Snow and Radios

Recently some snow has come to Washington, so I took the opportunity to head up to the mountains and get out a bit.

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Obviously it’s an excuse to have a little fun with the Subaru. Though in actuality those tracks aren’t mine, I added to them a bit later.

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Here’s the Gold Creek Pond at the start/end of the trail that circles the pond.

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Here’s a view from a stopping point midway around the pond.

Additionally, I’ve been working on some new radio modules, primarily aimed at the projects I volunteer with at UW, but it’s designed to be as agile as possible, so it has a lot of potential uses.

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Unfortunately I don’t have them working quite right yet. They’re not being terribly friendly about accepting new program code, so it will take some more fiddling to make them work properly.

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OS X and Samba

One basic tenant of being a SysAdmin is that you must have some form of home server. Whether that’s an old Atari system that you hacked an ethernet interface onto is irrelevant. Following this tenant, I too run a home server, and one of it’s functions is to provide large file storage for the network. Archives of photos, music, movies, etc.

Samba is a open source bit of software that helps Linux computers interact with and provide file shares using the same protocol that Windows computers use. Apple originally also included Samba in OS X to support connecting to and providing these shares as well, but though various reasons that don’t really matter they decided to make their own version.

There has been quite a lot of discussion regarding performance gains/losses after Apple’s move to their own software for these services, but I had noticed particular problems after upgrading to OS X 10.9, and those problems continued in 10.10. Accessing shares was at times ludicrously slow, sometimes taking upwards of a minute just to show a directory with a dozen files in it.

However, it wasn’t the server, Linux or Windows clients were very responsive and worked well. So, it had to be something about how OS X was interacting with the server that caused problems.

Some internet posts suggested forcing a protocol downgrade by specifying ‘cifs://servername/sharename’ instead of the more usual ‘smb://servername/sharename’. I tried this, along with various permutations of config options on the server side to try and get OS X’s client to perform better. However, none of them seemed to really resolve the issue.

Eventually I found that OS X’s search function, Spotlight, indexes all connected devices, including network shares, by default. Spotlight was trying to access a million (hyperbole) files at once, and causing any other requests to be significantly delayed.

I’m not sure why it indexes things by default, but here’s how I turned it off.

Go to the Apple Menu -> System Preferences -> Spotlight. Click on the Privacy tab, and click the + button to add your Samba share.

Doing this didn’t immediately stop spotlight from indexing the drive, but after a restart the issue was gone, and it doesn’t appear to have recurred in the last few days.

Hope this helps the apparently significant number of people facing this (based on the number of people complaining about Samba performance on OS X in the google results).

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Unspecified Updates

As noted a few posts ago, I’ve been trying my hand once again at not failing to keep a plant alive, and have been keeping a watchful eye on my Meyer Lemon tree. It’s continuing to grow pretty nicely, and the lemons are starting to get fairly sizable. As winter continues to approach, the days get shorter, and the weather gets colder, I may need to move the pot inside or into the shed, and put a plant lamp on a timer so it can get the light it needs and not freeze to death.

This photo was taken nearly a month ago, and many of the lemons have about doubled or more in size since then.

IMG_1193Additionally, I got my new iPhone recently. As my phone is really the only camera I ever use, any improvements made in that regard are a real draw for me. I’ve been pretty pleased with the results it’s been spitting out. Photos are coming out really nice, and I’ve been having some fun with the 240FPS slow motion video recording. Here’s some example photos/panoramas I’ve taken with the new phone’s camera.

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Anyway, I’m pretty pleased with how well it works. I’m looking forward to finding more interesting things to catch with it.

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3D Printer

Recently a friend of mine sent me a number of parts he had laying around to get me started on building a 3D printer. The parts he sent, plus some time, and a few parts I could buy would combine into a machine for making objects out of rolls of plastic.

Once his shipment arrived, it was time for me to construct the frame, which everything else would attach to. I ended up building the frame from some finish plywood I picked up at the local Home Depot. After which came the measuring and cutting. Of course, I had my puppy helper to distract me.

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After the panels were cut, I grabbed the iPad for directions, and my finish nail gun to tack the whole thing together.

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And with the magic of the finish nail gun, nearly instantaneously a frame appeared before my eyes.

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After the frame was built, it was time to start attaching parts to it. First to come was the X axis and carriage, and the Z axis that supports it.

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Next came the Y axis which has the bed, and moves back and forth underneath the X axis.

IMG_0913Then, through the magic of not taking pictures, all the electronics get installed and the printer is complete!

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Then it came down to fiddling all the settings, and tuning things here and there, and calibration, and repeating everything, and etc, etc, until finally you get something printed!

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Hey! Look at that! It’s a box! Also, for the heck of it, I put my magnifier on the box. Oooooh 60X magnification!

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Anyway, after all the initial calibration is done, you can start doing fancy parts, like this freaking awesome gear bearing I printed!

Or this awesome vase-like-object, which maybe I’ll use to hold pens or something!

IMG_1065Or, practical things like a case for the Random Number Generator USB stick I talked about a few posts back!

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Anyway, it’s been very interesting building the printer and tuning it up to make decent prints, and I think it will find a lot of use as it dovetails in with my other electronics and hobby projects.

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Bending Acrylic

I’ve had a large 2000VA UPS here under my desk for some time, and it uses an external battery pack. The problem is, some time ago I lost the top half of the battery pack, so the batteries and the wiring was exposed.

I leaned a sheet of acrylic against it to prevent feet/dogs/falling objects from getting into the batteries, but I had always intended to construct some sort of real cover. I was fiddling around with the pack a couple days ago, and realized that if I could bend the sheet of acrylic I had stuck there temporarily, with two right angles, it could make a nice little cover.

A quick youtube search later, and I had a plan for bending the sheet.

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I used this board as both a support, as well as the form, as it was the same width as I wanted the top/middle section to be.

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After gently heating along the bend to be made, I bent down one side of the acrylic at about a 90 degree angle.

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Then I bent the other side, and cooled the piece down with some water from the garden hose.

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Unfortunately, the first bend I heated a bit too quickly, causing some sections to bubble and look less than pretty.

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But I had much better success with the second section, by heating it more slowly, the bend didn’t bubble and came out clear.

IMG_0846And finally, the cover is in place over the partially disassembled battery pack!

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