Elec wiring Question

T

Tony

Model railways
May seem daft to you boffin types but 2 questions
1 is there a way of wiring an led so it lights no matter which way the polarity eg for coach lighting

and
2 Is it possible to feed a control box (regulator) Eg LGB 5007 with 2 Transformers there by increasing the amps or doesnt it work like that

Tony
 
To answer 1, yes, you need a bridge rectifier, basically a gang of diodes set up like this which you can make, or buy off the shelf at Maplins. Will accept AC and clean it to DC or make DC the same output regardless of input (which is what you want).
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2, dunno, sounds like an expert question.
 
Wobbleboxer said:
To answer 1, yes, you need a bridge rectifier, basically a gang of diodes set up like this which you can make, or buy off the shelf at Maplins. Will accept AC and clean it to DC or make DC the same output regardless of input (which is what you want).
images


2, dunno, sounds like an expert question.
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Almost................Bridge rectifer will work for polarity but won't regulate voltage.............you need a regulator as well for that, I'm sure Neil has a diagram for you..................

#2 no you can't without some other circuitry to go with it LGB used to make a box to combine the output from two into one..............................
 
1/ See post number 2.

2/ Short answer no. Longer answer, not a good idea as by paralleling both inputs and outputs you risk causing circulating currents between the two transformers.
Just get a more powerful transformer.
 
Thanks guys thought as much to number 2 but read you could on some USA site, its ive got loads of 2amp ones which are fine for one loco so think il isolate the mainline into two sections and have one for each then i can run two locos at same time
many thanks again
Tony
 
Yes you can parallel two identical transformers.
As long as they both have the same impedence, with in approx 8% and are wired in phase, they will share the load equally.
 
spike said:
Yes you can parallel two identical transformers.
As long as they both have the same impedence, with in approx 8% and are wired in phase, they will share the load equally.
Click to expand...

Highly dangerous in a domestic situation as if you unplug one you have full mains voltage on the pins of the plug!!!!!!!!!!!!!!!!!!!!!!!
 
or just wire them to the same plug then that can never happen.
 
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