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'Bachmann' Controller ... Thought It Was Faulty & Got Rid Of It

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Posted: Sat Mar 16th, 2019 05:19 pm

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Si.
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WOW !

...

... The C

L 'Thomas The Tank Engine' livery, Bachmann controller ... I'm Luvin' it ! ... :shocked:

... something to rival the wonderful colours of the 'McTrain' Mogul !

I'm starting to think I WANT ONE ! [whack]

Si.

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Posted: Sat Mar 16th, 2019 05:28 pm

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22^nd Post

Si.
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As well as tryin' my damnedest to find a photo of the 'guts' of the controller ... :us:

... I also tried pretty hard to find a schematic on the damn thing as well. :us:

No luck though. :f:

Here are a couple of schematics of more or less what is PROBABLY inside one ... Or very close anyway.

Both powered from about 16 Volts A.C. ... Either from a built-in transformer or a wall-wart.

Si.

Posted: Sat Mar 16th, 2019 10:03 pm

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Murray McPhie
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So you 100% HAVE GOT a '16 Volt A.C. output' wall-wart, right ?

Well nearly,

I have a 16 volt one but the connector socket is loose. So I used an 18 volt one.
I have a box full of various wall warts.
Maybe it must be 16 volt, or it will only go one way?
Like I say, it isn't that important. I can use the thing on a turntable or something.

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Murray.

I love steam locomotives. Big ones, small ones, real ones, model ones........

Posted: Sat Mar 16th, 2019 10:15 pm

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24^th Post

Si.
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Hi Murray

OK ... So the wall-wart you have is 18 Volts ...

... but the IMPORTANT question IS ...

... Have you got one that outputs A.C. Voltage ?

A wall-wart that outputs D.C. Voltage ...

... may well be causing the oDd reversing problem ! :f:

Si.

Posted: Mon Mar 25th, 2019 10:07 pm

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25^th Post

Si.
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The suspense is killing me. :old dude:

Was the 'wall-wart' a D.C. output one ...

... or one of the slightly more unusual A.C. output ones ?

I'll check back in a week or so . . .

Si.

I had actually wondered about trying to score one of these on eBay a while back. :java:

They are quite a nice 'hand sized' unit & might make a C

L radio-control 'project box' ...

... or just a nice spare & simple controller (if it works !).

Posted: Wed Mar 27th, 2019 07:35 am

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Murray McPhie
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Sorry Si,
I got a bit sidelined by other things.

I just got the transformers I have been playing with out of the box again.

Very embarrassed.

The 16 volt one which was broken is AC.
That is the one I was hoping would work for me.

The 18 volt one is DC.
I was sure it said AC, but it was after a beautiful dinner and a glass, or maybe two? of colonial red.
I MAY have misread it.

I am using the google thing to find a local supplier of 16 volt AC transformers.

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Murray.

I love steam locomotives. Big ones, small ones, real ones, model ones........

Posted: Wed Mar 27th, 2019 08:00 am

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2foot6
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How many glasses?..................

Try Jaycar in Littlejohn St, they will have them.

....Peter

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Posted: Wed Mar 27th, 2019 07:37 pm

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Murray McPhie
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Actually, last time I looked there, they didn't have any.

Strange, as they have pretty much everything.

I will drop in next time I am passing, which is often.

Thanks Peter.

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Murray.

I love steam locomotives. Big ones, small ones, real ones, model ones........

Posted: Wed Mar 27th, 2019 10:30 pm

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W C Greene
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Now, I don't know about the Botchmann "controller",
but I would imagine that it needs to have a DC power supply.
Unless the train is DCC, which has AC on the rails but is controlled by the loco's chip.
This little device is probably ment for a DC wall pack to make it work.
The thing seems to have forward/reverse and a "throttle"...
so, I think it needs a DC power supply.
If it isn't working correctly, I would find a better power pack.
I would prefer a better power pack anyway.
Look for an older MRC pack,
they can be found on fleabay, etc. for not much money.
These are only my opinions.

Woodie

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Posted: Thu Mar 28th, 2019 01:47 am

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30^th Post

Si.
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The 'Bachmann Train Controller' 100% def. DOES NEED a '16 Volt A.C.' output wall-wart ! :old dude:

A quick glance at this fairly simple MRC Tech-7 Power Pack schematic. :dope:

Shows that '15.8 V AC' is taken from before the rectifier Diodes 1 to Diode 4 ...

... & fed into the 'business' part of the throttle circuit via a 10K Ohm resistor ...

... to take advantage of & use it's handy 50/60 Hertz frequency, in the main circuit.

The MRC schematic ^^ shows a built-in transformer, with AC Cord ... :brill:

... but had it not been designed like this, a wall-wart could power it just as effectively ...

... but it would HAVE TO BE an A.C. output one of 16 Volts (or 15.8 V in MRCs case !).

I couldn't find a schematic of the actual 'Bachmann Train Controller'. :us:

Someone familiar with where their 'Service Sheets' are stashed on The Net, might find one ?

Si.

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