How to connect the Arduino Mega/Due with the expansion board : The Expansion bridge MEGA.

The expansion bridge is an Arduino Shield that connect the Arduino MEGA or DUE with the expansion board.

 Simulation

 Technical specifications

 - Independent +5V for the expansion board.
 - Independent +3V3 for the expansion board.
 - Real time clock DS1307.
 - Connection with LCD (Nokia 5110).
 - Connection with Encoder.
 - Connection with ESP8266.
 - Level converter to adapt the voltage in case of use Arduino Due (+3V3).

  Schema

Prototype