function loadChip(){
  chip=new Component('main',true,'{"type":"main","inputs":3,"tooltips":[],"pins":[0,0,0,0,0],"subComponents":[],"positions":[],"wires":[]}');
  chip.groups = [[0],[1],[2],[3],[4]];
  chip.tooltips = ["A","B","carry in", "sum", "carry out"];
}