Rodent deterrent

Though it may sound hard to believe, one day you may be unable to start your car in the morning not because of a flat battery or engine trouble, but because the ignition cables have been chewn away. Certain rodents, in particular, stone martens, appear to be very fond of all kinds of plastic and rubber objects wh ich they happily destroy without actually eating these materials. The circuit discussed here keeps these beautiful, nimble animals at a safe distance from your car.