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Junctionmad

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  1. It’s such a corner case it’s around the corner in real life electronics with similar leds , one resistor will “ work” Yes it has certain specific drawbacks but in practice it actually works. Yes it’s not a Recommended approach but for leds from the same family operating well into their safe current zone it will work and no I’m not recommending it
  2. I have done this also , here Les the fusion 360 cad , I just finished the software
  3. If you look at the characteristic curves of leds the VF rises with current , Hence your sceanario will not occur
  4. My experience is I don’t rely on the peco wires and i solder on my own I would always recommend bonding the switch blades to the stock rail and switching the frog as the optimum approach, but as has been said the points will work out of the box also.
  5. If you points and signals are electrically operates then , other then having a particular interest , there no advantage in building mechanical interlocking in our case we have a bicolour led at each lever , red locked , green unlocked , red flashing , lever out of position simple and easier to understand
  6. Modern PC low voltage psus are actually quite complex , as any perusal of their schematics will testify
  7. I don’t know what you’d think of our big O gauge DCC layout with 2x10 A and 2x8A switchers feeding it !!
  8. Other then the consumption of wire there is no other drawback to a low voltage ring main , however twice the number of connectors etc give opportunities for poor installation and hence unexpected resistances if you size your wire right , you don’t get any issues with voltage drop anyways and wire is expensive , ring mains are essentially simply doubling the conductor area ( the ring main has largely been replaced by radials )
  9. At the cost of those levers , using them for dummy operations is a rather expensive peccadillo. as a builder of a 72 lever frame , my view is dont bother with dummy levers unless you have a penchant for absolute fidelity and mechanical interlocking , there are tablets you can take that help this condition include levers to make your layout work as required , a model railway will never be a facsimile of a real railway. if the frame is large , evaluate the operator workload. ( especially if you add bells and what not. )
  10. At £20 a decoder for a basic but high quality brand from Zimo and controller solutions from £150 up , why not buy 1 loco next year and convert the remainder
  11. Obviously not on a mac with iCloud then , you poor thing , not only are my bookmarks backed up , they automatically transfer across all my devices ( 7)
  12. When I designed the big O gauge now at 20 baseboards , it was always intended to be an exhibition layout. I was determined to ensure that past mistakes weren’t repeated and that the goal of a complex but reliable layout could be conceived. This extended to running reliability etc. Yes this needs a bigger budget and a careful and controlled process with one person in charge of that process , even if many people contribute to the work The result is a layout that can be erected and basically operational within 1 hour. And to date the record for dismantling and truck on the road ( we use a full size commercial truck ) is 40 mins. At a recent 3 day show. Beside track cleaning it ran faultlessly for the period result no stress , huge fun. it can be done, electricity isn’t voodoo
  13. We have a very electrically complex layout , using MERG Cbus , etc , one disconnected wire in 6 exhibitions , its not the complexity that causes unreliability , it’s the poor standard of typical electrical installs that causes the issues
  14. Don’t use mains twin and earth , it’s like wrestling with a snake buy a few metres of decent stranded cable
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