I am working on a project to take in 3 voltages through 3 wires. There are ONLY 3 connection points.
1) I need to confirm the 3 wires are wired to the 3 connection points. Sometimes, 2 wires could be connected to 1 connection point. or 3 wires to 1 connection point.
How can I use logic gates to design this?

 

Not enuf detail on what you are planning.
What are the voltage levels?
what type of gates do you intend to use?
Give a detail explanation of the circuit you want to built.

 

Is this a continuity tester or voltage tester? Do you want to be sure that there is a connection, or KNOW the voltages?

 

the 3 voltages I am using is 5V, 3V, 0V
all of them must be connected to 3 i/o. if 1 of them is not connected, there should be an indication.
I thinking of using AND gates to take in the signal but i am not sure how to verify the presence of the wire. Can it detect when no wire(either 5V, 3V, 0V) is connected to it?

 

3 voltages I am using is 5V, 3V, 0V

Why the 0V.
Ground should always be connected to sense the other two.
Which means you need only two Vsense.

 

Rf,

Yes,u r rite... I can use 1V to simulate the input of 0V, as i need it as reference.

Why the 0V.
Ground should always be connected to sense the other two.
Which means you need only two Vsense.