This puzzle takes a new view on the segregation of tasks. This puzzle takes more than one person to open a brand new ultrasonic lock. Used in CTF style event.
- Arduino (board or any form will do.. I used an Arduino Uno board)
- 4 x Ultrasonic sensors
- basic LCD display
- lots of wires
- case.. transparant is nice
This is what the current version looks like.
The sticker with the country name indicates that the retrieved Flag can be registered in FBCTF powered scoreboard in Panama. If you are hosting something like a CTF event it is advised to take a look at the FBCTF on Github. (https://github.com/facebook/fbctf)