NSW 45 Class O scale

Discussion in 'Non Sound Decoders' started by SMR CHRIS, Mar 9, 2017.

  1. SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    Installing DCC in a non DCC ready/compliant O scale Australian locomotive.
    The model in the work shop is a NSW 45 class RTR brass model
    It has an amazing 26 LED lights throughout the model factory fitted.
    It has a nice PC board with a set of switches that allows in DC mode you to turn on or off the lights however as nice as this is some of the Circuits are not compatible with DCC so it was a choice of remove it or modify it to convert to DCC
    The LED polarity orientation is used to have directional lighting
    And where a light needs to be on in both direction like the Cab lights they simply have 2 LED one lights forward the other lights in reverse instead of a Bridge rectifier and one LED.

    1/2 of the LED wires needed transposing so they all worked in the same polarity with the decoder doing the switching now

    A quick look at the PC board and some photos take of it and a pl an was made to modify the board this would save installing a huge number of resistors if the board could be used with tracks cut and some link wires to the decoder

    Photo below shows the spaghetti wiring and my printed out images of the PC with mods marked so much easier to see at the size af a A4 sheet than the little board.
    I only had to make up 2 additions for the marker lights operation with 2- 2k resistors

    The model has marker lights and the white ones had a very different colouring at each end so I replaced the 2 at the leading end with a similar warm white LED to the No2 end, as they were more orange as Supplied may have been Picked wrong when the models wiring was made?
    So just waiting for the adhesive on these LED's to set before a tidy up of the harness in the body and a temporary mount of the TCS G8 decoder a Job for the morning,
    This model will get a TCS WOW 5 amp sound decoder when it arrives from TCS with true ALCO sounds
    The G8 is just to get it operational.

    Wiring done the printed out photos of the little PC ready help as it is easy to follow the tracks with it this Big rather than looking with a magnifier to see where the traces go on the board

    Attached files [​IMG]
     
  2. SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    This is the model before disassembled for the install.

    Attached files [​IMG]
     
  3. Ron

    Ron Staff Member Moderator

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    And after??? :scratchchin:
     
  4. SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    Ron wrote:
    Hi Ron
    Have to wait till the morning to reassemble as the replaced LED's required glueing in position so have left to set, before securing the rest of the wiring and putting the body back together
    May be a video tomorrow as well.

    Can lights and staff exchanger light visible in this photo

    Attached files [​IMG]
     
  5. paul_l

    paul_l Staff Member Administrator

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    Think I can see Toto cowering in the corner, praying that that loco wasn't made by Heljan :avatar:

    With all that gubbins inside, you would have thought it would have easier to make DCC compatible.

    Paul
     
  6. SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    paul_l wrote:
    Yes you would think it would have been easy however every 2nd set of LED's pair of wireing had to be turned around so unsolder the pair from the board and switch then resolder, only colour coding was red or black so had to work out what did what as well before Unsoldering also there wasn't quite enough lenght to get the board away from the loco body so a degree more care was required all done now just need the sound decoder now butt He G8 will do until it arrives.
     
  7. paul_l

    paul_l Staff Member Administrator

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    Ouch, and I thought the Heljan Cl 25 was bad enough, looking forward to seeing Toto do the Heljan 37 complete with sound, may be best turning the sound off on the camcorder, as I think the language may be a bit choice :avatar:

    Paul
     
  8. cmcan

    cmcan Full Member

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    Paul

    You might not have to.Put him on a ten second delay and it could end up being a solid beep. Problem solved. Best to make sure he is not facing the camera. Some one might lip read.

    Cameron
     
  9. SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    Video link to the install photos and the lights turning on and off
    https://youtu.be/7Wj_YZ0-uM8
    Sorry I forgot to take a photo of the decoder attached
    To the roof of the loco
     
  10. Gary

    Gary Will the real Gary please stand up... Staff Member Administrator

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    Great work Chris, I'm glad that you know what you're doing..! :thumbs: Now for sound.... :giggle:

    Cheers, Gary.
     
  11. SMR CHRIS

    SMR CHRIS Staff Member Moderator

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    Gary wrote:
    Thanks Gary
    Sound is easy, the decoder that I'm waiting for is a screw figment of the wiring so just a swap decoders and install 2 speakers as the decoder looking at the specs has 2 speaker channels.:thumbs:
     

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