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.
Define the components you have in mind to do this. Which Arduino, touch screen, and relay board.
You're likely looking at a separate power supply too to drive the relays.
baskyabhai:
Can 1 pin from the Arduino activate the 4 relays on the board simultaneously...
If mean the common opto isolated relay boards, the YES.
The optos on those boards need a sink current of 2mA per relay input.
8mA total is well within the specs of a 5volt Arduino (maybe not a 3.3volt Arduino).
Leo..