<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div dir="ltr" id="yui_3_16_0_1_1415989443443_12115"><span>Hi Roberto,</span></div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116"><span id="yui_3_16_0_1_1415989443443_12132">I am intending having a PLC with sensors inputting to it.</span></div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116"><span id="yui_3_16_0_1_1415989443443_12129">I hadn't thought of feeding a CO2 sensor to it own though. Had only looked at the full units</span></div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116"><span id="yui_3_16_0_1_1415989443443_12166">that go for around $500-. I see I can get a CO2 sensor for $35-</span></div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116"><span id="yui_3_16_0_1_1415989443443_12174"><a href="https://www.futurlec.com/Gas_Sensors.shtml" id="yui_3_16_0_1_1415989443443_12173">https://www.futurlec.com/Gas_Sensors.shtml</a><br></span></div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116">Rebreather divers have O2 systems operated by computers & use 3 X O2 sensors.</div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116">James Cameron had his life support system for his dive to the Marianas Trench</div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116">built by a British rebreather manufacturer & based on the rebreather system. </div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116">I think it's important to have in your O2 system a pediatric flow regulator that is </div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116">set slightly below your minimum O2 requirements.</div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116">This will flow in O2 continuously & be a fail safe. They are very cheap. </div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116">You can then add the balance of O2 required by a computerized system, or a </div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116">bellows add system (unit can be bought from Nuytco ) or mearly manually add</div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116">O2 with a valve, as required.</div><div dir="ltr" id="yui_3_16_0_1_1415989443443_12116">Alan</div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1415989443443_12120"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1415989443443_12119"> <div dir="ltr" id="yui_3_16_0_1_1415989443443_12118"> <hr size="1" id="yui_3_16_0_1_1415989443443_12128"> <font size="2" face="Arial" id="yui_3_16_0_1_1415989443443_12117"> <b><span style="font-weight:bold;">From:</span></b> roberto alvarez via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> personal_submersibles@psubs.org <br> <b><span style="font-weight: bold;">Sent:</span></b> Saturday, November 15, 2014 6:17 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> [PSUBS-MAILIST] arduino or microchip?<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1415989443443_12121"><br><div id="yiv7060028977"><div dir="ltr" id="yui_3_16_0_1_1415989443443_12127"><div id="yui_3_16_0_1_1415989443443_12126"><div id="yui_3_16_0_1_1415989443443_12125"><div id="yui_3_16_0_1_1415989443443_12124"><div id="yui_3_16_0_1_1415989443443_12123"><div id="yui_3_16_0_1_1415989443443_12122">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<br></div>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<br></div>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<br>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<br><br></div>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<br></div>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 ) <br></div>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<br></div></div><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br><br><br></div> </div> </div> </div></body></html>