<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1416077221906_2675" dir="ltr"><span>Hi Steve,</span></div><div id="yui_3_16_0_1_1416077221906_2675" dir="ltr"><span id="yui_3_16_0_1_1416077221906_2818">yes agree. I may not have been clear.</span></div><div id="yui_3_16_0_1_1416077221906_2675" dir="ltr"><span id="yui_3_16_0_1_1416077221906_2812">Didn't mean for the scrubber to be on any automated control.</span></div><div id="yui_3_16_0_1_1416077221906_2675" dir="ltr"><span id="yui_3_16_0_1_1416077221906_2811">However thinking about it, with a PLC you could easily control the speed of the scrubber fan </span></div><div id="yui_3_16_0_1_1416077221906_2675" dir="ltr"><span id="yui_3_16_0_1_1416077221906_2815">from the CO2 sensor readings, to cut down on noise & power consumption.</span></div><div id="yui_3_16_0_1_1416077221906_2675" dir="ltr"><span>Alan</span></div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1416077221906_2729"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1416077221906_2728"> <div dir="ltr" id="yui_3_16_0_1_1416077221906_2809"> <hr size="1" id="yui_3_16_0_1_1416077221906_2855"> <font size="2" face="Arial" id="yui_3_16_0_1_1416077221906_2810"> <b><span style="font-weight:bold;">From:</span></b> Steve McQueen via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b id="yui_3_16_0_1_1416077221906_2925"><span style="font-weight: bold;" id="yui_3_16_0_1_1416077221906_2924">Sent:</span></b> Sunday, November 16, 2014 5:17 AM<br> <b id="yui_3_16_0_1_1416077221906_2927"><span style="font-weight: bold;" id="yui_3_16_0_1_1416077221906_2926">Subject:</span></b> Re: [PSUBS-MAILIST] arduino or microchip?<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1416077221906_2727"><br><div id="yiv2957877806"><div id="yui_3_16_0_1_1416077221906_2726"><div dir="ltr" id="yui_3_16_0_1_1416077221906_2807"><div id="yui_3_16_0_1_1416077221906_2808">While the technology is available there is a lot to be said to keeping a system such as a scrubber simple : )<br clear="none"><br clear="none"></div>Steve<br clear="none"></div><div class="yiv2957877806gmail_extra" id="yui_3_16_0_1_1416077221906_2725"><br clear="none"><div class="yiv2957877806gmail_quote" id="yui_3_16_0_1_1416077221906_2724">On Fri, Nov 14, 2014 at 1:46 PM, Alan James via Personal_Submersibles <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span> wrote:<br clear="none"><blockquote class="yiv2957877806gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;" id="yui_3_16_0_1_1416077221906_2723"><div class="qtdSeparateBR"><br><br></div><div class="yiv2957877806yqt6470858067" id="yiv2957877806yqt08809"><div id="yui_3_16_0_1_1416077221906_2722"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;" id="yui_3_16_0_1_1416077221906_2721"><div dir="ltr" id="yui_3_16_0_1_1416077221906_2806"><span>Hi Roberto,</span></div><div dir="ltr" id="yui_3_16_0_1_1416077221906_2803"><span>I am intending having a PLC with sensors inputting to it.</span></div><div dir="ltr" id="yui_3_16_0_1_1416077221906_2802"><span id="yui_3_16_0_1_1416077221906_2805">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_1416077221906_2801"><span id="yui_3_16_0_1_1416077221906_2928">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_1416077221906_2804"><span id="yui_3_16_0_1_1416077221906_2930"><a rel="nofollow" shape="rect" target="_blank" href="https://www.futurlec.com/Gas_Sensors.shtml" id="yui_3_16_0_1_1416077221906_2929">https://www.futurlec.com/Gas_Sensors.shtml</a><br clear="none"></span></div><div dir="ltr" id="yui_3_16_0_1_1416077221906_2931">Rebreather divers have O2 systems operated by computers & use 3 X O2 sensors.</div><div dir="ltr" id="yui_3_16_0_1_1416077221906_2932">James Cameron had his life support system for his dive to the Marianas Trench</div><div dir="ltr" id="yui_3_16_0_1_1416077221906_2933">built by a British rebreather manufacturer & based on the rebreather system. </div><div dir="ltr">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_1416077221906_2731">set slightly below your minimum O2 requirements.</div><div dir="ltr" id="yui_3_16_0_1_1416077221906_2730">This will flow in O2 continuously & be a fail safe. They are very cheap. </div><div dir="ltr" id="yui_3_16_0_1_1416077221906_2720">You can then add the balance of O2 required by a computerized system, or a </div><div dir="ltr">bellows add system (unit can be bought from Nuytco ) or mearly manually add</div><div dir="ltr">O2 with a valve, as required.</div><div dir="ltr">Alan</div><br clear="none"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr"> <hr size="1"> <font face="Arial"> <b><span style="font-weight:bold;">From:</span></b> roberto alvarez via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> <a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> <br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Saturday, November 15, 2014 6:17 AM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> [PSUBS-MAILIST] arduino or microchip?<br clear="none"> </font> </div> <div><div><div class="yiv2957877806h5"><br clear="none"><div><div dir="ltr"><div><div><div><div><div>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 clear="none"></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 clear="none"></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 clear="none">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 clear="none"><br clear="none"></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 clear="none"></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 clear="none"></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 clear="none"></div></div><br clear="none"></div></div><span class="yiv2957877806">_______________________________________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"><br clear="none"><br clear="none"></span></div> </div> </div> </div></div></div><br clear="none">_______________________________________________<br clear="none">
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