Sorry that I am new to this switching and can't understand well.
What relay should I use and how I should connect them?
I had upload a sample switching that i wish to have.
When 1st test, I wish to connect to R1, R4, R7.
When 2nd test, I wish to connect to R2, R5, R8.
When 3rd test, I wish to connect to R3, R6, R9.
How do I implement this kind switching with micro-controller?
All need to be controlled by micro-controller.
Is that possible i use only 3 switch that can on the example>
(R1, R4, R7),
(R2, R5, R8),
(R3, R6, R9)
each at the same time?