At the office, we decided we were going to have a stocking decorating contest for Christmas. The rules were pretty lax, so I immediately thought of interactivity and electronics and blinky lights and whatnot. Well, that, and there was no way in you-know-what that I was going to hot glue glitter and spongy letters to a stocking with electricity being involved.
Here is a video of the final product to pique your interest:
How did I do it? Easy. Some AVR programming (through my usual Arduino hackery) and some simple electronics and BOOYAH! Motion activated stocking with a Santa sign and some jingle bells.
I mentioned in an earlier post that I was working on a project that would help us to hear the doorbell out on the back patio. The problem is that the doorbells themselves are upstairs inside the house and difficult to hear. No matter how many times we tell guests to just walk in and come to the back patio, they still try to ring the doorbell and we don’t hear them.
This is also another write-up on a product for the kind folks at Element 14 (Newark.com). What item did they send me this time around? The 12-volt solenoid (Newark SKU: 20M1816) that’s going to ring my bell! This solenoid is powered by 12 volts DC. It’s super-easy to hook up: Just two wires and BOOM! They’re inexpensive and quite rugged. The hole through the center is large enough and the coil is long enough that I was able to stick a spring inside. I think I’ll be ordering some more of these. They will come in quite handy on other interactive projects.
This project is going to be remotely fire a solenoid under a 6″ brass bell mounted on the wall outside the back patio door. The solenoid will be triggered by a simple 5-volt pulse from an AVR microcontroller that will receive commands remotely over Xbee wireless from the doorbell (the doorbell side has yet to be worked out).
Here is a video of the solenoid and the bell triggering from a 5-volt button push:
This was an easy fix. Go to K & J Magnetics, Inc. and get yourself a thin little neodymium rare earth magnet. By, “thin,” I mean thinner than the cover of your DODOcase. The one I used in this upgrade was salvaged from a little laptop hard drive head servo thingy. More
I was contacted by Element 14 (Newark.com) recently about doing some product test drives using some of the products from their line card. I took two to three seconds to think about it. I know, tough one…
XBee S2 ZigBee RF modules by Digi International
I have been chomping at the bit to use ZigBee wireless technology in a project. Digi International makes some REALLY cool and easy-to-use ZigBee RF modules that bring ZigBee technology down to a level that even I can implement without more than a few terse passes at a wireless book and a couple of datasheets. So, the first piece of loot I requested from Element14 was an XBee S2 module. I would love to link you to this module at Newark.com, but it appears to be gone. That is sad. BAck to our story… There was a spending limit on my test-drive loot. I ordered one XBee S2 module on my tab. The other XBee module was sent to me courtesy of Element14.com.
The ultimate project is based on a need at our house: We hang out on the back patio quite a lot and when we invite guests over, even after we ask them to just come on in, they ring the doorbell and we can’t hear it out on the back patio. The leave disappointed that we would not be home when we said we would be. I’m kidding. Usually they do walk right in.
I threw together a video of the warp core’s control circuit and eight stupidly bright white SMD LED strips for the rings. The original rings were going to be through-hole bright LEDs, but I realized how much soldering and drilling would be required for that. That is dumb and painful. So, factory-built strips of LEDs, complete with self-adhesive backing, resistors, and snap-on wire ends ready for 12-volt DC power it is!
Here it is in action:
There will be more to come as we start to construct the body of the warp core.
Some of you regulars may have noticed that comments were magically not appearing at the bottom of some of the posts on this blog. I snooped around in the code behind the theme and discovered one line of PHP that caused comments to sometimes show and sometimes not show. I’d like to share what I found to help others who are having the same problem.
Let me add this little tidbit: I LOVE this Notepad theme by Nick La (http://ndesign-studio.com/wp-themes). His work is Very excellent. I contact Nick through his contact form to let him know about the one-line fix to the comments.php file in his theme. I had installed this theme when my blog was running as WordPress 2-something, not 3.
Here is the easy fix: Edit your comments.php file and find this line (roughly line 24):
Yikes, that title was a mouthful, but I wanted to make sure the search robots gobbled it up with their mouths so that people in my situation would find this article.
Short attention span version: I can’t seem to get Mac OS X Lion to connect to my FreeNAS iSCSI drives. Lemme essplain what I have and what I am trying to do. In a later update or another article, I will explain how I (hopefully) eventually got this working.
Medium attention span version: This whole exercise was due to my Promise Technologies NS4300N chassis failing to function with Lion. I first noticed it when, after I had upgraded to Lion, my iTunes was pitching a fit about not being able to connect to my music library. Meh. After some research, I found that 1) Promise end-of-lifed the NS4300N; 2) Lion broke the Apple File Sharing (AFS) feature of the device. I’d like to kick someone square in the _ _ _ _ _ for this, but I figgered there was a solution somewhere to solve my storage dilema.
UPDATE: (Slightly more than medium attention span): I used globalSAN from Studio Network Solutions to get Lion going as an initiator for iSCSI. I was able to get the globalSAN thingy to connect and seeminly stay connected to the FreeNAS drives, but once I tried to partition the disks, DiskUtility hung up solidly. I was never able to unmount or do anything to the drives at all. So, apparently, we’re still waiting on an update to globalSAN. I have confirmed that nothing is available as of August 2 by reading the forums at SNS. They have acknowledged the issue, but hav not yet updated the product. It is FREE, so I’ll be patient.
There’s a simple and fully Open Source solution for network attached storage (NAS) that I was not aware of until our genius IT guy (“Drew”) opened my eyes this week. You see, I used to be a network engineer and I’ve lost touch with the latest neatnessisms of the industry. Whether you’re a Mac dweeb, Windows dork, or Linux chowderhead, you can build an inexpensive NAS box yourself for not much coin, especially if you have extry parts and computers lying around. Instead of going out and purchasing a $500 NAS chassis like I did a year or two ago, you can take that leftover 2.4 GHz Dell sitting under your desk and make it a useful device again. My Dell used to be a fairly cutting-edge video editing system, but as of late it has turned into an under-the-desk Dust Bunny Collection Unit (DBCU).
I LOVE my iPad 2. To protect it, I HIGHLY recommend the DODOcase (http://www.dodocase.com/products/dodocase-for-ipad2). My only complaint would be the lack of a magnet in the case to activate/deactivate the iPad through its little magnetic sensor, which is used by other cases, like the foldy-flippy one from Apple (http://www.apple.com/ipad/smart-cover/).
What to do? Hack, of course! But, first, I emailed the DODOcase peeps and suggested the feature to them and even sent them links to my source of delicious rare earth magnets, K & J Magnetics (http://www.kjmagnetics.com/). There are thin little rectangular magnets that can easily be embedded into the cardboard cover underneath the backing.
For now, my magnet sits on top of the inside cover:
Well, we’ve moved into a new and larger space at the office and we sit at these massive wood and steel desks as teams. Our team decided we needed more “flare” at our desk, so, of course, a big-ass warp core was the first thing that popped into our heads. How hard could that be?
The rings of the warp core will be clear-ish fiberglass. The original master, over which we’ll make a fiberglass mold for all eight rings, is made of a giant laminated wood block we need to turn on a big lathe.
Laminating 2x6 pieces of pine for the ring master mold
The Short Attention Span version: I ripped apart a cheap remote controlled car and repurposed most of the parts into a self-balancing robot based on the Domo character because I thought one of the partners of the company I work for would enjoy it, as he seems to enjoy Domo stuff. I got the idea from a coworker who suggested I build this for the Domo partner.
The idea is not original to me. I was sent a link to Instructables.com that showed one in action. I didn’t follow the directions, so the engineering is my own brew. But, I will say, that’s an ingenius way to make an upright, two-wheeled roboto-doo-dad.
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