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<p>Hi Craig,</p>
<p> Very few people on this list are going to have KiCad at their
fingertips, so I transmogrified your schematic into a PDF. Folks
may have to turn their heads sideways to look at it depending on
their PDF viewer:</p>
<p> <a
href="http://triembed.org/doc/craig-cook-coffee-roaster.pdf">http://triembed.org/doc/craig-cook-coffee-roaster.pdf</a></p>
<p> In my opinion the stuff on the left side of the schematic
should be inside an all metal box with the box connected to earth
ground by a good power cord with standard three prong AC plug
properly wired. You don't specify R1 (heater), so it isn't
possible to judge whether the current capacity of the SSR is up to
the task. Two amps seems marginal for a heater designed to heat
more than a few beans at a time.<br>
</p>
<p> R4 is too large, in my opinion, and the FET turn on time might
be very slow, but that may be a non-issue. It would be harmless
are more likely to work well if it was 100 instead of 10k ohms. D1
should be swapped end for end and have 20V on the cathode end,
not ground, to act as a snubber (i.e. it's in parallel with the
motor but only conducts in the opposite direction). The 20V of
course has to match the voltage rating of the actual motor.<br>
</p>
<p> I'm not in the position to judge the display connections. I'm
also not up on KiCad enough to judge whether you've got the
Arduino's five volts shorted to ground with the "PWR_FLAG" net,
but it seems that way. The thermistor circuit seems reasonable. <br>
</p>
<p>-Pete<br>
</p>
<div class="moz-cite-prefix">On 12/29/19 10:36 AM, Craig Cook via
TriEmbed wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1207706821.2944799.1577633782773@mail.yahoo.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div class="yahoo-style-wrap" style="font-family:Helvetica Neue,
Helvetica, Arial, sans-serif;font-size:16px;">
<div dir="ltr" data-setdir="false">Would someone be willing to
review my kicad drawing of a popcorn coffee roaster?</div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false"><a
href="https://drive.google.com/open?id=141Y2Q9tdyt8iiL_LouNO4CarcEIShBtb"
rel="nofollow" target="_blank" moz-do-not-send="true">https://drive.google.com/open?id=141Y2Q9tdyt8iiL_LouNO4CarcEIShBtb</a></div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">I have the Arduino Uno
working. Tested the thermistor, display and fan control. Have
not tried connecting the solid state relay yet.</div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">I am basing my work from this
instructable: <a
href="https://www.instructables.com/id/A-fully-automatic-coffee-bean-roaster-Arduino/"
rel="nofollow" target="_blank" moz-do-not-send="true">https://www.instructables.com/id/A-fully-automatic-coffee-bean-roaster-Arduino/</a></div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">Thanks</div>
<div dir="ltr" data-setdir="false"><br>
</div>
<div dir="ltr" data-setdir="false">Craig<br>
</div>
</div>
<br>
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