Capture the flag can be fun, but Karel Bousson has put a new spin on the game that allows you to compete against neighbors over who can keep a single item — a modified tool case — in their possession the longest.
The box contains an Arduino Mega that interfaces with an RFID reader to enable the current owner to scan in, plus a GPS module for location data. Additionally, an LDR sensor can be incorporated to set the brightness of an LED matrix on the outside.
Data passed along to a Raspberry Pi for time of possession tracking via LoRa with The Things Network. This also runs a server that shows game info to others playing, meaning that you’ll have to be very careful to keep it around!
Code for the project is available on GitHub.