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Interesting note: In the book "Cache Lake Country" by John Rowlands, (C 1947) there is a plan for a crystal set with a capacitor that drags two square metal plates diagonally over each other. I realized that this design gives an inherently frequency linear variable capacitor. Just make the drive shaft plate grounded to defeat body effect.
Free buckets: Buckets are available at 1.) Bakeries, 2.) Pizza parlors, and 3.) Fast Food shops. Some may smell of pickle juice. Buckets of similar mouth diameters are available from 2 to 6.5 gallons.
Actually back in the 1960's NASA patented a pair of motor/generators that could produce constant rotational speed from variable frequency AC or constant frequency AC from a variable RPM source. Quite a trick. They used one coil driven by a fixed frequency source to print magnetic poles on the rotor and then used the rest of the stator coils to drive the rotor or in generator mode pick off the generated power.
This would make a very nice presentation box for wedding and engagement rings. Just make a cross wise cut in the dove tails and drill a hole in the upper part of the lower dove tail.
On the question of why not rotate the mold to get a bit of a central dip, Remember that we would be working with materials at 2000 degrees (F or C, I assume C) and that temperature would melt most spindles and bearings. I did see a photo where they were rotating the whole kiln to make a mirror more than 3 or 4 feet in diameter for a telescope in Arizona. I think it was Roger Angel's project.
1.) How did you do the schematic? What program?2.) How about using a colored glass jar, say red, green or blue?3.) Somewhere I have seen perforated lids, that could protect the speaker cone.
1.) Put a "Bear Bell" on your pack frame and do not silence it.2.) You need Mosquito repellant- lots of it. They will bleed you dry if you let them.3.) Magnesium Fire starter. (Doan Manufacturing is best, and test it OUTDOORS before you go.)
When I first saw the pumpkin, I thought, "He must be using a plastic mold, like the Japanese use to make cube shaped watermelons." Using clay is kind of cheating, I think.
Sockets (12V & USB) and Volt Meter are available at Quicksilver Radio .COM.
I see only one glaring error in your work: The "Z" braces should run from the lower hinge side corner to the upper latch side corner to prevent the door from sagging.
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