I am trying to make a water level sensor.
I want to use a single circuit for two water tanks. For this I need to be able to switch between two sets of 7-wire-inputs to the circuit (the 7 wires that are in the water tank in the diagram below.
What is an simple/elegant/cheap/easy way to do this without having to use 7 switches?
Thanks for all the answers! Some clarfications:
- I will using a 9V battery source, not mains.
- I thought of one more solution: the circuit inputs will be connected to a CAT5 socket, and the input wires (CAT5 cables) from the two tanks will have connectors. So I can simply switch cables and use the one circuit.