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<body class='hmmessage'><div dir='ltr'><font style="" color="#000000" face="Tahoma,sans-serif">Jay,<br><br> In many cases you can just leave the fan run at reduced speed all the time but if you want to control it simply why not just use the PTT line to turn it on. That would be very easy. The PTT (in most cases) goes to ground when active and it would be high not active. The only thing you have to be careful of if you connect the fan directly to the PTT line is the fan voltage should not be more than the open high state of the radios PTT. You could also build a simple keying circuit to start the fan when the PTT went low and eliminate that problem. Most people get way to carried away with fan circuits but if you want to get fancy here is an example - <br><br><a href="http://latinovoip.net/allstar-and-the-gpio-fan-script-for-dmk-engineering-uri/" target="_blank">http://latinovoip.net/allstar-and-the-gpio-fan-script-for-dmk-engineering-uri/</a><br><br id="FontBreak"></font><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">To: arm-allstar@hamvoip.org<br>From: wt9s@me.com<br>Date: Thu, 29 Oct 2015 10:18:55 -0700<br>Subject: [arm-allstar] GPIO control of fan<br><br><style><!--
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--></style><div class="ecxWordSection1">Hi folks,<BR> <BR>I’ve been running my repeater here with an Arcom RC210 controller for years. I have the repeater, an IRLP computer, and the Allstar node (now on a Pi) each connected to a port on the controller. The controller currently switches on a fan for 60 seconds whenever PTT goes active. I am thinking of ditching the IRLP and the Arcom and running my repeater with the Allstar node as the controller. I’m looking for some pointers on how to control the fan with either the URI GPIO, or the USB GPIO described in the How-Tos. I guess using the URI would be simpler.<BR> <BR>Thanks,<BR> <BR>Jay – WT9S<BR> <BR>Sent from <a href="http://go.microsoft.com/fwlink/?LinkId=550986" target="_blank">Mail</a> for Windows 10<BR></div><br>_______________________________________________
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