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drywh

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drywh last won the day on July 21 2020

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About drywh

  • Rank
    Triggerfish

Profile Information

  • Gender
    Male
  • Location
    Hongkong

Additional Info

  • Show Country Flag:
    Hong Kong
  • Camera Model & Brand
    Olympus EM5ii
  • Camera Housing
    Meikang

Recent Profile Visitors

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  1. drywh
    I have been using seafrog housing and have never had a problem.
  2. drywh
  3. drywh started following DIY Underwater strobe, GN58
  4. drywh
    DId two Underwater strobe
  5. Kraken de Mabini

    Triggerfish shows us two photos of his simple and ingenious trigger.  The parts list is:

    T6 LED, two, available as CREE XML T6 on eBay.  Mouser Electronics and similar  may also sell them, but eBay is cheaper.

    23A-12V battery, the Duracell 21/23 model may be the best.

    TIP-22 transistor from Mouser or Digikey electronics.

    Roer RS black part shown in photo may be a Roer RockerSwitch, need clarification.

    Resistor 1K. 

    Connector, need suggestion.

    Board and mount for the LEDs and components.
    Please make suggestions, additions and corrections to the above.

      Let us hope another knowledgeable Wetpixeler will design and publish  a TTL board. 

     

  6. drywh
    Just returned from Anilo, took some photos and tested my strobes。 And some internal construction photos
  7. drywh
    Light passes through the interface between water and glass and is incident vertically. So that's the same.
  8. drywh
    Prism is the best maybe ， Since optical paths are reversible, the opposite arrangement is also true.
  9. drywh
    Convex lenses converge light. Convex lenses must be placed in air, not in water.
  10. drywh
  11. drywh
  12. drywh
    twins
  13. drywh
    ASMT-FJ60-AFJ00 AVAGO
  14. drywh
    It was found that each camera has an LED focus light. The power of this focus light is small, but the camera's focusing system is particularly sensitive to this orange-yellow light. Because the camera case blocked the camera's focus light, I specifically looked for On a few of these focusing LEDs, requesting the factory to customize this light. On land test, the camera will focus quickly. When you take a pic with flash, there is not any visible orange-yellow spots in the photos. This orange-yellow Light will not scare the creatures in the water maybe.
  15. drywh
    updated version to be continued
  16. drywh
    Hi ! I don't think that the potentiometer is not broken, it just rusts the surface. I didn't continue to fix the flash because I saw that an electrolytic capacitor on the board had been corroded by seawater to leave only a little bit, so it is inferred that there are many electronic parts that are also affected by seawater, if I need to fix it. Spend a lot of time and look for problems one by one. If you know exactly which part is broken, then this fix is ​​easy and worthwhile. If the potentiometer is broken and you can't find a potentiometer with the same shape, I can find the same carbon film inside from other potentiometer , just replace the carbon film. I don't think that the potentiometer is not broken, it just rusts the surface. I didn't continue to fix the flash because I saw that an electrolytic capacitor on the board had been corroded by seawater to leave only a little bit, so it is inferred that there are many electronic parts that are also affected by seawater, if I need to fix it. Spend a lot of time and look for problems one by one. If you know exactly which part is broken, then this fix is ​​easy and worthwhile. If the potentiometer is broken and you can't find a potentiometer with the same shape, you can find the same carbon film inside, just replace the carbon film.
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