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Thread: Dinas Silica Mine.

  1. #1
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    Default Dinas Silica Mine.


    Had a quick outing to this mine to try some pics with an Oldham LED conversion.



    Lower Workings.


    Lowest level above water table.





    General shot of haulage level, bit too much exposure!


  2. Thanks given by: Coal Cutter, crickleymal, Foxylady, gunthoMASSER!, krela, Locksley, lost, Sausage, thompski
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  4. #2
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    Cracking! Are you on AN by any chance?

  5. #3
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    Default Dinas Silica Mine.


    Quote Originally Posted by Coal Cutter View Post
    Cracking! Are you on AN by any chance?
    Yep, I am. The pics were taken with this modified 300 lumen Oldham, you've probably seen it before.:)

    Last edited by Engineer; 20th Mar 10 at 14:04.

  6. Thanks given by: Coal Cutter, the harvester
  7. #4
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    Wonderful, that Oldham lamp really cuts through the darkness!

  8. #5
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    Default Dinas Silica Mine.


    Quote Originally Posted by lost View Post
    Wonderful, that Oldham lamp really cuts through the darkness!
    Thanks,:) some old pics here, combination of carbide, standard Oldham and 250,000 CP handlamp.

    https://www.derelictplaces.co.uk/main/showthread.php?t=5689

  9. #6
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    Some good pictures there Engineer, been in there a few time myself to play with the camera. The light looks good to, any possibility of a picture of it from the front.

  10. #7
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    Default Dinas Silica Mine.


    Quote Originally Posted by Mole Man View Post
    any possibility of a picture of it from the front.
    It's been tidied up a bit since the pic.



    The base unit is a Cree R2 unit reputed to be 300 lumen.



    The Oldham reflector has been discarded and a heat sink assembly made up to dissipate the extra heat.



    Finally the contacts have been modified to connect with slip rings on the rear of the heat sink.




    Edit: the pics with this lamp were 15 sec @ f2.8 with the light stationary.
    Last edited by Engineer; 20th Mar 10 at 22:12.

  11. #8
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    Thanks for that Engineer, thatís very good when I have done Oldham conversions I have taken the guts out and fitted a heat sink inside the light, will have to see if I can do something along the lines of what you have.

  12. #9
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    Default Dinas Silica Mine.


    I originally copied the rough design from a similar set up seen on another forum with some of my own modifications.

  13. #10
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    I am currently using a three mode driver pcb, and a cree xlamp led running at 228lm on full power which is 1 amp and 14 small ledís (3mm) all inside the head set around a heatsink.

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