The hardware itself is pretty straightforward. There is an Arduino Nano to run the speech recognition algorithm and a MAX9814 microphone amplifier to capture the voice commands.

It uses an Arduino Nano ATmega328P connected to a breadboard to control the LEDs representing the traffic light's lights. Its logic is simple, it turns on a traffic light every 1 second until all 5 ...

Watch this video on YouTube. “The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.x).

The SATURN NITRO is PIC32MK development board that closely follows the Arduino Nano form factor, but with much beefier specs and I/Os.