Farduino

By using special coding it's possible to use a cheap IR LED and IR receiver as used in remote controls to make a simple infrared link between Arduinos using the built in serial port.
The problem with RS232 is that it contains a DC component. By restricting the character set such that the DC component is eliminated, it's possible to send and receive data using a commodity remote control IR receiver. A Python program is used to identify the required codes and schematics are provided showing the LED modulator and IR receiver hookup.

Features

Uses cheap commodity IR receiver and IR LED.
Use of built in serial port requires minimal CPU support for communication.
Hardware is extremely simple.

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