Dagworth

An LED and a resistor in series act as a voltage divider circuit, the potential difference across the LED itself when lit will be its voltage requirement, it has a proper name but I can’t think of it right now, I’m in the middle of a gig! The voltage across the resistor will be the supply voltage minus the LED voltage. Different coloured LEDs have different forward voltage requirements. If they are in parallel, with only one resistor supplying both LEDs then only the one with the lowest voltage requirement will light, and it will bring the voltage across the others to its - and not theirs - voltage requirement. The other LEDs will not get enough voltage to bring them into conduction. The only way to stop this is by having LEDs of different colours with a resistor for each colour. That way each LED/ resistor set acts as its own voltage divider across the full supply and gives each LED the voltage it needs to light.

There are ways to use a normal single pole change-over switch to control a PECO solenoid motor, each point ends up with its own CDU but the switches will indicate which way the points are set. Andi

I'm really impressed with what you have achieved here, this is going to be something else when it is finished! Love that viaduct... Andi

I thought you lived at Toddington 09.09.17 Toddington 45149 by Phil Richards, on Flickr Andi

As long as you have a resistor in series with the red led and a separate resistor in series with the white then both will light. Try it for yourself. Andi

You don't need higher value resistors for the reds, they are less bright than the whites by design so need a LOWER value resistor. White LEDs tend to be very bright and need a higher value resistor to dim them down. Andi

Personally I think the best DCC sound I have ever heard was on Loftus Road, that Desiro unit, the sound was so subtle that as it pulled away from the platform I thought to myself that I ought to be able to hear the traction motors singing, then realised that I could hear them but the volume was exactly right, not overpowering like so many but just there! Andi

No reason why you can't have both reds at one end in parallel (or series) but with a single resistor shared between them. If the LEDs are the same they should both light. (check photos from your time period too, many locos could not have both red lights lit at one end, they were either one or the other, being able to light both together came in much later) What I would do is to cut the vero track running to the white LED at each end and bridge that cut with a 10k resistor, and cut the track running to the red LEDs at each end and bridge that cut with a 1.5k. (Or cut the white track to each end six times and bridge each cut with a 1.5k so all the white resistors are in series, that would add up to 9k) The other thing that I would seriously do if you can is to wire the red LEDs to the green and the purple function wires rather than white and yellow, then you can switch them off when the loco is hauling a train. You will never see a loco with tail lights on while it has a train behind it in real life. You can then control the tail lights from f1 and f2 of your DCC system. Andi

The reason for putting a higher value resistor on the white is just that they are MUCH brighter than the red, so the higher value tames it down Andi

Yes, the white LED needs a higher voltage. The simple answer is one resistor PER LED. (You'll also find you need a higher value resistor for the white - around 10k in my experience - than the 1.5k I know you have, for the red) Andi

Ooo! That sounds a bit familiar.... Dagworth was based on operations at Ipswich when that was a changeover point from AC electrics to diesels on the Norwich - London services. We ran it using Lenz DCC and the most effective way it work was with one driver looking after the 47 and another with a different handset working the 86. https://youtu.be/er4iNSQhVIg?t=149 Andi

Can't tell you the title, but I had it too, hardback with a deep red/maroon cover IRC I remember a picture of a large steam engine on rollers at Rugby, titled Going Nowhere Fast Andi

https://quasarelectronics.co.uk/Category/kits-modules-countdown-delay-timers-with-display Andi

Coventry https://www.google.co.uk/maps/@52.3976163,-1.4962036,3a,36y,349.57h,94.21t/data=!3m7!1e1!3m5!1sKE7GrKYYHpoWyXttZGj1pA!2e0!6s%2F%2Fgeo1.ggpht.com%2Fcbk%3Fpanoid%3DKE7GrKYYHpoWyXttZGj1pA%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D172.54419%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656 Andi

Is it fitted with a motor? If so then fix the motor to one of these that has the spring instead of the one in the point. If it isn't then fit one of these and a motor. https://www.peco-uk.com/product.asp?strParents=3309&CAT_ID=3337&P_ID=17647 That way you don't need to disturb the point at all. Otherwise fit a Tortoise type point motor that doesn't need a spring Andi

They weren't my 31s They belonged to one of my operators, I only own two sound fitted things, an 86 I was very kindly given, and an APT-E (which has never been on any track yet!) Andi

And getting back to modelling... Andi

I find that with ALL sound fitted stuff Andi

Are you a Witch? Andi

That's a model? Pull the other one.... Andi

This one still exists in Gloucester https://www.google.co.uk/maps/@51.8540312,-2.2287444,3a,75y,123.53h,99.69t/data=!3m7!1e1!3m5!1sZad3cg4gB5n8i8mu-eW7aw!2e0!6s%2F%2Fgeo0.ggpht.com%2Fcbk%3Fpanoid%3DZad3cg4gB5n8i8mu-eW7aw%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D84.91671%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656?hl=en Andi

First post Jan 2015 http://www.rmweb.co.uk/community/index.php?/topic/94290-bow-locks-was-a-bit-on-the-side/?p=1724643 and ten days later posts show all track laid and the control panel for the points and signals built. A post on the 10th Jan 2015 shows point motors in place http://www.rmweb.co.uk/community/index.php?/topic/94290-bow-locks-was-a-bit-on-the-side/?p=1736817 That's only 38 months ago from today, I exhibited the layout 17 months ago. Can't see how you can get that track layout took two months from any of my posts, or that it took 46 months to finish. Please explain... The layout was exhibited at Cheltenham show in October 2016 http://www.cheltmodrail.org.uk/exhibition.php?ExKey2=37, 22 months after construction started. Andi

Barnwood, Gloucester https://www.google.co.uk/maps/@51.864712,-2.2149043,3a,75y,107.39h,114.17t/data=!3m6!1e1!3m4!1saNXoJceqU11xJSoI0_JlYQ!2e0!7i13312!8i6656 Ipswich https://www.google.co.uk/maps/@52.0715587,1.1330164,3a,75y,170.34h,90t/data=!3m7!1e1!3m5!1sba0wlzr1RrMRHL7M2IHUPw!2e0!6s%2F%2Fgeo2.ggpht.com%2Fcbk%3Fpanoid%3Dba0wlzr1RrMRHL7M2IHUPw%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D174.02812%26pitch%3D0%26thumbfov%3D100!7i13312!8i6656 Andi

Not sure how you got that, I started the layout Christmas 2014, worked on it for a couple of weeks and had all track laid (about two days!) and wired, all point motors fitted, and fully working. Then I pretty much put it away for a year while I worked on Ravensclyffe again. I then got it out again the following Christmas and did some more work, and exhibited it in October 2016, 22 months after first cutting timber for it. Andi

Damn, now I've got Guns 'N' Roses in my head https://www.youtube.com/watch?v=JYoIgKxOK4A