Questions tagged [12v]
12V was a voltage standard for LEGO Trains sets from 1969-1993. It is no longer used in any modern products by LEGO.
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How to convert Passenger Train 7745 from 12V to Powered-Up?
I would like to convert the High-Speed City Express Passenger Train Set 7745 from the 12V track system to the Powered-Up system.
It seems to be trivial to exchange the old wheels with the new wheels, ...
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Which alternative electric connector is compatible with 12V plugs?
Which alternative commercial off-the-shelf electric connector matches with the LEGO 12V connector?
Are there for example mini-banana-plugs which match with the LEGO standard?
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How to run Power Functions LEDs from a 12v supply?
I am considering building a train that uses a 12v motor from the 1980s and Power Functions LED lighting. For this to work it would be necessary to run the Power Functions LED set from one of the 12v ...
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4.5v/12v connector contact problems
I have pulled out several 1970s and 1980s 4.5v and 12v motors/trains from my childhood for my children to play with. Everything is working pretty well, except that we have recurring contact problems ...
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12V LEGO train tracks splinter
I have an older 12V LEGO train (several actually) but of course the rubber tires wore out long ago.
The trains still run quite well (I even used them as a motor parts in some Technic designs), but the ...
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What is the maximum voltage for motors from Cybermaster units?
I recently bought a non-functioning Cybermaster unit [part:71797].
As the motors in there might be perfectly fine, I'd like to use them.
I could not find information on these motors (as opposed to ...
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Repairing a 12V switch motor
My son caused me to dig up my old 12V lego trains. Surprisingly they mostly work, except for one part:
https://www.bricklink.com/v2/catalog/catalogitem.page?P=70026&idColor=9#T=C&C=9
This is ...
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How can I repair a red 12v train motor from Set# 7730?
I have a LEGO 7865 Red 12 volt train motor from a LEGO 7730 train set. The motor has stopped working as it has been dropped on one of the wheels.
How can I open the motor case to effect a repair?
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Lego 12v motor axle repair
I had recently got my Lego 7730 for past Christmas and wanted to use it. I bought the Lego 7864 and went to test the red motor but all I heard was the motor and it didn't move. I decided to take a ...
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What prevents a 12V motor, when pushed by hand, from providing DC electric out?
This question is somewhat related to a similar question I asked about whether pushing a 12V train motor (such as the one below) would damage it.
See title "Set 7865: six wheeled Lego® train motor (...
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How did the LEGO 7862 Remote Controlled Decoupling and Signal work?
I've never seen this set in person, although it appears occasionally in 12V Lego train system images. I've never seen it used, or described.
How did the LEGO 7862 Remote Controlled Decoupling and ...
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Will playing with a 12V train motor by hand damage it?
This question is similar to one for PF motors.
The 12V motor bogie has considerably more resistance than does the newer PF bogie motor, which may be moved very easily when not operating.
So, if one ...
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Which train motor is more powerful, 9V or 12V?
I recently picked up LEGO bricks again and due to lack of space I'm planning to build a multilevel train layout.
I do have a descent amount of 12V track along with trains and switch points, but I was ...
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LEGO Trains 12v: Identify This?
This is a very popular picture, which almost all LEGO Trains' fans from the 1980s would recognize.
I have the train in the foreground, 7740, but not the 4th car (the red one). Can anyone please ...
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Can I use the old 4.5V and 12V blue/gray era rails with newer trains?
I have a bunch of old 12v track.
I am looking to get my son into LEGO, but I am thinking of getting the remote set so we can expand it some more.
My question is, can I connect the new track to the ...
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Electric, Plug Holder 4.5V/12V what is it for?
I have seen the Electric, Plug Holder 4.5V/12V on bricklink a few times and have often wondered what it is for.
According to Bricklink, it was only ever produced in Light Gray and appeared in 3 sets ...
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Are the blue and grey 12v train system compatible?
Are the two generations of 12v train compatible?
Eg can you combine a "blue" remote controlled point and a "grey" 12v transformer?
Main motivation for this: I have a complete "grey" set of trains, ...
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What was the 12v AC socket for on the 7864 transformer?
The 7864 transformer had, in addition of the main regulated outlet for controlling trains and a fixed 12v DC for plugging in remote controls and lights, a third socket available which provided 12v AC.
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