(Sorry for bad English) So my friend and I are preparing for a competition where we have to create either an programming or mechanical project of our own. And we decided to make a chess board that can detect what piece was moved and to show legal and illegal moves, start and stop the clock and memories past moves. So we need smal weight sensor that is smaller than 2x2 cm and can weight 1-50 grams while being relatively cheap cuz we need 64 of them. Any recommendations