May 28, 2010
I am trying to build a robot lawnmower(yes another guy trying this).. I need to understand Inductive guidance or RF technology a bit better to build a buried wire circuit for this.. I have read alot on the web and am starting to understand inductor/capacitor circuits.. I built a transmitter using a 555 and a 2n2222 to raise the current in the wire.. I then built a L/C circuit with a 339 comparator and I can tune it to pick up the signal from the wire(I can see this on my oscilliscope)..
My question is that I seem to have alot of noise as well and even if I touch the inductor I see alot of noise from that as well.. Is there an electronic way to filter this out? Did I make my circuit wrong? Is there a better way to accomplish what I am trying??(maybe using am radio signal in the wire instead of RF)?? Please any information on this topic would be greatly appreciated as I have invested ALOT of time and money trying to solve this issue..