Update! Added a change log, see at bottom of page
The Hectorrail 141 is a locomotive designed more for function than scale, but keeping a scale-like look. It is slightly smaller than scale to function better on the track. The electronics is very simple yet very powerful at the same time. A NodeMCU with a built in wifi access point and web server controls LED's and motor through a Dual TB6612FNG motor driver from Sparkfun.
This is a part of the OS-Railway system, intended to be a complete 3D-printable railway system. You can find the main track page here: https://www.thingiverse.com/thing:2146361
I hope I have included everything but reservation for errors, don't hesitate to ask in the comments if something is unclear! :)
The NodeMCU ESP12E is a very powerful little board equipped with a ESP8266 Wifi module. NodeMCU has their own script language but thanks to some hard working enthusiasts, it has been ported to Arduino as well. (see below on this page the simple steps you need to follow to use it with the Arduino development software.)
In the supplied code, the NodeMCU board acts as a wifi access point. This means that it creates its own wireless network that you can connect any wifi-equipped device with a browser to. When you open the browser and type in the web server IP-address (192.168.4.1) a web page with buttons and controls is sent to the browser from which you can control lights and the motor. The program is very small given the very powerful task it executes, thanks to libraries taking care of all the wifi-related stuff, so even if you have limited experience with Arduino, you should be able to understand the code and tinker with it.
Designed using Fusion 360. Big thanks to Autodesk for providing it for free for hobbyists!
Depronized
