Arduino Train with track and wagons

thingiverse

This is a project made on Christmas holidays. It is a train powered by two 3V motors, and a Chinese 18650 battery powerbank. An Arduino Uno board, controls the motors and lights, in addition to receiving IR commands. It can be controlled with any infrared remote, I am using the one from my tv. The program includes functions such as, soft stop, regulate the speed through the remote control, program the number of turns the train has to do, and play the song Jingle Bells. In the attached files you can find the circuit diagrams, and the arduino program. The board that controls the motor includes 5 LEDs that must always be on while the main switch is in the ON position. This is because the powerbank needs to detect a minimum consumption, and if it does not, it automatically shuts down. In this way, with the consumption of these LEDs and the arduino board, we have a fixed consumption about 75mA, enough for the powerbank to remain in continuous operation. Another detail is that I first thought using an L298N board to control the motors, but I realized that it is not possible to use it because it needs a minimum of 6V to operate, and the powerbank only provides 5V. Therefore I had to design a small circuit to control the motors through a BD230 transistor. You can find all of this in the documentation. If you see flat head masonry nail and you don't know what to do with them, these are for making the non motorized axis. Just cut the head and set it to a length of 38.5mm. Each section of train track, has an angle of 30º, to make a complete turn, you will need to print 12 sections.