I am a high school student who always lose things. Thus it will be really helpful if I can create an item finder of my own. Such item finder isn't available in my country(or, too unpopular to the consumers), which is why I want to create one for my personal use. I do not demand a sophisticated design. Detection area within 1m radius is quite sufficient for my personal use. I am thinking of using it to detect small item such as stationaries. Any advise on how to start?