As someone who has no idea of what I'm getting myself into, I am relying on the expertise of the members of this forum to stop me before I waste a lot of time on something that is impossible to accomplish. Here is what I am trying to accomplish:
Two parallel wires, no more than eighteen inches long, connected to an ohmmeter. Circuit is completed by a conductive something (let's call it the Train) that rides on the two wires like a train on tracks. Is there any way the ohmmeter could detect the change in resistance if the Train moves as little as 2mm? And just to make this harder, the system must get its power from common batteries (AA, AAA, or 9-Volt, etc).
What I'm primarily looking for is a way to detect movement of the Train, and I thought resistance might be the easiest way.
Any thoughts would be greatly appreciated, even if it's just to let me know this is impossible.
Two parallel wires, no more than eighteen inches long, connected to an ohmmeter. Circuit is completed by a conductive something (let's call it the Train) that rides on the two wires like a train on tracks. Is there any way the ohmmeter could detect the change in resistance if the Train moves as little as 2mm? And just to make this harder, the system must get its power from common batteries (AA, AAA, or 9-Volt, etc).
What I'm primarily looking for is a way to detect movement of the Train, and I thought resistance might be the easiest way.
Any thoughts would be greatly appreciated, even if it's just to let me know this is impossible.