keeping HUD dry

**wedivebc** · 6th July 2005, 06:30

I was looking at building a new po2 monitor and decided on a HUD style. I have a working prototype that I need to take under water and I'm looking for an off-the-shelf waterproof box to put it all in. The circuit board will be about 1/2 the size of a pack of cigs including 9v battery.
I am using a single 2 colour LED and a flash sequence similar to the Shearwater HUD except I am using 1 sensor so it will sequence once per cycle instead of 3 times. (for now)
My intention is to use ambient pressure for the housing and since the led needs no servicing I'll just encase it in epoxy.
Any thoughts on the above please feel free to comment.

Scuba_Vixen · 6th July 2005, 11:16

Quote: (Originally Posted by wedivebc)

I was looking at building a new po2 monitor and decided on a HUD style. I have a working prototype that I need to take under water and I'm looking for an off-the-shelf waterproof box to put it all in. The circuit board will be about 1/2 the size of a pack of cigs including 9v battery.
I am using a single 2 colour LED and a flash sequence similar to the Shearwater HUD except I am using 1 sensor so it will sequence once per cycle instead of 3 times. (for now)
My intention is to use ambient pressure for the housing and since the led needs no servicing I'll just encase it in epoxy.
Any thoughts on the above please feel free to comment.

How about the box that guy in south africa uses.

I think one of the folks on the board here used it for his HUD too.

http://insane.bug-e.net/Puffer/PPO2/index.html

Darlene

6th July 2005, 06:30	#1 (permalink)
wedivebc Dave Tomblin Current Rebreather/s: Megalodon Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Other CCR Join Date: Feb 2005 Location: Vancouver Island BC Canada Posts: 1,510	keeping HUD dry I was looking at building a new po2 monitor and decided on a HUD style. I have a working prototype that I need to take under water and I'm looking for an off-the-shelf waterproof box to put it all in. The circuit board will be about 1/2 the size of a pack of cigs including 9v battery. I am using a single 2 colour LED and a flash sequence similar to the Shearwater HUD except I am using 1 sensor so it will sequence once per cycle instead of 3 times. (for now) My intention is to use ambient pressure for the housing and since the led needs no servicing I'll just encase it in epoxy. Any thoughts on the above please feel free to comment. __________________ Cheers, Dave.... Man is the only animal burdened with the knowledge he will eventually die
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6th July 2005, 11:16	#2 (permalink)
Scuba_Vixen e/mCCR Dolphin Pilot Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: May 2005 Location: St. Croix USVI Posts: 557	Quote: (Originally Posted by wedivebc) I was looking at building a new po2 monitor and decided on a HUD style. I have a working prototype that I need to take under water and I'm looking for an off-the-shelf waterproof box to put it all in. The circuit board will be about 1/2 the size of a pack of cigs including 9v battery. I am using a single 2 colour LED and a flash sequence similar to the Shearwater HUD except I am using 1 sensor so it will sequence once per cycle instead of 3 times. (for now) My intention is to use ambient pressure for the housing and since the led needs no servicing I'll just encase it in epoxy. Any thoughts on the above please feel free to comment. How about the box that guy in south africa uses. I think one of the folks on the board here used it for his HUD too. http://insane.bug-e.net/Puffer/PPO2/index.html Darlene
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