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Thread: Weekend Update (21st Jan 2022)

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    Post Weekend Update (21st Jan 2022)

    Please update us on the progress you have made on your MRR projects this week (commencing: 21st Jan 2022).

    This weekly thread is to post little snippets about your layout/project progress.
    This is not be a substitute for your layout build thread, but just a mini update on what you got done for the week.

    You can link from your layout build thread to your posts in this thread as a part of a more extensive post there, or visa-versa (post to your build thread and link to that post when contributing to this thread.

    Click on a post's #number (right-hand end of the post header) to get the URL to that particular post in your browsers address bar.
    Copy and paste this as needed.

    So, fellow nSn'ers, what have you been up to this week?

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    I've made test benches for experimenting with IR detectors between the rails. They're based on an IS471F detector which I tried with a quick mockup some time ago. It works great, but now I need to figure out the details for the physical design. The IR LED and the detector will be close together, so how close can they be and how close am I to the edge of the operating range? I need to determine those kinds of things to make a stable plug-in detector. Also, placing it between the rails means it should somehow be hidden or camouflaged and I have some ideas that I need to try out. It's going to be fun.

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    You probably know this, but I'll mention it for general consumption. With cross track IR detection, it is best to place the emitter and receptor diagonally across the track. This avoids the on-off-on that occurs when gaps between cars pass through the beam.

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    Quote Originally Posted by el Gato Gordo View Post
    ... With cross track IR detection, it is best to place the emitter and receptor diagonally across the track. This avoids the on-off-on that occurs when gaps between cars pass through the beam.
    Good point.
    My detectors will be reflective, looking up at the bottom of whatever passes on the track, so I guess they'll exhibit the same behavior to a certain extent. There are two ways to counter it: either delay the signal electronically (one-shot design) or build the software to cope with the flicker. I was counting on the software as I'm going to make it myself, but now that you've pointed it out, I should probably add a short delay to the detector circuit.
    Thanks
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    Hi

    I have my IR Detectors placed within my track. I leave 1 tie between the transmitter and the receiver. I also install them on about a 30 degree angle so when the beam hits the bottom of the car it will reflect down into the receiver (kind of shaped like an ‘X’ where the centre of the X is the bottom of the car). Once the track is ballasted all you see is the end of the receiver and transmitter at the same level as the ties.
    Regards,
    Warren

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    Quote Originally Posted by African Pirate View Post
    Hi

    I have my IR Detectors placed within my track. I leave 1 tie between the transmitter and the receiver. I also install them on about a 30 degree angle so when the beam hits the bottom of the car it will reflect down into the receiver (kind of shaped like an ‘X’ where the centre of the X is the bottom of the car). Once the track is ballasted all you see is the end of the receiver and transmitter at the same level as the ties.
    That's exactly where I'm aiming
    Thanks.
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    Another step toward beginning benchwork. More lights strategically placed. 21 46" LED lights. The family thinks its overkill. HAHAHA.
    John

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    Quote Originally Posted by jhn_plsn View Post
    Another step toward beginning benchwork. More lights strategically placed. 21 46" LED lights. The family thinks its overkill. HAHAHA.
    https://lh3.googleusercontent.com/w1...-no?authuser=0
    As long as you are running trains, you might as well be bronzing

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    Quote Originally Posted by jhn_plsn View Post
    The family thinks its overkill. HAHAHA.
    Lights are like Workbench space, one can never have too much!
    Looks good.
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    More prep work - I've assembled some AC to 12V DC converter kits. A few missing caps are in the mail.

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    Not really anything with the layout or trains but I did finally purchase a Canon 18-135 zoom lens and I tried it out. Just some quick and dirty shots but I can definitely get pics I couldn't before.
    KEEP THE SHINY SIDE UP!

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    Not as much time as I hoped this week, but I did get this bit done:

    FEB6024C-CF03-448A-B753-D9FE29D5DD8E.jpg

    I put down the three straight turnouts and the section between them, and the curved turnout. Also the curve going into the main was put in.

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    Default N Scale Housatonic RR

    I had little to no time for modeling this weekend, but I did manage to paint a resin transformer casting and add it to the amazing Woodland Scenic's Built-Up N scale Substation. This substation will be serving the Kimberly Clark Plant in New Milford, on my layout. I still need to weather it a bit more and add cables for the 2nd transformer. This configuration comes very close to the prototype arrangement at the actual plant.
    Attached Images Attached Images

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    As an electrician since 1970, I must say you have really nailed the look - weathering, etc. - of a substation, @POMPERAUGRR! A bit more dirt on the concrete pad of the substation is warranted, though.

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    Power Stroke, I'd love to see more pics of the cityscape of your layout, really nice work!

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    Quote Originally Posted by el Gato Gordo View Post
    As an electrician since 1970, I must say you have really nailed the look - weathering, etc. - of a substation, @POMPERAUGRR! A bit more dirt on the concrete pad of the substation is warranted, though.
    Thank you. That substation is a built-up product from Woodland Scenics, so they get all the credit on weathering and assembly. It is expensive, but well worth the cost when you see the detail and weathering. I just painted and added the second transformer resin casting inside the girder structure. I need to add appropriate cables to tie it in to the circuit breaker assembly . I then need to mount the base of the substation assembly to some styrene to eliminate the slight warp in the base. I plan to dirty up the concrete pad and have the entire unit surrounded by chain link fence and gravel between the pad and the fencing. I still need to install utility poles to bring in street power and connections from the station to the building.

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