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Good afternoon Collin,<br>
<br>
I'm wonering if a 64x CD/DVD drive wouldn't work for you. If the
speed isn't as high as you need, perhaps thinning the coating to
allow better flow at a lower speed would help.<br>
<br>
Regarding the parallel plate capacitor test fixture ... calibrate
out the fixture with your existing LC meter ... just make it to fit
your mechanical requirements.<br>
<br>
Computer-controlled single axis stepper ... 1.44" floppy drive ...
already has the stepper motor (tiny as it may be) ... if possible,
perhaps you could define your requirements.<br>
<br>
I've quite a bit of experience with high current/low voltage
switching ... if your load is constant, the snubber design is fairly
easy; again, some additional requirements please.<br>
<br>
I'm working on tunable inductors (up to around 26-30 uH without the
shorted-turns or the tesla coil (open end) issues ... was working on
a balanced/unbalanced kilowatt-level tuner for 2-30 MHz. If you're
working in VHF/UHF/microwave region I'll have to stand off (work
conflict).<br>
<br>
Think the 3D printer gang has already done quite a bit with PID-loop
controlled extruder temperature control ... no sense in reinventing
that particular wheel. <br>
<br>
The Royar induction heater looks quite simple ... IRF540 mosfets are
fairly inexpensive, but should have good heat sinks. I pull the big
aluminum ones from the computers getting scrapped at work. You will
need to mill down the chunk that actually sits on the processor,
think they are 3x5 with 2.5" fins (IBM/Lenovo desktops from 7-8
years ago). Still a few hanging around ... let me know if this will
help. BTW, the HP Server power supplies ($20-40 each used) run on
220 and will provide 50 volts at around 50 or so amps ... certainly
big enough to power your heater.<br>
<br>
Hope this helps.<br>
<br>
Regards,<br>
<br>
Rick<br>
<br>
<br>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 7/24/2014 6:10 PM, Collin Ladd
wrote:<br>
</div>
<blockquote
cite="mid:CAEyb0JhwR0WOrbDqyPu_v_w0KpRKy1R1Z+prX_dWJEgXy2qbDw@mail.gmail.com"
type="cite">
<div dir="ltr">... Snip <br>
<p><b>FYI to the whole group,<i> </i>from now to December I am
full to the brim with electronics projects for the grad
students. Any takers? So far I have:</b></p>
<p><b>-- This spin coater</b></p>
... snip<br>
</div>
</blockquote>
<br>
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