<div dir="ltr"><div><div>I figured it either turned invisible or was ultimately made up and was thus illusive!<br><br></div>=D<br><br></div>Some pics which I thought I attached to the first message<br></div><div class="gmail_extra">
<br><br><div class="gmail_quote">On Sun, Sep 29, 2013 at 10:13 AM, David McKenzie <span dir="ltr"><<a href="mailto:k1fsy@vhfwiki.com" target="_blank">k1fsy@vhfwiki.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div><div><div>In anticipation of assembling the link in some sort of "final" configuration, I decided that in lieu of the illusive Nomic that was originally destined for this project I would put together a plug-in board for the RasPi that has similar features.<br>
<br></div>I have 3 copies of the board being printed (at the bargain price of $15). It exposes seven GPIO ports for PTT and other features of the radio that may or may not need to be controlled, and the pins from the header also allow for "green wire" mods for analog or digital inputs if necessary.<br>
<br></div>It also has +5V/GND connection to power the raspi from an external powersupply/voltage converter rather than USB.<br><br></div>There are two 3.5" stereo phone plugs, one plugs into "audio out" from the RasPi itself, the other is for a monitor speaker if desired. Audio from the rig to the RasPi is to connect directly to the USB sound dongle (not in the schematic), and audio/ptt out to the rig is via an RJ45 jack with jumpers to select which pins do what. The audio from the RasPi to the radio goes through an isolation transformer and can be varied in level by a 10k pot. I "borrowed" the audio circuit from the Nomic schematic (it's identical to pretty much every other rig audio interface circuit I saw as well), so hopefully it works out ok.<br>
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