Introduction: The Martian Hexadecimal Pathfinder Project

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A project that reproduces the communication scene between Mars and Earth from the well-known movie, The Martian


Supplies

1.Arduino Nano

2.ST7735 Display

3.Stepper module

4.Stepper motor

5.Infrared module

6.3x push buttons

7.Visuino and Arduino IDE software

Step 1: Schematic Diagram

We make the connections strictly following the connection diagram in the attachment.There is no need for pull up resistors for the buttons, they are made of software.



Step 2: The Code

The project code is compiled in Visuino, but the attachment is also in IDE format. We open the application and load the code into the Arduino controller.

Attachments

Step 3: Construction of the 'Pathfinder'

We make the electrical connections, after which we proceed to the mechanical construction. I chose for the 'hexadecimal circle' pawns with a flag on which I noted the hexadecimal writing from 0 to 9 and from A to F. It will be considered to mount the center of the motor. in the center of the formed circle. We type a letter on the display, write down the data and insert the flag where the arrow stops. Pay attention to the zero point, to the infrared sensor.


Step 4: Testing the Device

We start the device from the batteries on the Vin pin of the Arduino (6-12 volts) or via the miniUSB plug. The 3 operations that the device automatically decodes will appear on the screen. Also, the arrow will move every time it is fed to point 0. From the 2 buttons, we choose one of the 26 letters of the alphabet. Press the third button and the device will send decimal coordinates to the motor. The engine will follow routes after hexadecimal writing. At the end of the cycle, the device will clearly display the transmitted letter from hexadecimal.

I hope you liked my project, if you have questions you can put them in the comments section! Enjoy!