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RobertW

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  1. Hi Alan, You can check the resistance of the coil by setting the meter to its lowest resistance setting, which will be indicated by an omega symbol. If you place the first probe on a connection to one side of the switch, and the other on the common connection if you are using a Hornby version, or the solder tag at the same end of the motor but on the opposite side if you are using a peco version. If you can post a photo of the motor, I can confirm the terminals which need probing. Please let me know if you have any further questions. Kind regards Rob
  2. My background is in electronics, so I like to include things like signals on my layouts. I've attached the drawing, which I realised wasn't on my reply. I included some on my last layout, but wanted to improve the realism of the placement and types of signals that I used. Thanks, Rob SCENIC_TRACK_PLAN.pdf
  3. Hi All, Apologies for the delayed response, I've have managed to draw up the track plan I'm working on. There will be a cassette fiddle yard on the right of the drawing, but I still need to design this in. I'm intending for the lower road to be the long curved siding, designed for 3 SLUs. The middle 2 roads will be considered 1 road for the Inglenook system, making 2 SLUs, the top road will also be intended for 2 SLUs. I'm currently thinking a position light on the heels of each point, making 4 and one on the long road, there will then be a position light and theatre indicator on the entries to each point. There will be a 3 aspect signal on the exits to the fiddle yard. It will be in a industrial, urban area in the late 1960s to the early 1970s, a small exchange sidings in the Trafford area of Manchester, between the MSC and BR lines. I'm currently developing the logic circuit for this, and I'm wondering if there what the best model of a ground position light, both with and without theatre indicators. Please let me know if you need any more information. Thanks in advance, Rob
  4. Hi All, I'm starting to plan my next layout,which will be a 3-2-2 inglenook, based in the late transition era in the LMR. I'm planning on using colour light signalling, which will be functional, with electronic drivers, once I've figured out what the logic will be. How would I signal it. I'm thinking a 3 aspect signal as a home on the exit, but I'm not sure how to signal the shunting signals. I'm not sure if I'll track circuit it, or the signals will be manually operated. I'm happy with the electrical side of things, just unsure of the location and number of aspects for the signals. I'll post a drawing tomorrow if I get the time to draw it, otherwise it'll probably be towards the weekend. Thanks in advance, Rob
  5. Hi Neil, The answer is, it depends. Assuming that the lamps are LEDs, then if you wire all the positives together and all the negatives together (in parallel), then a resistor is required in the positive supply to each lamp. If you wire them positive to negative, then you need to be careful as to how many LEDs you connect between the positive and negative. Do you have a link to the product, as there are a couple of numbers in the specification that could make the difference. If you want a simple answer, then this site may give you a good answer, assuming all of the LEDs are the same colour and type. http://led.linear1.org/led.wiz Hope this helps, Rob - Edited to simplify the explanation
  6. Hi I'm currently building a 2-storey warehouse structure. It's based around a low relief version of the Dapol booking hall. I'm using the double door entrances to the kit as a hoist. I'm not sure of the design of the hoist support at the top. I'm thinking of some kind of structure constructed of I-beams. Does anybody have any examples of hoist supports, or any guidance on designing my own? Thanks in advance, Rob
  7. I think that we are using Mitsubisi MELSEC units. They began to teach the basics of Ladder Programming last week using the worlds most inefficent PLC programmer. StL is The three letter word for Statement Listing (like FBD (Function Block Diagram)). Rob
  8. I am studying a HND in Electrical/Electronic Engineering, and one of the units that I am studying is PLCs. I was considering Ladder Logic as a method of planning the relay sequencing, and then producing a relay board as a form of automatic control. I don't have any experience of Structured Text Language, and a limited idea about Function Block Diagram programming. I haven't got a particular problem in mind, but was simply wanting to discuss the ideas of PLCs and Ladder logic with an idea to automatic control. Rob
  9. Hi I am an Electrical Engineering student and was wondering what applications for Programmable Logic Controllers and Ladder Logic in model railways for the purpose of planning wiring schemes in Automatic Control. Ladder logic is designed for PLCs and Relays. Cheers Rob
  10. Depending on the size of the layout you could try 16/0.2mm equipment wire (3A) 32/0.2mm equipment wire (6A) 50/0.25mm High Current wire (30A) it all depends on the current capacity of the layout, how long the cable runs are and what the permissable voltage drop is. the larger the current rating the lower the voltage drop along the cable and the better the layout will run. Rob
  11. Yes if you want to change between Either having both panel mounted or both Handheld. If you want to independently control Which tracks are under panel and which are under handheld control then you need two DPDT switches. Would it be worth using Centre-Off types to Isolate the layout from the controllers? Hope this Helps Rob
  12. Sorry James Should have picked up on that sooner. It stemmed from me misreading some advice on the internet which said to fuse both the primary and secondary and I mistook it for Live and Neutral. Have updated the diagram and am reposting it. If I can I will remove all the other circuit diagrams. I haven't built this circuit and am glad of your help in this. Thankyou Robert Inertia Controller Twin Button.pdf
  13. Sorry My fault, remove said circuit diagrams and update with corrected versions
  14. I don't have one yet! I am just trying to get the general gist of it (to get ahead of the game) ready for going back to college in September to do a HND in Electrical/Electronic Engineering.
  15. Do you have a copy of the program for the circuit for me to study. I have downloaded all the relevant datasheets so hope to learn the programming language. Rob
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