<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:windowtext'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='color:windowtext'>From:</span></b><span style='color:windowtext'> Personal_Submersibles <personal_submersibles-bounces@psubs.org> <b>On Behalf Of </b>via Personal_Submersibles<br><b>Sent:</b> Saturday, October 30, 2021 6:17 PM<br><b>To:</b> 'Personal Submersibles General Discussion' <personal_submersibles@psubs.org><br><b>Subject:</b> Re: [PSUBS-MAILIST] DIY CO2 monitors<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:windowtext'>Very Interesting, I used to buy a lot of parts from Radio Shack until they closed the local store.<o:p></o:p></span></p><p class=MsoNormal><span style='color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:windowtext'>I miss them,<o:p></o:p></span></p><p class=MsoNormal><span style='color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:windowtext'>Ken<o:p></o:p></span></p><p class=MsoNormal><span style='color:windowtext'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='color:windowtext'>From:</span></b><span style='color:windowtext'> Personal_Submersibles <<a href="mailto:personal_submersibles-bounces@psubs.org">personal_submersibles-bounces@psubs.org</a>> <b>On Behalf Of </b>Michael Holt via Personal_Submersibles<br><b>Sent:</b> Saturday, October 30, 2021 6:03 PM<br><b>To:</b> Jon Wallace via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br><b>Subject:</b> Re: [PSUBS-MAILIST] DIY CO2 monitors<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>For me, a very interesting thing is that Forrest Mims designed one of the monitors, and he refers to a Radio Shack part. I thought Radio Shack was long gone (like Fawcett Publications, Herbach and Rademan, J. J. Meshna, and others). It exists: <a href="https://www.radioshack.com/">https://www.radioshack.com/</a><br><br>I also thought Mims was a lot older than he turned out to be:<br><a href="http://www.forrestmims.org/biography.html">http://www.forrestmims.org/biography.html</a><br><br>That issue of <i>Make </i>also has an article on a shark tracker. That might suggest some other underwater projects.<br><br><br><br> <o:p></o:p></p></div></body></html>