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Gordon H

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  1. Hi Gordon, please see the PM I sent you, thanks


  2. You must have misheard slightly. The working Brecknell-Willis pans used on High Gill were scratchbuilt in brass (mostly by me). I demonstrated their construction at the first ModelRail exhibition in the early 90's at St Alban's (still got the sweatshirt!), and during the show I lent one to Hurst who were at that time considering the production of a kit. Some time later their kit appeared using brass castings. I did buy one to try out, but found it far easier to continue scratchbuilding instead.
  3. So what? I didn't claim my demo implementation would be directly suitable for the OP - just that you can see something akin to it at the AP show. Nothing to stop the same principle being used with a DC system. Indeed, the same hardware could be adapted to generate a PWM track signal instead of DCC, just needs different code.
  4. Gentle slow down, speed determined by the 'inverse' of the distance measured when within a specified range. The track control is implemented using a second Arduino acting as a DCC command station running 'DCC++'.
  5. If you would like to see an acoustic sensor Arduino shuttle in operation, I should have a demo on the MERG stand at Ally Pally. It uses two HC-SRO4 ultrasonic sensors with an Arduino Uno.
  6. LSC = Linked Section Control RLSC = Reverse Linked Section Control They are both a means of setting up a route, usually without using section switches just the point and signal controls. With LSC the train is driven from the sending end, and with RLSC the train is driven from the receiving end.
  7. Really? How about this whole section of their website: https://www.rapidonline.com/power-resistors How about Rapid 62-8112 or RS 157-550? Suggest you check the facts before making such sweeping statements.
  8. I suspect what you are dealing with here a 5V logic level output from the decoder processor, followed by a diode (and probably a resistor) in series with the output to prevent people accidentally connecting an external power source to it and causing damage. That would explain the off-load voltage that is being measured. I would suggest you ignore the posting immediately above, and try it with a conventional LED and resistor first. If you can, put a DMM in series with it, set to measure milliamps, and see what comes out. Anything in the 2 to 20mA range should be OK, then adjust
  9. The (non-operational) Automatic Crispin was displayed at ExpoEm in 2016. The manual version, in the form of Crispin himself, was also present for the occasion. I have some photographs somewhere...
  10. It will also be at Manchester in December. See picture here: https://www.eventbrite.co.uk/e/the-christmas-model-railway-show-manchester-2019-tickets-71273285315
  11. In similar vein, I think the pantograph base is on backwards. The longer legs should be towards the cab front.
  12. Two potential situations arise from this which would still cause the problem I was alluding to - switch bounce and too brief a pressing. There is no way to guarantee either of these won't occur, and with the level of current involved it only has to happen once or twice to ruin the switch. Far better to use a solid state solution rated for the job.
  13. More to the point, will your push button switches be able to cope with such a large instantaneous current of probably 15A or more?
  14. Can you confirm whether the new signals will work using a on/off switch rather than relying on a momentary switch action like the old ones did?
  15. Did they say whether the switch they now include with it will be an on/off type or a momentary type? Hopefully they have seen the error of their ways and gone for on/off this time round.
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