The heart of this project is the Geetech voice recognition module. In conjunction with an Arduino Nano and a relay, this little light-up Pylon can be voice controlled. The voice recognition module operating manual can be found here.
The operation of this design is very simple. You record a couple phrases, enable the voice recognition module, and when it detects a certain phrase, it will send out a hex value corresponding to it. In this design when "YOU MUST CONSTRUCT ADDITION PYLONS!" is detected, it will signal to the Arduino which will drive a transistor gate. This will power up the relay coil and complete the circuit to power the pylon. The phrase "My life for Aiur!" will disengage the relay.