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<body class='hmmessage'><div dir='ltr'><font style="" face="Tahoma">It can be done through IO but unless you have some objection running the fan at half speed (or so) all the time is a much easier way to do it. If you are using muffin style fans you can put a resistor in series to accomplish that. For 12V fans a 30-100 ohm 1/2W resistor works good. Usually only a small amount of air across a heatsink is required for cooling so you can experiment with the proper speed. You could even use PTT to change the speed when you TX if you desire. I have not found that to be necessary. <br><br>If you can find surplus 24V fans they run great on 12V without a resistor.<br id="FontBreak"></font><br><b><font style="font-size:16pt;" size="4">73 Doug</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">WA3DSP</font><font style="font-size:16pt;" size="4"><br></font><font style="font-size:16pt;" size="4">http://www.crompton.com/hamradio</font></b><font style="font-size:16pt;" size="4"><br></font><br><br><div><hr id="stopSpelling">Date: Sun, 3 Aug 2014 10:06:40 -0600<br>From: electricity440@gmail.com<br>To: app_rpt-users@ohnosec.org<br>Subject: [App_rpt-users] Simple I/O interface<br><br><div dir="ltr">Hi,<div><br></div><div>I have some cooling fans. </div><div><br></div><div>I would like to have the fans turn ON when the radio transmits, and stay on for sixty seconds after the radio stops transmitting and then turn off. </div>
<div><br></div><div>I would like to use the I/O interface on my URIx. (The I/O will then trigger a Solid State Relay ,and then turn on the Fans)</div><div><br></div><div>How can I do this with the software? Can I write it with Scripts?</div>
<div><br></div><div> What commands would I need to detect if it is sending a PTT, detect PTT off, wait time, turn the output to high, turn the output to low, always "look" for a TX, etc.</div><div><br></div><div>
Example code is always really nice for a beginner like me :-)</div><div><br></div><div>73</div><div><br></div><div>Skyler</div><div>KDØWHB<br><div><div><br></div>-- <br><div dir="ltr"><font color="#38761d" face="arial narrow, sans-serif">Skyler Fennell</font><div>
<font color="#38761d" face="arial narrow, sans-serif"><a href="http://amsatnet.info" target="_blank">amsatnet.info</a></font></div><div><font color="#38761d" face="arial narrow, sans-serif">KDØWHB</font></div><div><font color="#38761d" face="arial narrow, sans-serif"><a href="mailto:electricity440@gmail.com" target="_blank">electricity440@gmail.com</a></font></div>
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