Electronics > Beginners
LAN cable tester based on 4017
johnkenyon:
--- Quote from: edavid on February 13, 2020, 08:05:45 pm ---
--- Quote from: johnkenyon on February 13, 2020, 01:31:10 pm ---
--- Quote from: edavid on February 13, 2020, 01:41:49 am ---BTW, I think you would be better off using a CD4022 instead of a CD4017, so it doesn't have dead time with no LEDs on.
--- End quote ---
Surely you can feed the 4017 reset from the "8" output - that way the thing counts from 0 to 7, then resets back to 0 when it gets to 8.
Then you if desired, you can easily expand to a 9 or 10 wire tester by moving/removing the reset connection, and adding LEDs.
--- End quote ---
I think it's unlikely that Ethernet cables will start having 9 or 10 wires :-//
--- End quote ---
4x twisted pairs plus 1xshield = 9 wires to test.
In any case, I like the idea of having "something for nothing" that's there if you need it at a later date.
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