Arduino Uno (Source : 4)
Arduino - Wikipedia
File:Arduino Mega 2.jpg - Wikipedia
File:Arduino Uno 002.jpg - Wikimedia Commons
wiki:v2:hooking_up_pixy_to_a_microcontroller_-28like_an_arduino-29 [Documentation]
Arduino - Wikipedia
Wiki: Arduino
File:Sensore DHT11 connesso ad Arduino.svg - Wikipedia
Grove - Turbidity Sensor Meter for Arduino V1.0
2 Channel 5V Relay Module - Wiki
wiki:v2:hooking_up_pixy_to_a_microcontroller_-28like_an_arduino-29 [Documentation]