Search found 681 matches

by Ironduke
Sun Oct 20, 2019 10:00 pm
Forum: DCC Forum
Topic: Help for a beginner - short circuit
Replies: 6
Views: 194

Re: Help for a beginner - short circuit

I can see why you'd want it there, so your train isn't always chasing its tail in the same direction. But you can only do it once; to reverse the train again you'd have to back it up through the crossover. Anyway I've redrawn my picture with a simple reversing module. https://i.ibb.co/SXVCzBr/revloo...
by Ironduke
Fri Oct 18, 2019 10:12 pm
Forum: DCC Forum
Topic: Help for a beginner - short circuit
Replies: 6
Views: 194

Re: Help for a beginner - short circuit

The reverser can go on the loop on the right. It has to be long enough to hold a whole train unless your rolling stock has plastic wheels
If you have accessory switches on your point motors, and can be bothered working it out, you don't need an auto-reverser.
reverser.png
by Ironduke
Tue Oct 15, 2019 4:07 am
Forum: Electronics
Topic: Faulty Led repair
Replies: 5
Views: 200

Re: Faulty Led repair

1K might be a bit low if the DCC p-p voltage is very high. Actually belay that. Even if DCC peak voltage was 18V and the forward voltage drop on the opto-coupler input was 1.7 (which is the max for a 6N137 apparently) you'd only get 16.3mA coming through the resistors ((18V-1.7)/1000). Maybe the in...
by Ironduke
Tue Oct 15, 2019 12:40 am
Forum: Electronics
Topic: Faulty Led repair
Replies: 5
Views: 200

Re: Faulty Led repair

I wonder if the LED is being driven directly from the DCC input and what the circuit is. Hm, yes it is. According to their circuit (see page 4) the indicator LED is reverse parallel across the LED input of an opto-coupler and has in series 2x2K resistors in parallel (so 1K basically). 1K might be a...
by Ironduke
Tue Oct 15, 2019 12:07 am
Forum: Electronics
Topic: Faulty Led repair
Replies: 5
Views: 200

Re: Faulty Led repair

I don't understand: He demonstrated that the faulty LED was getting 6.5v and, I think, mentioned that the voltage-regulator had failed open-circuit, which would have eventually caused the LED to fail. So why didn't he change the voltage regulator as well -- or did I miss it? What I got was that the...
by Ironduke
Sat Oct 12, 2019 10:40 pm
Forum: Personal Layouts - Under Construction
Topic: Picnic Creek - An US N gauge train set
Replies: 13
Views: 587

Re: Picnic Creek - An US N gauge train set

The stained glass particularly well done. Thanks :) but I can't really take credit for that, it came with the kit. Some parking https://lh3.googleusercontent.com/3qjb4_sMw-aVNbmLhHvt7ojSHTyriFuWzbk4_2ejXc1FFdMtFT0G9lTZdCsSz3PTFRAbEXaTlBMREll2ESrpH0jbEyS9WHSfO4Vj0XzXm6_YMZ5FtJ_m9qmG7ct8GZxbs4MuSZ2Du...
by Ironduke
Fri Oct 11, 2019 9:41 pm
Forum: General Model Railway Discussion / News
Topic: Gift ideas for railway modeller
Replies: 6
Views: 145

Re: Gift ideas for railway modeller

Most layouts can always use more figures. Make sure you check the scale.
by Ironduke
Fri Oct 11, 2019 9:33 pm
Forum: DCC Forum
Topic: Are there any members with a Powercab near Peterborough?
Replies: 9
Views: 234

Re: Are there any members with a Powercab near Peterborough?

D0260 wrote:'Ringing can be just using a x1 probe across the track ( or the power supply panel)

Make sure its a x10


Good point but I assumed both traces were taken with the same probe.
by Ironduke
Fri Oct 11, 2019 7:56 am
Forum: DCC Forum
Topic: Are there any members with a Powercab near Peterborough?
Replies: 9
Views: 234

Re: Are there any members with a Powercab near Peterborough?

That "ringing" you see on the second trace looks like a square wave with a low pass filter. Maybe some capacitance across the rails?
by Ironduke
Thu Oct 10, 2019 10:08 pm
Forum: Hornby - including Lima, Rivarossi, Jouef, Electrotren
Topic: Old tender drive A4
Replies: 16
Views: 387

Re: Old tender drive A4

You can't use the [img] tags for videos. Just paste the address or use [url] tags.

first video

second video

third video
by Ironduke
Thu Oct 10, 2019 9:49 pm
Forum: DCC Forum
Topic: digitrax 210
Replies: 8
Views: 246

Re: digitrax 210

That's very bad luck.
As far as I'm aware Digitrax are very much still in business. http://www.digitrax.com/
Here is their list of UK dealers.
http://www.digitrax.com/dealers/by-area ... 20Kingdom/
by Ironduke
Wed Oct 09, 2019 2:15 am
Forum: General Model Railway Discussion / News
Topic: End of train lamp
Replies: 7
Views: 218

Re: End of train lamp

that works. Very nice.
by Ironduke
Tue Oct 08, 2019 10:52 pm
Forum: General Model Railway Discussion / News
Topic: End of train lamp
Replies: 7
Views: 218

Re: End of train lamp

hi triuph,
I can't see the video. It says it's private.
by Ironduke
Sat Oct 05, 2019 9:48 pm
Forum: Personal Layouts - Under Construction
Topic: Picnic Creek - An US N gauge train set
Replies: 13
Views: 587

Re: Picnic Creek - An US N gauge train set

Kansas enjoyed the glow of being a very pacific corn and wheat region, with little crime...until the Holcomb massacre. That rather withered everyone's sentiments. Hm.. just read up on it. Sad. There must be few places that don't have similarly withered sentiments by now. But on with the show.. Here...
by Ironduke
Fri Oct 04, 2019 10:45 pm
Forum: General Model Railway Discussion / News
Topic: Parkside Kits - Add Weight?
Replies: 11
Views: 218

Re: Parkside Kits - Add Weight?

Previously I've used the self-adhesive weights they use for automotive wheel balancing.
Image

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