Search found 212 matches

by Gordon H
Tue Oct 25, 2016 6:59 pm
Forum: Electronics
Topic: Choc blocks
Replies: 17
Views: 2029

Re: Choc blocks

I would always recommend tinning any and all bared wire ends with solder. Tinning the whole bared end of a wire destined for a terminal block is generally considered bad practice as it removes the compliance of the strands which are meant to deform individually as they are clamped, just as they wou...
by Gordon H
Tue Oct 18, 2016 7:56 pm
Forum: New discoveries???
Topic: Megapoints Controller (Point Servos)
Replies: 24
Views: 11561

Re: Megapoints Controller (Point Servos)

Gordon I take your point, but as an Electrical Designer, if I get that wrong, I deserve the smoke! :o I was thinking more of situations where fumbling with flying lead connections underneath a baseboard might result in an inadvertent mis-connection. Given that it is common to sacrifice a servo exte...
by Gordon H
Thu Oct 13, 2016 12:30 pm
Forum: New discoveries???
Topic: Megapoints Controller (Point Servos)
Replies: 24
Views: 11561

Re: Megapoints Controller (Point Servos)

You seem to have used additional servo cable ends for your microswitch connection flying leads, which is of course a reasonable thing to do on the face of it. However, I would have suggested you use the opposite gender arrangement for the microswitches compared to the servos, to prevent the possibil...
by Gordon H
Sun Sep 25, 2016 6:07 pm
Forum: Electronics
Topic: Playing sound files without proprietery software
Replies: 2
Views: 363

Re: Playing sound files without proprietery software

There are lots of projects out there that do this kind of thing already. Try searching 'microchip mp3 player' or similar.
by Gordon H
Sat Sep 24, 2016 7:52 pm
Forum: Electronics
Topic: Making a single gate move. HELP!
Replies: 64
Views: 7059

Re: Making a single gate move. HELP!

800hz = -90deg 1500Hz = 0deg 2200hz = +90deg Do you really mean Hz? Shouldn't that be microseconds? Or are you simply changing the pulse 'high' time by varying the 555 astable frequency as a whole? That would be an unusual approach, given that most R/C servo driver circuits use the standard 50Hz up...
by Gordon H
Sat Sep 24, 2016 7:31 pm
Forum: Electronics
Topic: Help with switches
Replies: 5
Views: 991

Re: Help with switches

I would suggest a 3-position rotary switch would be best, as it should allow you to change the signal from green back to red directly without passing through yellow. :D Except most rotary switches have a detent angle of 30 deg per position, so you would have to turn it through 300 deg each time to ...
by Gordon H
Tue Sep 13, 2016 8:38 am
Forum: DCC Forum
Topic: PC based layout control
Replies: 9
Views: 1191

Re: PC based layout control

That is an impossible question to answer without knowing what level of control you want to achieve and what kind of interaction you might have with it in operation. A list of requirements would go a long way towards this.
by Gordon H
Sat Aug 13, 2016 8:31 am
Forum: General Model Railway Discussion / News
Topic: Miniature saw table
Replies: 13
Views: 3154

Re: Miniature saw table

You might like to consider something like this. I use its smaller brother for fibreglass PCB work.
http://www.proxxon.com/en/micromot/27070.php
by Gordon H
Thu Aug 04, 2016 7:35 pm
Forum: Electronics
Topic: Platform Lighting Question
Replies: 17
Views: 2025

Re: Platform Lighting Question

I still need advice on the 3mm LED's on 12V what rating gives a good brightness.? That depends on several factors. The 'brightness' rating of the LED (usually expressed in milli-Candelas) The viewing angle of the LED (suggest you want a wide angle type for this kind of thing, otherwise you have 'sp...
by Gordon H
Sun Jul 24, 2016 9:27 am
Forum: Electronics
Topic: Gaugemaster Shuttle SS-1
Replies: 5
Views: 1204

Re: Gaugemaster Shuttle SS-1

Lenz Gold and Silver loco decoders can be configured to operate a loco as a shuttle using their built-in Asymmetric DCC functions.
by Gordon H
Tue Jul 05, 2016 12:44 pm
Forum: Electronics
Topic: Choc blocks
Replies: 17
Views: 2029

Re: Choc blocks

If you have the option, choose a type with a wire protector so that the screw does not bear directly on the wire.
by Gordon H
Wed Jun 08, 2016 7:58 pm
Forum: General Model Railway Discussion / News
Topic: Concrete sleepers
Replies: 11
Views: 2015

Re: Concrete sleepers

It would seem though that the C&L and Kato track is also flexi track which I would rather avoid....... Fixed curves is an almost must for me I feel....... Kato Unitrack in concrete for HO is not flexi track. It is actually a rather better equivalent to standard Setrack insofar as far as its des...
by Gordon H
Tue Jun 07, 2016 12:33 pm
Forum: General Model Railway Discussion / News
Topic: Concrete sleepers
Replies: 11
Views: 2015

Re: Concrete sleepers

Conquerorofchobham wrote:Would I be correct in saying that the only oo gauge track with concrete look sleepers is peco flexi ?

No, there is also the Exactoscale 'Fast Track' range of sleeper units and flat bottom rail which you assemble yourself, now supplied by C&L, I believe.
by Gordon H
Tue Apr 19, 2016 12:40 pm
Forum: Electronics
Topic: CDU? Yes or no?
Replies: 10
Views: 2073

Re: CDU? Yes or no?

...but selecting routes 1 or 2 causes two solenoids to be fired in series, which draws a lot of current and may not work... Actually, two in series only draw half the current that a single solenoid would, because you have doubled the resistance in the circuit. The reason it is unlikely to work is t...
by Gordon H
Sun Apr 17, 2016 11:20 am
Forum: Electronics
Topic: 2-wire point motor operation
Replies: 3
Views: 920

Re: 2-wire point motor operation

I am currently disposing of all my garden scale equipment and have multiple LGB momentary switch machine (point motor) control boxes. A power booster much like a capacitor discharge unit powers the momentary control boxes. A momentary pulse of power is sent to the point motor using two wires only. ...

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