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  1. Pao

    DIY Nitrox Analyzer (Arduino based)

    Not on the product specs. These are generic "Chinesium" parts so you are not really sure. The symptom is you get "auto power off" after about 2 minutes or so. You have to turn it off and on again to make it power up again. You can look at this as a "feature" or an annoyance. :)
  2. Pao

    DIY Nitrox Analyzer (Arduino based)

    Nice! Can you share the plans and code? :-)
  3. Pao

    DIY Nitrox Analyzer (Arduino based)

    Hi. That is a constant preset for x2 gain and corresponding voltage range of the ADS1115 ADC . Here is a snippet in the example sketch for it: // The ADC input range (or gain) can be changed via the following // functions, but be careful never to exceed VDD +0.3V max, or to // exceed the...
  4. Pao

    Closed Apeks first stages

    That type of handwheel was used in the late 90's and early 2000's.
  5. Pao

    Wanted Heavy SS plate

    You can always stack 2 plates together.
  6. Pao

    Stepping back from customer service on Scubaboard

    Good for you. I always believe in separating work and "play" as much as possible.
  7. Pao

    How to fix Halcyon outer shell?

    Sewn patch + Aquaseal. This BC is 12 yrs old but the bladder has been replaced recently. The rips come from using the "handle" when changing tanks. You should use the shoulder straps instead.
  8. Pao

    Limited Edition 2020 Teric now available

    Probably a PVD coat. Quality depends on how much the manufacturer wants to spend on it.
  9. Pao

    Limited Edition 2020 Teric now available

    Was the color scheme particularly targeted towards the Chinese market?
  10. Pao

    Regulator wheezing - apeks xtx 200

    Happened to me on an DST (XTX 50). Someone told me to swap out the main spring for another one. I rebuilt it and the noise went away. I then found out that I still used the old spring. :D
  11. Pao

    For Sale Olympus TG-5 Black

    PM Sent.
  12. Pao

    O2 better than 50% for single deco gas dives?

    I found this interesting since I am currently certified at this level (AN/DP). The argument that minimum gas requirements will be increased is a factor, but running ZHL-16C GF 50/75 yields only a 300 liter difference in the projected back gas requirement (14 bar for 2 x 11 liter tanks). But...
  13. Pao

    O2 better than 50% for single deco gas dives?

    Scubatech Philippines (run by the perma-banned Devon Diver) recently posted a link to this paper. Although the sample size is small, it makes for a very interesting read. Does it mean that if you are limited to a single gas for deco, 100% would be much better? It it is right smack at the allowed...
  14. Pao

    Apo Reef - thoughts?

    I did APO reef just last March. Jump-off point was Batangas (~2-2.5 hrs drive south of Manila). Diving was nice and mostly pelagics but not the really big stuff. There were a few sharks, groupers, wrasses, sweet lips and turtles. Marine/coral life was much more vibrant compared to Anilao/PG...
  15. Pao

    Need replacement oxygen analyzer for intermittent use. Long lasting sensors?

    I made my own Arduino based analyzer which is sensor brand neutral/agnostic and just buy any "reasonably priced" sensor such as the ones offered by Dive Gear Express. DGX also has a sensor for the palm D that claims to have a 36 month life. I might try that once my current one is consumed.
  16. Pao

    Calm-headed response

    Looks like a dislodged O-ring, maybe the hand wheel was loose. From his earlier actions, I was half expecting him to try to re-seat it after he shut the valve down. Finding an alternate air source and bolting to the surface has always been ingrained during open water training.
  17. Pao

    3 Reg Failures

    Wet gas and frozen regs? The missing o-ring is harder to explain. Have you made any enemies lately? :D
  18. Pao

    Normal for wing to take in cup of water every dive?

    It can happen if you are pulling the dump valve even if the wing is already empty. It is usually a sign that you need a smidge more weight, especially if you are struggling to hold your stop at the end of the dive.
  19. Pao

    Halcyon Eclipse - Bolt Issues

    Was this the extender that came with the cinch system? But that was only for the lower bolt and I never had the need to use them as I ditched the cinch after I "dialed-in" my system. That is the only thing I can think of as a bolt screwing into a 2nd bolt as the OP posted. Or has he got bolts...
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