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by RAF96
Tue Jan 24, 2012 9:01 am
Forum: Electronics
Topic: Mixing point motors makes
Replies: 18
Views: 1525

Re: Mixing point motors makes

I stand corrected on the voltage/current switch above. Slip of the keyboard pen. I bow to your excellent knowledge of the theory of electo-magnetics and as this thread appears to have drifted well off course from the OP I reckon the subject has been adequately covered. I may however try the test cir...
by RAF96
Mon Jan 23, 2012 6:13 pm
Forum: Electronics
Topic: Mixing point motors makes
Replies: 18
Views: 1525

Re: Mixing point motors makes

@baldrickbr
I've just got to try wiring a CDU into a token circuit with a point motor using really, really heavy cable to see if it works.
I really believe the volumetric damping would 'kill' the CDU pulse and the motor wouldn't actuate.
I know about the 'book'.
Rob
by RAF96
Mon Jan 23, 2012 5:15 pm
Forum: Electronics
Topic: Mixing point motors makes
Replies: 18
Views: 1525

Re: Mixing point motors makes

@baldrickbr How best can I better explain what I mean. Imagine a big wire as a big (in volume) water pipe. The capacitor 'squirt' from the CDU 'hose' would fill a small volume pipe and react out the far end with enough push to operate a (hydraulic) point motor, but the same 'squirt' would make littl...
by RAF96
Mon Jan 23, 2012 3:55 pm
Forum: Electronics
Topic: Mixing point motors makes
Replies: 18
Views: 1525

Re: Mixing point motors makes

Hi guys As a (not so) complete electrical numpty can someone please explain this: 1. Assume thin wire is restrictive of voltage thus it has high resistance and requires high current to get from from one end of a wire to the other - and is therefore not advised for points motor operation. 2. Assume t...
by RAF96
Fri Jan 20, 2012 5:32 pm
Forum: Scratch and Kit building
Topic: I Love Metcalfe Stuff - But !!
Replies: 21
Views: 3842

Re: I Love Metcalfe Stuff - But !!

I use UHU for Metcalfing as it can be found for £1 a big tube when I'm in UK, rather than almost €4 the same size in Cyprus where I live. I prefer balsa cement for card models as it doesn't string like UHU, but it does shrink and can distort joints in card if you are a tad over generous with the tub...
by RAF96
Fri Jan 20, 2012 5:10 pm
Forum: Electronics
Topic: Wiring points.
Replies: 11
Views: 1341

Re: Wiring points.

If you fit Peco surface mounted solenoid motors to Hornby points you will have a bit of slack as the Hornby tie bar pin is smaller than the Peco hole. What is an exact adaptive fit is the brass tube supplied with Hornby underfloor solenoinds to fit the extender pin. Just cut off a bit about 5mm long...
by RAF96
Thu Jan 12, 2012 11:23 am
Forum: DCC Forum
Topic: Accessory Decoders
Replies: 9
Views: 1848

Re: Accessory Decoders

Here how I run analogue and DCC points switching together... http://www.rmweb.co.uk/community/index.php?/gallery/image/26693-wiring-point-motors-for-dc-andor-dcc-operation/ I use rotary and pushbutton switches but the principle is the same for pen and stud or toggle switches, just parralel in to hav...
by RAF96
Sat Dec 03, 2011 4:17 pm
Forum: Electronics
Topic: SCART Plugs
Replies: 11
Views: 1382

Re: SCART Plugs

If you aren't too confident with soldering up scart plug/socket pin go for a ready made cable (of the correct type/no of pins) and cut it in half, then you can connect the cut wire ends to say a choc block then on to your track boards.
Rob
by RAF96
Tue Nov 22, 2011 11:37 am
Forum: Electronics
Topic: Led lighting
Replies: 3
Views: 566

Re: Led lighting

Hi
I use the regulated outputs from an old H&M2000 analogue controller to supply my lighting circuits.
One knob controls the platform/street lights and the other is for points indicators.
I can adjust the 'speed' to dim/brighten the lights as required.
All my leds can then use a 1K resistor.
Rob
by RAF96
Sun Oct 23, 2011 4:57 pm
Forum: New discoveries???
Topic: Cheap light signals
Replies: 24
Views: 7558

Re: Cheap light signals

These are mine...
http://www.rmweb.co.uk/community/index. ... nal-lamps/
Full details of how I made them can be provided.
Rob
by RAF96
Sat Jul 02, 2011 7:53 pm
Forum: DCC Forum
Topic: Decoder for Mallard
Replies: 8
Views: 706

Re: Decoder for Mallard

Strange no one has recommended the Hornby Sapphire decoder which has all sorts of nice features like ADCC, refuel-sim, programmable auto-ops, shunting mode, special lighting effects, etc. I've got them in most of my Hornby locos. The only drawback is they are a big 21 pin decoder and need the suppli...
by RAF96
Wed May 11, 2011 7:22 pm
Forum: DCC Forum
Topic: how to wire up DCC points and motors
Replies: 8
Views: 1473

Re: how to wire up DCC points and motors

Hi You can wire up your points for DC and DCC operation as per this ... http://www.rmweb.co.uk/community/index.php?/gallery/image/26693-wiring-point-motors-for-dc-andor-dcc-operation/ I have used push buttons and rotary switches for the DC side but probe and stud, passing contact switches or any oth...
by RAF96
Sun Mar 20, 2011 3:13 pm
Forum: DCC Forum
Topic: DCC Help needed re points power
Replies: 13
Views: 926

Re: DCC Help needed re points power

Hi I agree that the most likely cause of unreliability is poor alignment causing undue friction in the mechanism. My point motors are wired with Cat5 network cable via a CDU and some are a fair distance away (up to 5m) and they crack over every time, so voltage drop is not quite the devil its made o...
by RAF96
Sun Mar 20, 2011 2:59 pm
Forum: Electronics
Topic: Wiring street lights
Replies: 8
Views: 5407

Re: Wiring street lights

I also use an old H&M2000 to power my street lights and point indicator LEDs. I run them from the 2 controlled DC outputs so I have the facility to turn them down as the LEDs especially are a bit bright for night time running. The spare uncontrolled AC output powers my points motors through a CD...
by RAF96
Sun Mar 20, 2011 2:54 pm
Forum: Electronics
Topic: Opinions about point control please!
Replies: 6
Views: 1164

Re: Opinions about point control please!

Hi I operate my points by both DCC and analogue methods - the reason being I like the ease and reliability of operating them manually, but I need DCC operation when using Rocrail to change my points during route setting. Please see this thread on another forum for info. http://www.rmweb.co.uk/commun...

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