When the spell is pronounced correctly and understood by the Pi, it tells an Arduino to ‘shoot’ the spell out of the wand via an infrared LED. If the infrared receiver attached to the opponent recognises the spell, it sets off the TENS machine to deliver an electric current to the appropriate body part. Expelliarmus, for example, sets off the TENS connected to the arm, while calling out a successful Petrificus Totalus renders the opponent near immobilised as every pad is activated. For a moment’s rest, calling out “Protego” toward your own infrared receiver offers a few moments of protection against all spells aimed in your direction. Phew.
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — TechShop is closed, files bankruptcy
Wearables — Don’t shy away from intricacy
Electronics — Are you grounded?
Biohacking — Learning to See with Sound
No comments yet.
Sorry, the comment form is closed at this time.