Phil, from Belgium, bought this fellow from my Shapeways shop and painted him up real nice. He was good enough to share a couple of pictures. Really great job of weathering on his locos too, they look sharp, I wish I could do that.
Latest Project. I picked up this passenger/baggage car along with the caboose at the ECSLTS train show last month. This one was $30. Good deal. Finally got to work on it some. I’ve disassembled and painted all the parts, pulled out the bulbs and put in white LEDs. A few 3D peoples will populate the seats. I also got the nice shiny truck from ECLSTS. Scale is good. Looks like it has a load of zombies…
Some pics of the final buildout of my train depot. Cut from .060 styrene on my Probitix X90. Finished up with Rustoleum flat cammo colors from rattle cans. This should fare much better out in the elements than my wooden structures, plus styrene is way way easier to work with than wood.
I use Inkscape to draw the plans, then the free version of CamBam to make the G code cutting paths. The X90 uses a Dewalt dwp611 palm router driven by a super PID speed controller. All cuts are made with preciseBits 1/32 inch 2 flute endmills.
Latest incarnation of the Phone Throttle Contraption. The phone communicates with the Xbee Controller via bluetooth, a custom app runs on the phone. This is based on previous experiments with an android tablet, you can read about that here- Android, Bluetooth and Xbee
I’m trying to emulate a generic sort of DCC throttle ‘feel’ with this. I have all of the base code written and tested, it’s just a matter of pulling all the parts together. Slowly I’m getting everything working.
I picked up a cheap Aristocraft U25B in Chessie paint the other day and have been taking it apart so I can rebuild it. The idea is to get from the toy like unit I have into at least a semi-scaled sort of model. The photo above is the closest prototype image I’ve found to what is depicted with this Aristocraft rendition. So I’m stripping it down to the base parts with the idea to install my control system, batteries and sound. And of course, a bit of paint and detail work- it is a bit cheezy with the cast color parts. Yuck. So anyhow, I’m getting there. Below is an image of the original model. More in a later post.
Yes, I know this is a little weird but I want a knob AND a nice user interface (ala smartphone) to run my trains so I am working on this design. The Knob and underlying circuitry communicate directly with the 802.15.4 network. The phone is just there for the user interface and graphics. Bluetooth is used to communicate between knob/wireless controller and the phone. A custom app runs on the phone. I have the infrastructure working for this, its just a matter of smushing all the components into this small space and refactoring the software a bit. Both the case and the face plate for this were cut on my Probotix X90 3D router.
Today I got my order of printed circuit boards from Bay Area Circuits. I promptly populated them with components and powered them all up to see how they would do. Everything works! Very nice! Next step is to install these into one of my locomotives and replace all the breadboards with something clean and production quality.
Pictured, in order, is the 8Amp DPDT relay module, it’s used to reverse the direction of the locomotive. It can be triggered either with a logic one or zero, say from an Ardunio, or from an R/C signal via your generic radio control system. (The logic version is shown, the R/C version has an additional chip on the board, you can see the outline).
Second is the DCC output module. It is designed to be driven with a logic signal from a micro-controller such as the Ardunio. Logic input in, attach your choice of battery (or other) power to the input terminals and it provides up to 3Amps of DCC encoded power on the outputs.
Below that is the DCC input module, connect this to any DCC device like the MRC Prodigy or NCE DCC units and it converts the high voltage DCC signal down to what a micro-controller or Ardunio needs.
The last one is my Control Widget Node. This device is a micro controller wired to an industrial strength Xbee Series 1 802.15.4 Wireless Network Module. I use this for both my Control and Slave nodes. It allows high speed data delivered in an organized network infrastructure with a range of about 300 ft. I send both proprietary packets and DCC messages over this in real time. This is the latest PCB design.
Still have a ways to go on this but it’s coming out pretty good considering I don’t know what I’m doing 🙂 This is all cut out of .060 styrene sheet using my X90 3D router, Inkscape and Freebie CamBam.
I’m finding I much prefer to cut styrene as opposed to sheet plywood or blocks of pine. Styrene is an ideal material, it cuts easily, produces WAY less ‘chip dust’ and can be assembled with Testors sorts of plastic model glues and paints. This particular design is based on a photo from the VA Tech archive, a picture is in one of the posts below. I actually wasted only a little sheet on this one once I got the correct spindle rpm and feed rates figured out.
I’ve been doing quite a bit of PCB design these days, here is a version of my controller board, the ‘microwidget’. It’s quite compact. I have not had any made yet but I thought it came out really sort of, well, neat. Like art kinda.
All total I have about five or six small circuits for doing control networks- specifically for large scale model trains. DCC input and output, servo control, DC brushed motor control, reversing relays- all via Industrial strength Xbee Network wireless.
I’m also thinking of making an apt-get debian package to install JMRI on a RPi 2 and gitlab for my code. Hmm.
I think I need a Kickstarter 🙂
Here are the final two prototypes. The master obviously connects to the Prodigy Express and sports a long range antenna for max transmission power. What I’m thinking here is this is the module that will be connected to my RPi 2 which I am planning on running JMRI on. The Pi 2 will also have a long range wifi antenna on it so I can use it to source web pages to my phone and tablet. My standard handheld design is what I actually use to drive my trains with.
The second pic is the client. This one is fairly comprehensive and has quite a few parts but I use it as my standard prototype rig. In addition to the control board, it also has an (expensive) Pololu 18v7 motor controller and a current sensor. The DCC output stage is the board with the large chip beside the speaker. All it is used for in this incarnation is to drive the Econami Diesel DCC decoder which powers the speaker on the right.
Here are all the parts labeled, you can click on the picture for a larger version-