I wanted to build a new desk for my room that looked nice but was substantial and sturdy feeling. After making tons of furniture with iron pipe fittings I decided to try something new. The legs are a mix of minimal modern designs and saw horses. The more modern legs seemed too thin for such a big slab, and I feel the saw horse legs give an unassuming feeling of utility.
I made a piece of functional art with the LightBlue Bean! It uses python to pull the report, and the LightBlue Bean (essentially a BLE Arduino) to receive the data over bluetooth low energy and set the LEDs.
The general conditions are indicated by the color of the LED (blue is poor, green is fair, orange is good, red is epic), and the size by the intensity of the LEDs.
It’s cool living blocks from the ocean, except for all that salty air rusting away anything in its path.
I replaced my front forks on my Kawasaki Ninja 500R about 10 months ago, and they were pitting again. I read a bunch of info on forums on how people are solving this, and decided to give it a shot myself. I’m not going to cover the standard steps to remove the front forks, as there are plenty of other places to find that. Clymers manuals will work, or this place: http://www.cyclepedia.com/
Before you get started you’re going to need a 12mm Allen Wrench. No problem, right? Just head down to the local hardware store. Wrong. Okay, maybe the auto parts store. Also wrong. None of those bastards had it, so order it in advance from McMaster (71285A196), or call ahead of time.
First I sanded down the pitted spots using 800 grit sandpaper (McMaster PN: 4611A315). Then a bit with 1200 grit (McMaster PN: 4611A313).
I wiped it down a bit with a towel and decided to try my luck with some metal epoxy. This stuff is epoxy, but with metal in it. In my case, aluminum. Not sure on which is best, but mine was certainly the cheapest. It also sets up in 7 minutes and is fully machinable / sandable in 2 hours. Pick some up here: 7500A4.
Spread the two part epoxy on something and then dab it on the pitted spots. Then I used a piece of cardboard to smooth it over and remove the excess. I should have removed more excess as you can see in this picture:
After a couple hours, get ready to sand. I used some 600 grit to move it a bit faster (McMaster PN: 4611A314).
Finally, I coated it with an anti-rust coating that you can pick up here: 1370K34. It’s fairly cheap and seems to leave a waxy finish protecting it from rust.
That’s it! I’ll update you in 6 months how this has held up. Happy riding.
The iPhone was clearly not built specifically for gaming. Not having tactile buttons that you can feel is a major problem for any serious gamer. In addition, making mistakes in games in infinitely more frustrating, than say, writing an email. In an email you can just backspace and fix it, whereas in a game you are penalized much more.
Thumbies solve this problem by sticking onto your screen, and providing a tactile D-Pad and buttons. It feels just like a game controller, and it works out of the box. Since it interacts through the screen, it is incredibly easy for developers to support.
I started working on this concept over a year and a half ago. I first built a playstation to iPhone adapter, and had that 90% complete when this idea struck me. I figured, the user’s thumbs are already taking up space on the screen, why can’t you just put a button pad ontop of the screen? Within 30 minutes I had my first prototype, loaded up Mario, and I knew I was onto something.
It’s a very simple concept, which results in interesting responses from people. I got quite a lot of people scoffing at the idea “Why would you put buttons on a TOUCH screen?”. But those who took time to think it through, saw the advantages:
It’s a simple product, making the development cycle short.
Since there are no electronics, the cost is fairly low, making a $14.99 price point possible.
Developers don’t need to write additional code to support it; don’t have to depend on developers for it to be adopted.
The market for iPhone, iTouch, and iPad gaming is HUGE.
The most common complaint about iPhone games is the lack of tactile feedback. The market is clamoring for a solution.
We are contacting more developers, who so far are thrilled. It will be interesting to see how it is adopted over time.
“There are 2 ways to learn antenna design. One way is to go to grad school. I’ll teach you the other way”
-A mentor of mine
Engineers love to refer to wireless as ‘black magic’. Which is partly true. But with the right tools and the willingness to fuck it all up (a few times), you’ll be making your mark on the 2.4GHz band in no time. This guide is a ‘Trial and Error’ approach to antenna design. It won’t be perfect, and won’t cover a lot of the ‘hard’ topics. You probably won’t even feel smart after reading it. You may even feel a little dirty. But you WILL be able to design an antenna to ‘good enough’ standards, for 2.4GHz communication (wifi, zigbee, ANT+, etc).
I had the Punch Through Design website re-done, and I’m loving the clean new look. I was referred to the designer, Norm Orstad of Orstad Design, by a mutual friend, and I’m very happy with the results. Now I need to work on publishing the other projects we’ve completed!
I’m happy to see a couple Punch Through Design clients getting press. Both Pedal Brain and Shepherd are mentioned in the article:
The iPhone and the iPod Touch, it’s a pretty cheap platform and it has a lot of power behind it,” said Colin Karpfinger, owner of hardware and software developerPunch Through Design. “It’s a really nice building block to do other things with.”
I moved cross country from Minneapolis to San Francisco in February 2010. I arrived to an empty room with 3 bags, and a debit card that Wells Fargo thought was stolen. A few days later UPS delivered the rest of my life, mostly intact. Learn from my mistakes:
Throw it away
Anything you haven’t used since you last moved. Remember that you’re paying shipping for each pound. This helped me toss the extra crap.
Number your boxes
I labeled each box with a number then made a google doc of the contents. Then when you’re looking for one specific thing you don’t have to tear through all your boxes.
I had one box that had those huge metal staples on the bottom, and it was one staple away from tearing open when it arrived. This was holding my main computer and one LCD monitor! I got lucky. Tape every single edge of your box.
Greyhound Freight for Heavy, Unbreakable Stuff
Greyhound offers a super cheap, super slow shipping service. If you’re moving to a city, there is a good chance you have a greyhound station close by. Ship your heavy non-fragile items on the bus.
Carry Your Hard Drives If you have a desktop computer, take out the hard drives and pack them with you. Everything worked when I arrived.
Move in with Randoms
I moved in with 3 other people, none of whom knew each other beforehand. I’ve had some friends who’ve moved in with people who already lived together for awhile, and they became ‘the new guy’. If you’re all new, you’ll be more willing to go out, meet people, see the city, and get to know each other.
Tell your Bank!
Wells Fargo decided some bum stole my debit card and headed west. Turns out that bum was me, trying to buy groceries.
Clean Up, Take Pictures, Sublease
Right before you move out, do your best to clean your room and take some pictures. I got about a 5x higher response rate on craigslist with pictures in my listing.
It’s Not Hard Once you do it once, you’ll get rid of your crap and keep only the essentials. At that point you could sell your furniture on craigslist and be moved out within a week.
Like the best of projects, this started with a question- “I wonder if it’s possible…”.
It turns out the answer is YES!, but not without a lot of hard work. This project alone was my crash course in C++, Linux, Computer Vision, Servo Control, and designing circuit boards. I can’t think of a more exciting way to learn. Although I can think of a few less painful ways.
What is it?
The Mercenary is a robot that can ‘see’ the world through a single camera, and can interact with the world by aiming and firing its paintball gun. Basically, the goal is to replicate the behavior of a person guarding an area, with a robotic system.