan to use a 4 relay board for each head unit.
Can 1 pin from the Arduino activate the 4 relays on the board simultaneously so the L+- and R+- of the head unit switch on and off.
i plan to have ten relay boards and use a touch screen interface to be able to select the audio output from the selected head unit and route to the speakers.
Any advice would be appreciated.