EMD SW1500 Ech O with Diesel sound

grabcad

Several people have helped make this model popular, I am thinking in particular of Daniel Norée to whom I extend my congratulations on this achievement.According to the 1/32 scale model, the model has been revised in 1/45 (Ech O) to receive a sound module based on a Nano Arduino.The tank is hollow and contains two small magnetic contacts on one side and the other giving the necessary impulses to trigger the noise of the diesel engine and on the other, the horn.Two magnets are glued to the standard track and by moving the locomotive, the desired sound is obtained. For the sake of 3D printing, the parts have been adapted to be printed on a small Wanhao I3. The material used is standard PLA.An Arduino Nano, a 9V battery box, a small LM386 audio amplifier circuit, a small speaker and two reed contacts are added to add sound to the whole.The parts were glued with a special glue for the PLA material, taking care to index them.