Hi to everyone,
I've build a simple cable tester using Arduino. Everything works fine except one thing. I have a ground pin on my connector that is actually grounded to the metal enclosure. Unfortunately, it doesn't allow me to energize my diods, because current goes to the ground. Is it a way to work around it?
Regards,
Yurii
Only if you can break the ground connection at the Arduino end .
I was hoping for a magic that I'm not aware of in electrical connections.
Why is it so hard to leave the ground connection open?
Connector is made this way. I can't work around it.
Is the connector on the testing device, or on the cable to be tested?
DO I understand that you are testing the cable while it is connected to the enclosure? We always tested cables by themselves and that worked for thousands of cables.
Yep , you need to have a plastic box for your cable testing , then no common ground .
Yes. You are right, we are testing cabels while it's connected to enclosure. It saves time compare to pinging using voltmeter.
It's what I will do for next cable. I'm not a big fan of plastic enclosures, but it's ok.
If it doesn't work, how are you saving time?
Only ground does not work properly. I believe that I found a way how to fix this connector. I will replace screw that hold the insert to non-conductive screw. It will separate the ground on connector from enclosure. For next box, I will look towards plastic enclosure.
Why does the box have to be grounded?
It should not in my case. Usually, any metal enclosure must be grounded per standard. But it's grounded based on default design of components.
