Made with BBC Make It Digital and Wolfblood. Burglar alarms are a great way to deter sneaky so-and-sos and alert you to anyone trying to get their grubby mitts on your stuff. The micro:bit is a great way to keep watch and sound the alarm even while you're not around. Your mission, should you choose to accept it, is to turn your micro:bit into a combination lock to alarm a box (or door or drawer, or whatever your imagination drums up).