Re: [PLUG] ethernet wiring in walls

[Paul <gyoza@comcast.net>]

George Gallen wrote:

> Here is the el-cheapo method....
>
> Need:
>
> 1. 9v battery
> 2. 9v battery connector to wires
> 3. a short cable end with exposed wires
> 4. a cable connector box to screws (or another
>    short cable if both ends have jacks)
> 5. 1 LED
>
> FIRST: DISCONNECT ALL EQUIPMENT FROM NETWORK
Since logic levels go up to 5V, so you can't overload anything by 
accident, it's better to use a pair of AAA or AA batteries to create a 
<5V power source.  Also, make sure you use LEDs with built-in resistors, 
or resistors added, or your LEDs will burn out.

I actually make a few of these testers.  At one end I have a power 
source.  At the other end I have a jack with two LEDs in it.  Works 
great.  It can detect a loose wire better than an expensive piece of 
equipment that is used mostly for more sophisticated tests.

I could make and sell a couple if anyone wants them.
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