Making reverse loops can help in model train layouts to change the direction of trains, which cannot be done with turntables. In this way, you can create single-track layouts with a reverse loop on each end to run trains without any pause or interruption. So, without further ado, let's get started!
For this project, here is the list of required parts and components:
If you don't have Arduino IDE on your computer, download it from here. The library for the Adafruit motor driver shield can be found here, in case you don't have it in your IDE. Make sure you install this in your IDE before compiling the program. If you need help installing a library, check this link out.
Before attaching the motor driver shield, make sure all of the pins are aligned and then push the shield down to attach it firmly to the Arduino board. When keeping the board in an upright position(see the above image) such that the analog input pins are on your side, make the following connections:
Power up the Arduino board and the motor driver by connecting either the VIN and GND pin respectively to 12-volt power and ground respectively or by connecting the barrel connector of the adapter to the power socket of the Arduino board. Double-check all of the wiring connections and turn on the power.
If everything goes on well, then your setup should work like the one shown in the above video.
Now that you have got the example setup running, you can further add another reverse loop on the other end of the outer track to make the train go running in both the directions on a single track without any interruption(you will need to modify the Arduino program for that). Show off your skills by modifying the Arduino program to increase the functionality of this project or just simply let me know what you did with this. Let me know if you made this project to help me know if this was useful to you at all.
I wish you happy railroading. All the best!