any one please post me rat repeller ckt
You don't want to repel rats, you want to kill them. I had a problem on my back porch a few years ago. Stupid neighbor put out food for birds, squirrels, stray cats, and wouldn't listen to me, when I tried to explain that he was also feeding bugs, rats, mice, raccoons, opossums, snakes, and everything else. He wasn't helping as much as he thought, since the wild critters would be attacking and feeding off his friends, and bringing pests and diseases. I bought two electric rat traps (about $40 each), and use to throw the dead rats over the fence for him to find. Even after he final moved out, still caught rats for about three months, before it finally ended. Repellents aren't 100%, some learn to ignore it, or aren't effected.
Don't use poison around your home. Okay, I suppose on a farm or something, but when the rodent dies, it's usually hidden. It's weak and sick, doesn't want to be an easy meal, so hides someplace safe and hard to reach, the smells up the place, for a week or so, or until you find it. Figured, I'd throw that piece of wisdom in, and spare you the unpleasant lesson.