Two signal generators

[roninwar]

 I will give this a try later this season when the weather is not too hot.

The only concern is the switch...

[roninwar]

I can not seem to come up with a way to make this switch work... What can I use?

toolbelt, can you provide me with a link to Oscar's original post/thread from the other forum?

I think this layout would do wonders for my back yard (as there are areas in the center that the grass is very long, despite the robot spending most of everyday there (extra battaries)).

[toolbelt]

I don't understand your question.  If you are talking about parts etc for the switch,  I suggest you go to Radio Shack and ask them to sell you a switch that fills the drawing requirements that I posted.  It may not be a 9 volt one but you would still need a transformer to provide the DC voltage for it.  When the timer switches from OFF to ON the transformer would provide DC power so the switch would activate switching from Line A to Line B.  When it switches to OFF the switch would go back to normally closed to Line A.

Here is an old link to one of the postings from which you can do some searching for his original posting.  This link covers most of what was discussed.  If you go directly to the old site the forum link does not exist (I didn't see it if it was there) Oscar came up with the boot/toe thing prior to this posting.  http://www.bamabots.com/board/index.cgi?act=ST;f=1;t=218;st=0

The layout should also work even if you have a 3500 and run it backwards around the perimeter wire to a zone.

[RobotLady]

Hi All,

I recently found out the maximum wire length with a signal booster is 1,000m or 3,280ft.  A general recommendation is to use a signal booster when the wire length is greater than 600m/ 1968ft, but I have seen the need at 1500 ft as well (perhaps in that case the customer also had a loose connection).

If the wire length exceeds the maximum length, the strength of the signal will go down, but since the configuration reduces the distance the signal has to travel it **might** make up for it.  At some point, though, the signal will become too small for the Lawnbott receiver to lock onto it and it does not matter how much cancelling you have.  It is strictly dependent on wire length.  All you could do is experiment and see if it works.

Also, using one robot transmitter in the front and the other robot's in the back is an excellent idea.  Just make sure the one not in use is turned off, or bear in mind that if you leave it on you might see some issues.

If you try the wiring configuration to see if the "no signal" performance improves, I would be very interested to know how it turns out.

Robotlady

[shep874]

Hey Toolbelt a big thanks for the boot layout.  I have been having the no signal problem for some time now and the same poor mowing in the center of the yard.  My back yard is 500' by 100'. I have recently installed a 10" by 180' tongue through the center of the yard. I still get some loss signal events, but not enough to impede the mowing.  I have been thinking of doing something like this and not being one that reinvents the wheel will install your layout. Thanks Mel

[toolbelt]

Your welcome, but a ton of the credit goes to Oscar the Lawnbott who came up with it.