Creating a List of Electronics Projects developed on the OGR Forum

Here's one to get started with. It's kind of a mix match of 555 timer projects:  Semaphore and 555 Timer Circuit 

It goes back a few years, covers some different things done with 555 timers and CD4017 counters and ends up with a 4 way traffic light signal board. (It's also where this thread originated.) I'll re-read it all and try to give a better description of all that is covered. 

Just had another thought about this list. I was originally thinking about only posting links to these threads, but now I'm thinking it might be a good idea to post any related project files here along with the links to the threads. 

One important concern would be keeping the files current if there were changes or updates after something had been added to this list. Causing problems in trying to keep the files current with the latest versions. On the other hand, some of these projects have remained as they were designed for quite some time? Also, we probably wouldn't want to add anything that was still in the works, but wait until it was completed?

Any thoughts on this are most appreciated! 

Here's another project link. This is Ardian!'s AGHR Telemetry car for checking DCS signals around the track. AGHR DCS Telemetry Train Rev 7

This is probably not a beginner's project, and requires a bit of expense and a few parts so it's not exactly an inexpensive little PCB project. It also requires an Arduino and a Raspberry Pi (C code is included). It does really look like a very nice tool for diagnosing DCS problems as well as a pretty neat thing to have for a club or larger layouts. I think it would be fun to have on a smaller layout too (as in mine!). 

rtr12 posted:

Just had another thought about this list. I was originally thinking about only posting links to these threads, but now I'm thinking it might be a good idea to post any related project files here along with the links to the threads. 

 

Tom I am wodering if this is a good idea? I am thinking it would be difficult to keep updated files in two places, and this might go sideways on us. I think the original idea of a link to the thread where the circuit is developed and ultimately posted is the way to go. But that's only me. 

Rod

Another thing I am wondering is do we want to link to the opening page of the thread, or to the post where the build files are located? Then anyone who opens the link can always go back to earlier parts of the thread if they are interested in the development of the project. What do you think? 

Rod

Awesome proposal.  I can't wait to access it, however it turns out.

OK so here is a link to a handy truck or railcar mounted Track Spike Detector which you can haul around your layout and it will warn you if any damaging voltage spikes are detected by flashing two red led's. It is compact and easy to build, a great beginner project. Circuit originated by Stan2004.  Boards can be ordered easily online using the included Gerber files.

Link; https://ogrforum.ogaugerr.com/...track-spike-detector

Rod

Here is a link to a pretty neat board that will sequence 2 or 3 Aspect Block Signal LED's that are wired common anode. This wiring method is typical of offshore aspect signals such as those sold by wehonest and JTD. This is perhaps a medium challenging build using all through-hole assembly. A Bill of Material is included for both all domestic components, or all offshore including circuit boards. User notes are included to help the builder decide on several different assembly options and methods of use. Many folks contributed ideas and suggestions to this project, including Stan2004, gunrunnerjohn, cjack, RTR12, and Rob Paisley who operates a site called Circuitous. The boards can be ordered easily online using the included Gerber files.

Link to Thread: https://ogrforum.ogaugerr.com/...or-common-anode-leds

Direct link to Post containing the build files:files

Rod

I am having the same thoughts about posting the actual project files and keeping up with changes. But, after looking at a couple of project threads they were fairly old and had not changed since they were finalized. So I am now thinking that might not be as bad as I thought. There will also be links to the threads, so a note could be added to be sure to check the thread for updates. Maybe adding the date the files were added to the list would be a good idea as well?

What and or where to link to in the threads is something I hadn't yet thought of? This all sounded fairly easy at first, but might be a bit more involved than I first thought? When going back through the first thread I posted above, I discovered quite a bit of extra information that I had totally forgotten already. But is was very good info for someone trying to learn about these circuits. I relearned a thing or two myself by rereading that thread. 

I think I am now leaning toward a link to the main thread and maybe adding another link directly to the post containing the project files. Doing that and adding a note to always check the original thread for current versions might cover things pretty well.

How does that sound? 

Thanks for the additions too! 

I thought of one more, the TVS tester that Stan came up with and GRJ made some PCB files for: Protection against voltage spikes This is a nice little tool that is easy to build and handy to have around.

Here is the link for a 1 Amp LED/Incandescent Lamp Flasher Using Mosfets from about a month ago. This circuit flashes two lamps alternately at about 1 Hz, the speed can be varied by using slightly different value components. It is easy through-hole assembly and the cost to produce them is very reasonable. Boards can be ordered online easily using the Gerber files included. This board works equally well with leds or bulbs such as the PW #154 Lionel crossing signal, which has no internal circuitry of its own. BOM's and User Notes are included. 

Link: https://ogrforum.ogaugerr.com/...-board-using-mosfets

Direct link to build files: files

Rod

Here is the lower powered LED Crossing Signal Flasher Module suitable for any dual led crossing signal that does not have built in flashing circuitry. Again the suggested values give you about a 1 Hz flash rate, but this rate can be changed by using different value resistors as detailed in the thread. Very easy to build.

Link: https://ogrforum.ogaugerr.com/...-module-with-gerbers

Rod

for dcc folks, thor's diy o scale current keeper is great...

Another project courtesy of GRJ, Automatic cab light control, Rule-17 lighting, and smoke intensity control for diesels. 

Link: https://ogrforum.ogaugerr.com/...rol-lighting-in-loco

The module senses voltage on the loco motors, and when the loco is stopped, a relay turns on the cab light, dims the front and rear headlights, and reduces the smoke intensity.  GJR included Gerber files and BOM.   This uses surface mount components.  He includes a wiring diagram for TMCC diesels.   I believe it could be adapted to other control systems.  Boards at OSH Park were 3 for $4.40 in 2018.

He also included a smaller, cheaper simpler version without the smoke effects. The smaller boards were 3 for $2.15.

Bob

Another of grj's great little circuits is the DIY Constant Current Passenger Car Lighting Module linked below. These are an easy to build module with only 6 components, and easy through-hole assembly. Very nice beginner level project. (If I can build them, anyone can! ) Cost is less than $3 a board, and could be reduced with all offshore parts to about a buck.

Link: https://ogrforum.ogaugerr.com/...ighting-module-files

Rod

I like the converging format in the last few posts...a clear bold title of project, a 1-paragraph description, a link to the OGR thread(s) for reference/background.  Would be neat to also include 1 or 2 (at most) photos whether of the 3-D rendering or an actual built board, and a rough cost which I realize can be all over the map depending on where you buy the PCB, whether you use eBay/Asia parts, etc.  But I realize it takes a lot of editorial effort to manage such a list! Nothing is so easy as the job you imagine someone else doing.

Some other OGR projects that come to mind include: 1) DCS Perpetual Barking Watchdog, 2) TIU output level tester, 3) TIU TVS clamp board of which I believe there were 2 versions, 4) TMCC signal booster/tester, I'm a little fuzzy on this one, 5) and at least one LED conversion board for passenger cars.

Then, since we are still kicking around what this list should or shouldn't include, I wonder how to deal with the projects that repeatedly come up but never seem to cross the finish line as far as I know.  For example, a latching relay board for Tortoise switch machines, or an optical isolated trigger board so you can use the 99-cent eBay DC relay modules with AC O-gauge insulated-rail triggering.

Another issue.  So if someone stumbles across the list and wants to buy 1 or 2 boards whether assembled or as a kit, who do they contact?  It seems there have been a couple of threads where the OGR moderator justifiably swooped in and said such a request should be posted in the Want-to-buy forum where I'd think it is not likely to get a response (IMO).  Likewise, I can see how this list could end up looking like a For Sale forum which would/should surely get shut down.

Great Idea; gives me the idea of having a place for 3D laser prints and laser cuts where model files would be available. Sorry wrong thread.

Thanks to all who have added projects so far. It's really a big help in putting this together.

Stan, I agree on the bold titles, I like that format too. Rod has also been helping me offline, we are kicking around ideas on all the little details. But, discussing here is good too and also welcomed and appreciated. 

For the PBW, TIU Output Tester, I just wanted to make sure it was ok with GRJ to add these and gave us the ok last night. So I do have those on the list to add as well as the TIU TVS Clamp board. Thanks for defining that one, I was wondering what to call it. As for the Passenger Car LED board, would that be the one that Rod just posted? 

I don't know about the TMCC Signal Booster, I think GRJ may still be offering those so I'll ask him on that one too. 

For the often discussed, but never finished projects, I think those would be good ones to try and finalize. I might be in for something like that after I get caught up with this list. Rod may be willing to assist as well, I think he enjoys this stuff almost as much as I do? 

As for the kits of just a couple PCBs and parts, that would be nice, but would be quite a bit of work for one person to manage all these different projects I think. I was thinking of these as more along the lines of being all DIY type stuff that would maybe get others interested in the electronics part of the hobby. Although, I can't argue that having kits available would be a great idea for folks that want them. I do think it's something for consideration and cold possibly be worked on or worked out at some point in the future.

Also, I wasn't aware the moderators had stated these things should be in the for sale forum? I had considered posting the TIU Output Tester and the PBW info on the for sale forum (still sitting on several of each and orders have dropped off). But, I was considering this more of a service to forum members and it's all being done at cost. There's no profit so I wasn't really considering it to be selling (IMO anyway). In fact it's actually the other way around, I'm somewhat in the hole. But, it's kind of fun, I enjoy it, good learning experience, helps other forum members and keeps me off the streets. 

I agree about the for sale listing, it would quickly drop off the radar and be forgotten. I don't think anyone would gain from that. Maybe it can all be worked out, but sometimes I'm also a bit overly optimistic...