DIY SCUBA dive computer?

[JewishBacon]

Any SCUBA divers on here that have tried to build an arduino dive computer? I FEEL like it can be done for about $300-500 but I'm new to arduinos.  I could 3D print a wrist or BCD mount for it. However, I think I need to get some kind of bladder and mineral oil to keep all the gear out of the water, that way the pressure and temperature could still transfer to the sensors  It would most likely have to have: 

 

 

 

Water sensor to detect when to turn on  

     https://www.sparkfun.com/products/12069

 

A pressure sensor to detect depth 

     https://www.sparkfun.com/products/12909

 

A compass for navigation

    https://www.sparkfun.com/products/10530https://www.sparkfun.com/products/10530

 

A thermometer

https://www.sparkfun.com/products/11050

 

A screen

   https://www.sparkfun.com/products/10168

 

And an arduino  mainboard  

 

 

 

Edit********

mods, not really sure where to put this post, sorry 

[C0LL0SS0S]

Aren't dive computers kinda important ? 

[Paralectic]

Just buy one..

[Jord1990]

Well first off what kinda of diving do you do. And do you have another computer or depth gauge and watch. For if your self build computer breaks.

[Jord1990]

Plus how are you planning to waterproof it. Or have it calculate non deco time.

[JewishBacon]

Just buy one..

 

I already have a basic one that just does deco time and depth 

 

Well first off what kinda of diving do you do. And do you have another computer or depth gauge and watch. For if your self build computer breaks.

I do mostly open water stuff, but im the process of getting master and tech. 

 

Plus how are you planning to waterproof it. Or have it calculate non deco time.

 

I want to put it in a small bag inside a 3d printed box. the bag would have mineral oil inside it, and the box would have a hole in it to allow for the water to pass pressure onto the miner oil bladder. as for the no deco time, thats just a code that references the dive tables. all the user would have to do is select the %O2 before the dive to determine which table program it references   

[JewishBacon]

Aren't dive computers kinda important ? 

ya dive computers are pretty important! 

[C0LL0SS0S]

ya dive computers are pretty important! 

Thats why I am thinking that you should probably test it pretty good

[Jord1990]

I would only use it for redundancy. And don't even use it when doing deco dives. You'll need another reliable dive computer for that.