Model Railway Forum banner
21 - 34 of 34 Posts

· Premium Member
Joined
·
1,307 Posts
Poliss, if new DCC modellers have trouble understanding 'bus' & "radial', etc, then they would be better off purchasing a basic book on DCC such as the one by Ian Morton - Aspects of Modelling - Digital Command Control.
It is aimed at the newcomer to the hobby & I even purchased one last month when I converted to DCC even though I have been exposed to it for about 2 years.
 

· Registered
Joined
·
2,148 Posts
QUOTE (Sol @ 19 Feb 2008, 08:47) <{POST_SNAPBACK}>Poliss, if new DCC modellers have trouble understanding 'bus' & "radial', etc, then they would be better off purchasing a basic book on DCC such as the one by Ian Morton - Aspects of Modelling - Digital Command Control.
It is aimed at the newcomer to the hobby & I even purchased one last month when I converted to DCC even though I have been exposed to it for about 2 years.

An excellent book. I have a copy myself & found it very helpful. Great reading for a newcomer.
Regards.
Tony Daly.
 

· Registered
Joined
·
295 Posts
QUOTE (poliss @ 19 Feb 2008, 01:28) <{POST_SNAPBACK}>The language needs to be simplified. To most people, a bus is something you catch, radials are the tyres on the bus. Choc boxes are what you give your girlfriend on Valentines day. Daisy chains are things girls make at school.
The problem here is that the language has already been simplified, or at least adapted from elsewhere, to be rather more descriptive than precise.
This, of course, is part of the overall problem - so few people are familiar with technical matters, and the terminology involved, that these more descriptive versions become prevalent, often leading to their use in several different, and usually unrelated contexts. Spare a thought for those of us using a PCB design program which uses the term LMS for 'Library Management System'. No matter how hard I try, the obvious railway context simply refuses not to come to mind first!

From my point of view, I will admit that I find it hard not to want to know how things work, especially when they are related to my usual spheres of activity (i.e. electronics). I cannot imagine being in a position where blind acceptance of things magically working around me without at least a rudimentary understanding of the principles involved is acceptable.
 

· Registered
Joined
·
266 Posts
[ I cannot imagine being in a position where blind acceptance of things magically working around me without at least a rudimentary understanding of the principles involved is acceptable.
[/quote]

The old saying says " I don't know how the watch works but I can tell the time".

30yrs in model railways, the last 13 in DCC and the old saying has served me well.
Happy DCCing
Ian sa
 

· Registered
Joined
·
295 Posts
QUOTE (iansa @ 19 Feb 2008, 23:31) <{POST_SNAPBACK}>The old saying says " I don't know how the watch works but I can tell the time".

30yrs in model railways, the last 13 in DCC and the old saying has served me well.
Then I guess you see yourself as the Managing Director of your railway, rather than the Chief Engineer?
 

· Registered
Joined
·
266 Posts
QUOTE (Gordon H @ 20 Feb 2008, 13:26) <{POST_SNAPBACK}>Then I guess you see yourself as the Managing Director of your railway, rather than the Chief Engineer?


She who must be obeyed is the Managing Director, I am the Chief Engineer( despite not knowing how the watch works), general roustabout and everything in between.
Happy DCCing
Ian sa
 

· Registered
Joined
·
2 Posts
Hi....It doesn't matter if you are too technical or not technical enough. You cannot please all of the people, all of the time. I am very new to DCC but ran my own electronics company for 28 years. I am trying to get as much info about DCC into my noddle as my ageing grey cells will allow. If a posting gets too technical, I can either ask for further explanations or just pass on to a different posting. I am never happier than when I am learning something new so keep up the technical postings PLEASE.
Malcolm.
 

· Registered
Joined
·
104 Posts
QUOTE (Richard Johnson @ 18 Feb 2008, 14:02) <{POST_SNAPBACK}>Hello Doug

Use a 1 watt 150 ohm resistor in series with a 0.1mfd ceramic or "monolithic" capacitor. Neither is polarity conscious. wattage of the resistor isn't critical - anything 1 watt upwards will be fine if 1 watt not available locally. Cost of these parts will be less than 50p

wiring is bus wire 1 > resistor > capacitor > bus wire two.

No need to change values at all withing the normal 11~18volt range of DCC bus voltages.

Richard
DCCconcepts
 

· Just another modeller
Joined
·
9,967 Posts
QUOTE (firefly @ 17 Jun 2008, 15:04) <{POST_SNAPBACK}>Hi Richard,reference to the dcc bus radial wiring due you add stubbers to both ends or one end,thanking you Mike.

***Hi Mike
Rule of thumb is one on eac "branch" of the bust, but with a smallish to mid size layout one end is adequate.

If its bigger than the average spare room then presuming the bus is a Tee shape add one both ends.

If in doubt do it both ends / if there are three branches to the bus one on each - it can't hurt to slightly overkill their applicatiton and the parts are very cheap...

Richard
 

· Registered
Joined
·
2,148 Posts
Hi Richard.

Can the end of your bus wires be connected directly to the track or do you need to end them in a terminal block ? If connected directly to the track,you wouldn't be able to fit stubbers or does that matter ?
 

· Just another modeller
Joined
·
9,967 Posts
QUOTE (TonyDaly @ 17 Jun 2008, 17:11) <{POST_SNAPBACK}>Hi Richard.

Can the end of your bus wires be connected directly to the track or do you need to end them in a terminal block ? If connected directly to the track,you wouldn't be able to fit stubbers or does that matter ?

***Tony, by definition a bus goes under the layout and is connected to the track at many places. If it is simply one pair of wires to the track and they are short, its not a bus really - just track connections. In this case I'd connect it across the two rails at the point furthest from the two track power wires.

If yours is a true bus with droppers from the rails and you simply also connected the bus to the track at the very end, then simply add the suppression/termination across the two bus wires close to the end - the benefit will still happen.

regards

Richard
DCCconcepts
 

· Registered
Joined
·
2,148 Posts
QUOTE (Richard Johnson @ 17 Jun 2008, 12:26) <{POST_SNAPBACK}>***Tony, by definition a bus goes under the layout and is connected to the track at many places. If it is simply one pair of wires to the track and they are short, its not a bus really - just track connections. In this case I'd connect it across the two rails at the point furthest from the two track power wires.

If yours is a true bus with droppers from the rails and you simply also connected the bus to the track at the very end, then simply add the suppression/termination across the two bus wires close to the end - the benefit will still happen.

regards

Richard
DCCconcepts

Thanks Richard. Was just wondering.
 
21 - 34 of 34 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top