I am starting my 3rd year in September and I've decided to start thinking about research topics early. I'm quite interested in piezoelectricity along with it's discovered and perhaps undiscovered applications. This is my first idea; I have watched a lot of nature programs and I have seen that the tracker devices they use to monitor the whereabouts of various animals are always extremely bulky and in my opinion not very nice for the animal. I am interested in researching into a small compact tracker device for animals using piezoelectricity. I was wondering what you thought about this? Charging a capacitor using a piezoelectric crystal and the animals motion.. then once charged it releases a pulse. Instead of having to emit constantly thus wasting energy. Could the system be two-way.. i.e. charges through piezoelectrity then once the capacitor is charged the energy is then released through the piezoelectric crystal. The change in the crystals shape causes a high frequency wave to be produced and transmitted. Is this viable?