Video Archive         Recent Topics      
YMR logo

You are here:  Your Model Railway Club > Other Areas. > Trams. > End to End test To bottom of page
                 

 Moderated by: Spurno
Start New Topic Reply Printer Friendly

End to End test - Trams. - Other Areas. - Your Model Railway Club
AuthorPost
 Posted: Wed Jul 22nd, 2015 09:26 pm
PMQuoteReply
link to this 1st post
wahiba
Full Member


Joined: Mon Jan 14th, 2013
Location: Keighley, United Kingdom
Posts: 225
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

From a babani book on the 555 timer chip I put together a simple circuit on a bread board. First time I have tried anything like this. Using some HD 3 rail track I set a test length up in the garage and this is the video of it working!!

https://youtu.be/XNiOxaKkvfI

Basically the time interval is longer than the journey time. At each end one track, in this case the centre track, is cut and a diode inserted. When the train crosses the break it stops until the polarity is reversed. The time operated a dpdt relay as the reversing switch.

I now intend trying to build the circuit onto veroboard for a more permanent controller.




____________________
freelance model railways and tramways
http://www.tramcard.talktalk.net (early days)
Back To Top PMQuoteReply

 Posted: Thu Jul 23rd, 2015 07:12 pm
PMQuoteReply
link to this 2nd post
Marty
Enjoying the Journey


Joined: Sun Oct 14th, 2007
Location: Perth, Western Australia, Australia
Posts: 5859
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

Nice job, It's always a boost to the old moral when you get something like that to work
cheers
Marty



____________________
Marty
N Gauge, GWR West Wales
Newcastle Emlyn Layout.
Newcastle Emlyn Station is "Under construction"
Back To Top PMQuoteReply

 Posted: Thu Jul 23rd, 2015 11:51 pm
PMQuoteReply
link to this 3rd post
Brian R
Full Member
 

Joined: Tue Jan 22nd, 2013
Location: Preston, United Kingdom
Posts: 112
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

Nice work. It is always satisfying to get a circuit working as you intended.  My problem is that when one works I start looking for ways to improve and add to it. For me, it can take over from modelling.



____________________
Regards,

Brian

ECoS, Laptop, TrainController Gold v8
Back To Top PMQuoteReply

 Posted: Sun Jul 26th, 2015 07:16 pm
PMQuoteReply
link to this 4th post
wahiba
Full Member


Joined: Mon Jan 14th, 2013
Location: Keighley, United Kingdom
Posts: 225
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

Know what you mean. Being clever I went and made a veroboard version, which does not work. probably my dodgy soldering but I cannot find the problem. Trouble is I soldered the chip straight in not having any sockets.

So off to Maplins for a decent stock of resistors and capicitors plus a few DIL sockets. So back to the prototype board using the relay from the previous exercise. It was not the fault.

With a selection of resistors discovered that the value from the book produces a cycle nearer 7 seconds rather than the 11 the book reckons. Anyhow a bigger resistor now means a cycle time of 14 seconds which is just fine for a test length.

So before I have another go at a soldered unit I am working out the best way to adjust the time cycle by switching in various resistors!

Also rebuilt the chassis with the collector for the third rail in the centre of a bogie. This works although it means rail collection from one bogie and centre from another. Centre collector really needs duplicating. At least I am geting there. This solution was deceptively simple.

First picture is tidied up chassis with centre collector in the centre of a bogie.



Side view of bogie. Collector is just a tube with the Spanish paper holder down the centre. It is held in place by a couple of small self tapping screws through pre-existing holes on either side. Bit of spring on top helps keep it connected to the track when metal support frame is added for necessary traction.



The lastest bread board using the relay cut off my failed veroboard exercise.




Of course, all this is going on because of the lousy weather. I would not have bothered if the weather was better.

David



____________________
freelance model railways and tramways
http://www.tramcard.talktalk.net (early days)
Back To Top PMQuoteReply

This is topic ID = 13650     Current time is 10:32 pm  
You are here:  Your Model Railway Club > Other Areas. > Trams. > End to End test
You can type a quick reply to this topic here. Click in the box below to begin.

Or to reply to an individual post, or to include images, attachments and formatted text,
click the Quote or Reply buttons on each post above.

To start a new topic in this forum, click the Start New Topic button below.
To start a new topic in a different forum, click the Forum Jump drop-down list below.
Start New Topic


Back to top of page

           
15 Most Recent Topics

Problems with this web site? Please contact the Webmaster.

All material submitted to this web site is the responsibility of the respective contributor. By submitting material to this web site you acknowledge that you accept full responsibility for the material submitted.
Unless stated otherwise, all the material displayed on this web site, including all text, photographs, drawings and other images, is copyright and the property of the respective contributor. Registered members are welcome to use it for their own personal non-commercial modelmaking purposes. It must not be reproduced or re-published elsewhere in any form, or used commercially, without first obtaining the owner's express permission.
The owner of this web site may edit, modify or remove any content at any time without giving notice or reason.    © 2008

                 

Recent Topics Back to top of page

Powered by UltraBB 1.15 Copyright © 2007-2011 by Jim Hale and Data 1 Systems. Page design copyright © 2008-2013 Martin Wynne. Photo gallery copyright © 2009 David Williams.