Hello everyone.
I'm working on a automated cable tester project that aims to test cable continuity and resistance using an Arduino Mega, a graphic LCD screen or a TFT screen (TSA0159), and a DIN64 connector. The user connects cables to be tested to a counterpart linked to our system via the DIN64 connector. The screen provides an interactive menu system implemented with a matrix keyboard for user navigation. When the user selects continuity testing, the system sends a signal through the cables via the DIN64 connector and displays the results on the screen. Similarly, for resistance testing, the system measures voltage drop across the cable using analog pins and calculates resistance using Ohm's Law. Any guidance or code suggestions would be greatly appreciated !
Thanks in advance
Checking for continuity is straightforward I think. Measuring conductor resistance is more tricky, depending on length of the cable. The resistance of a short cable is likely much less than 0.1 ohm, to get that accuracy you will need a specific circuit to measure it.
I'm not sure what you gain from a resistance measurement, what fault are you hoping to identify that a continuity check would not discover?
this is my finals project for a cable factory, they insisted that they needed a continuity test and a resistance measurement test.
this is actually my first time doing a project like this since i'm using a DIN64 connector to connect various counterparts which were the cables will connect to. this is a bit overwhelming for me since it'ss my first time so i apologize if i sound dumb..
also checking for continuity is straightforward like you said and i can find a solution for the resistance test but putting everything together (the menu and navigation and the matrix keyboard commands and checking the connected pins of the DIN64) is what's really bothering me
There is probably quite a lot of examples of driving TFT screens and handling keyboards around. However, it seems quite a challenging project for a beginner, even if in terms of how much code needs to be written. I would look for an existing menu library, at least to get some ideas from.
Additional challenges in any project are getting a good understanding of the requirements.
Resistance test is necessary if the wires are soldered to the connector pins. Do you have a range of resistance values that are ok and anything outside those values is a failure. You will need to measure fractions of Ohms, I think.
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.