Freeze-drying fruit at home?
Assuming you have a frost-free freezer (which dehumidifies the cold air), I'd experiment by laying sliced fruit on a sheet (maybe on a layer of waxed paper) and putting it in the freezer. Pull out a slice every day or two to check its crispness. The time necessary will depend on the type of fruit, its moisture content, the slice thickness, and the room's humidity.