[PSUBS-MAILIST] arduino or microchip?

[Steve McQueen via Personal_Submersibles]

While the technology is available there is a lot to be said to keeping a
system such as a scrubber simple : )

Steve

On Fri, Nov 14, 2014 at 1:46 PM, Alan James via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi Roberto,
> I am intending having a PLC with sensors inputting to it.
> I hadn't thought of feeding a CO2 sensor to it own though. Had only looked
> at the full units
> that go for around $500-. I see I can get a CO2 sensor for $35-
> https://www.futurlec.com/Gas_Sensors.shtml
> Rebreather divers have O2 systems operated by computers & use 3 X O2
> sensors.
> James Cameron had his life support system for his dive to the Marianas
> Trench
> built by a British rebreather manufacturer & based on the rebreather
> system.
> I think it's important to have in your O2 system a pediatric flow
> regulator that is
> set slightly below your minimum O2 requirements.
> This will flow in O2 continuously & be a fail safe. They are very cheap.
> You can then add the balance of O2 required by a computerized system, or a
> bellows add system (unit can be bought from Nuytco ) or mearly manually add
> O2 with a valve, as required.
> Alan
>
>   ------------------------------
>  *From:* roberto alvarez via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* personal_submersibles at psubs.org
> *Sent:* Saturday, November 15, 2014 6:17 AM
> *Subject:* [PSUBS-MAILIST] arduino or microchip?
>
> Good Morning, first i am not an electronics master, was working on the co2
> scrubers , then  my imagination again move ahead of my hands and make me
> thik that the scruber must be inteligent,  based on the parameters
> cabin pressure,CO2 , O2 concentration and temperature,  i think that will
> be helpfull a device for monitor this conditions, found a programable board
> with the optional  sensors, the UNO ( 4 dlls on ebay ) the barometric
> pressure sensor ( 2 dlls on ebay )  the carbon monoxide sensor ( 4 dlls) ,
> tilt sensors (1.75 usd) and many other sensors
> with this info, this boar will check cabin pressure and co2 %, the boar
> can activate a relay to let oxigen enter and keep a safe enviroment
> also the tilt sensors can help me to control position in low visibility
> conditions, may be will need 3 boards and several sensors that will let me
> have an auxiliar control system
>
> Another system that i need develop  or know if can be develop or find is a
> neutral bouyancy , based in flow of water on the vertical axle, this black
> box ( because i dont know what will have inside )  will control valves on
> the variable ballast system
> just my ideas, if this is for sale some were ,please tell me to consider
> with the arduino a complet system looks to be below 100 usd as will be
> common sensors ans actuators ( relays )
> i draw a system using just relays and mercury switches ( the ones that
> stop the outboard when tilt,or on the ac thermosthats )  buw will take a
> big space and many meters of wire, will be a heat source , a single boar
> can solve this, buti need your comments, thanks
>
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