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Q&A CAN BUS monitoring with a LED

You'll need a differential comparator, something like what was suggested in here. But I'd look for a proper Canbus Rx and extract that to convert to single ended one shot to pulse for activity.

posted 1y ago by TonyStewart‭

Answer
#1: Initial revision by user avatar TonyStewart‭ · 2023-12-12T07:59:10Z (about 1 year ago) 
You'll need a differential comparator, something like what was suggested in [here.](https://forum.allaboutcircuits.com/threads/2-led-logic-probe-for-can-bus.119597/)
![Image_alt_text](https://electrical.codidact.com/uploads/ot0bum4akgg9chtybczrg4ik7u8j)
But I'd look for a proper Canbus Rx and extract that to convert to single ended one shot to pulse for activity.