Search found 237 matches

by abenn
Sun Dec 22, 2019 8:06 pm
Forum: Electronics
Topic: LED's for house lighting?
Replies: 11
Views: 1088

Re: LED's for house lighting?

Bare LEDs always need a resistor in series. As already suggested, 1k ohm is a good starting value, but in theory the minimum/optimum value depends of the LED's colour (different colours have different electrical characteristics), its current-carrying capability (usually related to brightness), and t...
by abenn
Tue Oct 15, 2019 8:48 pm
Forum: Electronics
Topic: SERVO OPERATED GATES
Replies: 10
Views: 1083

Re: SERVO OPERATED GATES

Hi abenn This is where I loose the plot I have'nt a clue when it comes to programmable chips I stick to basic electronic's using the 555 timer is a simple way to operate servo's the reason for 2 555's is one opens the gates 2 clockwise the other 2 anticlockwise the relay is triggered by my plug in ...
by abenn
Mon Oct 14, 2019 8:37 pm
Forum: Electronics
Topic: Faulty Led repair
Replies: 5
Views: 790

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?
by abenn
Sat Oct 12, 2019 8:36 pm
Forum: Electronics
Topic: SERVO OPERATED GATES
Replies: 10
Views: 1083

Re: SERVO OPERATED GATES

I'm not familiar with 555 timers, but am a great fan of PICAXE programmable chips, and use a single 14M2 to control the two servos driving the blades on a single slip, and 08M2s for single servos on regular points. The 14M2 has enough outputs that it could drive the four servos for your gates withou...
by abenn
Tue Sep 17, 2019 8:06 am
Forum: Real World Railways
Topic: Signal box redundant levers
Replies: 8
Views: 682

Re: Signal box redundant levers

Of course, silly me! Thanks Bufferstop.
by abenn
Mon Sep 16, 2019 1:43 pm
Forum: Real World Railways
Topic: Signal box redundant levers
Replies: 8
Views: 682

Re: Signal box redundant levers

Thanks for taking time for that explanation. So my box is going to get a full complement of levers, some with cut down handles, and quite a few painted white. BTW, just out of interest, what was the issue about not getting a two-handed grip on the levers operating modern equipment? Was that simply t...
by abenn
Sat Sep 14, 2019 8:55 pm
Forum: Real World Railways
Topic: Signal box redundant levers
Replies: 8
Views: 682

Re: Signal box redundant levers

That's an interesting insight stuartp. I had thought that all motorised points and colour light signals would be operated from a remote control centre, or is that only the case when there are no mechanical signals and points remaining? So my box could be controlling all the points and signals, of wh...
by abenn
Thu Sep 12, 2019 9:26 pm
Forum: Real World Railways
Topic: Signal box redundant levers
Replies: 8
Views: 682

Re: Signal box redundant levers

Thanks Jim. Yes, I'll make a brick relay room to go with it.
by abenn
Thu Sep 12, 2019 7:50 pm
Forum: Real World Railways
Topic: Signal box redundant levers
Replies: 8
Views: 682

Signal box redundant levers

I'm in the process of assembling a Ratio signal box to add a bit of interest to my N-gauge layout, and the kit provides a lot of internal detail. The box will be located at a junction between my main line and a branch line. The main line is deemed to be to modern standards, with colour light signall...
by abenn
Mon Aug 19, 2019 8:16 am
Forum: Electronics
Topic: Slow return.
Replies: 7
Views: 857

Re: Slow return.

Yes, if you use a LED with a resistor in series the brightness will vary in relation to the voltage applied. Not many ways to avoid this with DC. You can minimise the change in brightness by using a current-limiting device such as an NSI50010 LED driver instead of a resistor. That'll limit the curr...
by abenn
Wed Aug 14, 2019 10:30 am
Forum: DCC Forum
Topic: Fitting decoders in N gauge steam locos
Replies: 6
Views: 915

Re: Fitting decoders in N gauge steam locos

I've used Lenz silver mini decoders in all my N-gauge dcc-ready locos, including a Dapol Castle and Grange. All of them were as easy as Paul-H has said. My only issue was with my Dapol 0-6-0 tank where the decoder is slightly visible in the cab. I painted the visible bits matt black so they're not o...
by abenn
Wed Jun 12, 2019 8:22 pm
Forum: DCC Forum
Topic: Best way to wire up test track?
Replies: 7
Views: 824

Re: Best way to wire up test track?

Lenz is the only system I know, and it has a socket on the back of the control unit for programming purposes. So, a piece of track with two wires soldered to it, and a plug on the end to go into the programming socket, is the simplest way for me. It goes in a drawer when I'm not using it. With diffe...
by abenn
Sat Jun 08, 2019 8:17 pm
Forum: N Gauge Model Railway
Topic: Help
Replies: 1
Views: 1030

Re: Help

From Wikipedia: " United Kingdom The standard height for platforms is 915 mm with a margin of +0,-25 mm.[5][14] On the Heathrow Express the platform height is specified at 1,100 mm (43.3 in) .[15] High Speed 2 is expected to be built to dimensions conforming to the European Union technical stan...
by abenn
Fri Jun 07, 2019 8:47 pm
Forum: DCC Forum
Topic: Best way to wire up test track?
Replies: 7
Views: 824

Re: Best way to wire up test track?

How long do you want your test track to be? I use a loose piece of track about 18" long, with wires permanently soldered to it, with the appropriate plug for plugging into my Lenz controller's programming socket. Anything more than programming, and a short forward/backward test, I do on my layo...
by abenn
Thu May 02, 2019 9:35 pm
Forum: N Gauge Model Railway
Topic: Advice and help plz
Replies: 11
Views: 1525

Re: Advice and help plz

I moved from OO to N-gauge a few years back and, using Peco code 55 flexible track and electrofrog points and crossings I've never had a derail since I corrected the gauge of the front bogie on one of my Dapol locos. One key to reliable running is, of course, to have a good solid base for the track;...

Go to advanced search