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$1 RADIO CONTROL !!
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 Posted: Fri May 24th, 2013 05:18 am
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Tramcar Trev
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Thanks for that Dave, I think my inability to post pics may be due to my outdated operating system....



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 Posted: Fri May 24th, 2013 11:31 pm
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Tramcar Trev
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Haveing done this I now realise there is no circuit protection so I will install miniature 1.5Amp thermal circuit breakers so that in the event of a major short the tram wont get welded to the track....
Even though each tram draws around 2.5 amps the 1.5 amp thermals will be ok as they hold for around 1 hour on 150% of their rating....



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 Posted: Thu Oct 27th, 2016 01:10 pm
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Si.
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$1

[toast]

Top tip Trev !

There are quite a number of household R.C. devices around these days.

The POWER HANDLING of the unit, could be quite useful for old Lionel stuff.

:moose:

Si.

Price is unbeatable !!



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 Posted: Thu Oct 27th, 2016 03:34 pm
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Helmut
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I bought one of these ( Yes, you can also buy them in Germany ) and for my taste the dimming speed is too slow for reasonable vehicle control. IMHO it is not suitable for children operating a train. In case of emergency you can use the 'On/Off' button to stop it immediately, though. It is a matter of taste whether you deplore the non-existing means of remote direction reversal or not. It is for someone who doesn't want to bother much about the space needed and wants something he can set up out of the box, being cautious enough to cope with the handling constraints.
The dimming degree settings are kept when you switch it off or even disconnect the battery supply. So a sort of additional circuitry ( called a window-comparator ) could be used to operate a reversing relay at 50% setting, but there's nothing to be had ready-built and if you consider the additional costs to make one yourself - you'll be better off with another product giving you full control from the start.

Lest I forget: There's another serious drawback of all those coded systems:
They all use the same frequency, and distinguish their instructions only by an address header. So if you start to operate two or more vehicles simultaneously, the reaction time will go up depending on the repetition rate of each transmitter, or they will even cancel themselves out altogether.

Last edited on Thu Oct 27th, 2016 04:00 pm by Helmut



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 Posted: Thu Oct 27th, 2016 07:37 pm
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Reg H
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Is there perhaps a way to incorporate a polarity change in the pole swap???

Just thinking out loud here.

Not sure how it could be done...

Separate leads from the wheels and the poles to the motor and some diodes maybe???

Reg



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 Posted: Thu Oct 27th, 2016 08:18 pm
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Herb Kephart
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Easy-peasy (sneezy also)

http://www.freerails.com/view_topic.php?id=5255&forum_id=53

There is an easy way for a double pole car--but only works when the wire is one of the power conductors.

Each pole is connected to a motor brush
Both pole hold down hooks are connected to ground (the rails).
Changing the poles reverses the  current going through the motor.

Hoib



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 Posted: Thu Oct 27th, 2016 08:25 pm
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oztrainz
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Hi Reg,
perhaps if the pole pivot was attached to a 180 degrees rotary switch under the roof wired the other way for the other direction?

I think Trev had something like that working. Have you checked out his blog at http://trevs-tramway.blogspot.com.au/. There might be some information there that might help?



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 Posted: Thu Oct 27th, 2016 08:48 pm
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Helmut
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@Herb
this clever solution works only when you also control the motor by this voltage. Alas, we are talking R/C here.

Of course you can use a 2-level rotary switch that is connected to the pole's stem and turn it 180 degrees to make a polarity change. If you don't have one in your scrapbox, it may be costly. But- it is a solution for tram modelers only. The steam/diesel etc. guys should consider using a DPDT switch instead.



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 Posted: Thu Oct 27th, 2016 09:57 pm
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Reg H
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Helmut wrote:
@Herb
this clever solution works only when you also control the motor by this voltage. Alas, we are talking R/C here.

Of course you can use a 2-level rotary switch that is connected to the pole's stem and turn it 180 degrees to make a polarity change. If you don't have one in your scrapbox, it may be costly. But- it is a solution for tram modelers only. The steam/diesel etc. guys should consider using a DPDT switch instead.


Radio controlled. How did I miss that? That is the focus of the thread.

Still, if you are drawing power from the track and the overhead...

If I get a few minutes I will see if I can noodle it out. There oughta be a way.

Reg



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 Posted: Fri Oct 28th, 2016 03:45 am
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W C Greene
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Well now...I will chime in on this. MY OPINION-steam and diesel locos controlled with r/c and onboard batteries are "the most realistic way" to operate. HOWEVER, I think (and have always thought) that model traction, streetcars, etc...which run with an overhead wire and negative grounding the tracks SHOULD be operated with live wire overhead and ground on the tracks...just like the real ones. If you use r/c to control them, it seems to be a "natural". In my world, there are no power wires to real railroad track but electrified lines (light rail, trolleys) do indeed have wired track! That said, I know that I may be in the minority but if you run steam or diesel locomotives then you should have NO TRACK WIRING...Get it?

THE ABOVE WORDS ARE THE RANTS OF AN AGING OLD FART AND DO NOT REFLECT THE VIEWS OF THIS STATION.....

Woodie



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