I want to make a coax cable tester/mapper using an Arduino micro or uno. What i need it to do is tell me which sensor is attached at each cable. There will be four sensors at least. I will put a sensor on each cable jack in different locations then go to a central location and test each cable line. As i test each cable, a led will go high when i have found each cable. I kind of know the programming but i am uncertain what the board should be looking for. Should it be measuring resistance or voltage out what? That's what i need help with. My first instinct is using different resistors in the transmitters but i haven't found any good examples on how to use Arduino to measure resistance. Can anyone help? Thanks in advance!
How about a simple PWM signal, with a different duty-cycle on each output to identify the cable?
ummmm, sounds great! how do I do that lol? sorry I'm just a noob