Twisted wire supressing output?

I am hoping that the experts on this board can answer this question.

I have a Robotic lawnmower that uses a radio signal radiated by wire
loop to both keep the unit within a boundary as well as provide a guide
for the robot to follow while trimming the perimeter. This is similar
to a dog fence as far as the signal generation goes.
Any required splices are by means of silicone filled wire nuts.

My questions:
Will a twisted wire splice cause any degradation of the signal?
If yes, could anyone recommend a better way of splicing the wire than
wire nuts aside from solder?

Any thoughts on lightning protection?

Thanks

RR

 

Is it just me, or does an unmanned, self-propelled piece of (sharp)
rotating machinery sound like a really bad idea?


Bob

 

[martin griffith]

On 12 Aug 2005 12:22:14 -0700, in sci.electronics.design
rrold1@aol.com wrote:

I am hoping that the experts on this board can answer this question.

I have a Robotic lawnmower that uses a radio signal radiated by wire
loop to both keep the unit within a boundary as well as provide a guide
for the robot to follow while trimming the perimeter. This is similar
to a dog fence as far as the signal generation goes.
Any required splices are by means of silicone filled wire nuts.

My questions:
Will a twisted wire splice cause any degradation of the signal?

probably not if it has a couple volts across it

If yes, could anyone recommend a better way of splicing the wire than
wire nuts aside from solder?

screw terminal blocks,welding, if its clean and dry, almost anything

Any thoughts on lightning protection?
don't stand under a tree in a storm

Thanks

RR

martin

 

[me]

Is it just me, or does an unmanned, self-propelled piece of (sharp)
rotating machinery sound like a really bad idea?


Bob

just you, sounds great to me...


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[Ross Herbert]

On 12 Aug 2005 12:22:14 -0700, rrold1@aol.com wrote:

I am hoping that the experts on this board can answer this question.

I have a Robotic lawnmower that uses a radio signal radiated by wire
loop to both keep the unit within a boundary as well as provide a guide
for the robot to follow while trimming the perimeter. This is similar
to a dog fence as far as the signal generation goes.
Any required splices are by means of silicone filled wire nuts.

My questions:
Will a twisted wire splice cause any degradation of the signal?
If yes, could anyone recommend a better way of splicing the wire than
wire nuts aside from solder?

Any thoughts on lightning protection?

Thanks

RR

Use 3M Scotchlok gel filled splice connectors
http://www.3m.com/market/telecom/access/pow/connector_chart.jhtml

As for lightning protection for your wiring loop, I don't think their
is much chance of getting a lightning strike if it is only a couple of
feet above ground. If it did get a strike it would be destroyed no
matter what protection you fitted.

 

[John Popelish]

rrold1@aol.com wrote:

I am hoping that the experts on this board can answer this question.

I have a Robotic lawnmower that uses a radio signal radiated by wire
loop to both keep the unit within a boundary as well as provide a guide
for the robot to follow while trimming the perimeter. This is similar
to a dog fence as far as the signal generation goes.
Any required splices are by means of silicone filled wire nuts.

My questions:
Will a twisted wire splice cause any degradation of the signal?
If yes, could anyone recommend a better way of splicing the wire than
wire nuts aside from solder?

Any kind of splice will allow the system to work. The only thing you
have to consider is if the splice is moisture proof.

Any thoughts on lightning protection?

My son has a dog fence around his property and had the fet drivers
zapped a couple times by nearby lightning strikes before he added some
transient suppressor diodes like Digikey part # 1.5KE12CADICT
http://www.diodes.com/datasheets/ds21503.pdf
one from each end of the loop to the local receptacle ground. This
also protects the power supply from being arched across its insulation.

After a year with lots of lightning, it has survived, unscathed.

 

John,

I would like to keep lightning spikes outside the walls. Do you think
that I could run a line to the ground spike outside instead of a
receptacle?

To "Me" who thought ithe mower was a great idea:
probotics.com

RR

 

[Rich Grise]

On Tue, 16 Aug 2005 06:15:38 -0700, rrold1 wrote:

John,

I would like to keep lightning spikes outside the walls. Do you think
that I could run a line to the ground spike outside instead of a
receptacle?

To "Me" who thought ithe mower was a great idea:
probotics.com

Just enclose the house in a Faraday cage. ;-)

Cheers!
Rich