I will try to do my best to explain myself,so.
I'm trying to turn off and on, five different farms that i have using opencomputers and integrated dynamics redstone reader and writer,the last one will send the final redstone signal to the farm and will turn it off.
The reader is simple,it will read the redstone signal on the block in front of it,and will store the actual redstone signal in a card,and the writer will only send the final redstone signal if the reading from the reader is exactly the number that i configured (between 0-15 )
the reader will be pointing to the redstone