This suits the commonly available Arduino shields which combine a 16×2 character LCD with a set of four tactile buttons in a cross formation.

Assembling, coding, and using a fingerprint scanner is a great miniature project, even if you don't use it to protect your most secret and sensitive items.

The electronic circuit can be assembled by sticking the module snappy with a magnet "Little Bits (Little Bitz)", The microcomputer board"ArduinoModule has appeared. We did not need any breadboards ...