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Homeowner Forum / Home Automation / January 2004



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X10 Problem (Sometimes)

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Blue6600 - 28 Jan 2004 15:19 GMT
Please Help...

I have a mini timer upstairs in my house, and I have a PC module linked to
my computer downstairs....

Throughout the house are various x10 modules including motion sensors.

When I press buttons on my bedside mini-timer, the device that corresponds
will switch off or on as it should, but my computer doesn't realise this has
happening.

The pc does pick up everything else that happens around the house.

IF I move the mini timer downstairs, the computer picks this up correctly.
Can someone explain please.

Thank You.
Spectrum - 28 Jan 2004 15:59 GMT
Sounds to me like a bridge issue. You have 2 legs in your power line.
To get the signal from one leg to the other, it has to go out to your
transformer and then back in. In your breaker box, the breakers
alternate legs thus (breaker # and leg)

1L    2R
3R    4L
5L    6R

So, breaker 1, 4 and 5 are on the same leg. Short path. To get from
breaker 1 to 2, you have to take the long route through the
transformer.

A couple of things to try:

If you have a 220V appliance, like an oven turn it on. If that solves
the problem (signal travelling through the heating element) you need a
bridge.

Try moving the minitimer to another outlet (served by another breaker)
in the same general area. If that outlet's on the same leg as your
computer it may solve the problem.

Signal bridges are a lot cheaper these days. You can even build one
yourself if you're confident. I think it's nothing more than a 50pf
capacitor (don't quote me).

The latest just plug into your dryer plug then the dryer plugs into
it. Mine is mounted in my breakper panel using 2 breakers.

Hope this helps,
John

>Please Help...
>
[quoted text clipped - 13 lines]
>
>Thank You.
Rich Greenberg - 28 Jan 2004 23:11 GMT
>Signal bridges are a lot cheaper these days. You can even build one
>yourself if you're confident. I think it's nothing more than a 50pf
>capacitor (don't quote me).

A .1 @ 600 or more volts will work better.  A series coil and capacitor
resonamt at 120 kHz best.

.1 mfd & 18 mH ISTR.

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