Author Topic: Ethernet wall jack tester tool  (Read 2688 times)


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Ethernet wall jack tester tool
« on: February 15, 2013, 05:00:58 PM »

Wanted an ethernet tracer tool that lit up.  yes, already invented, but fun to make. Previously I tested continuity using an ohmmeter and a shorted ethernet cable. This tool is much faster.  Each color pair goes to a different LED, to show whether the pair has continuity inside the wall.

The interesting parts of this project:
-self-contained AA battery enclosure (Mouser 789-S3A-302112 enclosure, battery connectors 789-ACC-AANEG-5201, 789-ACC-AAPOS-5223, 789-ACC-AADBL-5212)
-LED sockets (Jameco 23077). They hold a standard 5mm LED. Installation: drill a 1/4" hole in the enclosure, insert socket, bend the inside legs outward a bit and insert LED from the inside.  The Ethernet cable also fit nicely through the socket.
-ethernet jack - I just pulled a spare one out of the wall
-heatshrink used as insulator on resistor legs
-heatshrink on battery connectors inside housing
-breadboarded first, then tested each step of the way so I wouldn't have to disassemble later if there was a problem
-didn't need an on/off switch since it only turns on with continuity.

observed bugs: if a solid is shorted to a different color stripe, it still shows continuity, but for the stripe's color. Might be possible to show this particular error with a diode, or more LED indicators, or something. Stripe-stripe and solid-solid won't show continuity.

Note: To improve mood, administer chocolate.


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Re: Ethernet wall jack tester tool
« Reply #1 on: February 15, 2013, 06:43:39 PM »
Nice, useful hack!! ^_^
"The American, by nature, is optimistic. He is experimental, an inventor and a builder who builds best when called upon to build greatly." ~ John F. Kennedy