[Bissinblob] has about 70 of these WYSE 3125SE thin clients and is offering them up at $15 a piece plus shipping. That’s quite a steal!
The specs are as follows:
Be sure to let us know what you’re doing with them if you happen to get one. If you have something lying around that needs to go, feel free to post it on our classifieds.
This isn’t a hack. But it is a decidedly interesting piece of mechanical technology. The Whiffletree shown above is a way to turn binary data into a mechanical analog value. [Bill Hammack] explains how this assembly is used in a typewriter and how a whiffletree can convert binary data to a set of analog outputs.
These linkages are what makes an IBM Selectrix Typewriter work. You know, the one with the globe stylus instead of individual hammers for each key? [Bill] uses the typewriter as the example in his illustrations that show how each bit of data positions the output in a predictably different location. We’re familiar with other mechanical representations of binary data but converting to an analog value mechanically is a new concept for us. Lukily, the videos that [Bill] put together are fantastic at explaining the concepts. Not surprising, since he is a professor at the University of Illinois at Urbana-Champaign . See them both after the break.
Continue reading “Wiffletree: A Mechanical Digital To Analog Converter”
I went to the last monthly meeting of Sector 67, a hackerspace in Madison, WI. One of the things shown off was a color changing LED light bulb that Menards was clearing out for $1.99. Inside there’s two RGB LEDs controlled by an ATtiny13 and powered by an AC/DC buck converter. An ATtiny13 will run you around $1.25 by itself so this price is quite amazing. I grabbed a couple of these bulbs and set to work on them. Join me after the break to see what I’ve got so far.
Update: read a follow-up to this post.
Continue reading “Help Me Reverse Engineer An LED Light Bulb”
If you’ve ever designed an embedded system with at least one button you’ve had to deal with button debouncing. This is also know as contact bounce, a phenomenon where a button press can be registered as multiple button presses if not handled correctly. One way to take care of this is with a hardware filter built from a resistor-capacitor setup, or by using a couple of NAND gates. We find that [Jack Ganssle] put together the most comprehensive and approachable look at contact bounce which you should read through if you want to learn more.
We’re interested in software solutions for debouncing buttons. This seems to be one of the most common forum questions but it can be hard to find answers in the form of reliable code examples. Do you have debounce code that you depend on in every application? Are you willing to share it with the world? We’d like to gather as many examples as possible and publish them in one-post-to-rule-them-all.
Here’s some guidelines to follow:
As an example we’ve included one of our favorite sets of debounce code after the break. Please note how it follows the guidelines listed above.
When you see $125 off something you probably assume it cost several times that to start with. Nope, this drastic discount leaves just $25 plus shipping. Use coupon-code: 2JLP-R4XRT3 when ordering the little rover. There’s a quick video snippet of it embedded after the break.
What you’ll get is a Stellaris ARM Cortex-M3 microcontroller on a board with a bunch of goodies.
As always, we want to hear about the hacks you come up with once you have this little guy in hand.
[update, the code is now expired]
[final update — Someone from TI explains what is going on.]
—- from the comments.
As some posts already note, the coupon code is only available to ESC Boston attendees. That said, we’re psyched about all of your interest and understand there seems to have been some confusion, so TI plans to fulfill all of the finalized orders to date. We’re working on some logistics in getting the code up and running again for ESC Boston attendees, but proof of ESC registration will be required. Stay tuned.
We hear you about the e-store and are working as quickly as possible to avoid issues in the future. Thanks for your patience.
Bottom line – we’re glad to see the excitement around EVALBOT and look forward to checking out your projects! We encourage you to share them on our e2e Forums at http://e2e.ti.com/
-Jean Anne Booth, Texas Instruments
——-
You’ve probably already heard about the Apple TV 2. It retails for $99 and packs a punch with HD video, optical audio, and WiFi in that tiny package. But as always, we like it for its hackability. Even though it’s just starting to ship, the hacks are already rolling in. The firmware is available from Apple’s servers and has already been unlocked with the yet-to-be-release SHAtter exploit. [Das_coach] even sent us a link to a video of the new Frontrow ported for the iPod touch (embedded after the break).
But the holy grail has to be XBMC. We’ve seen it on the first generation Apple TV and it was good. The second generation switches to the A4 processor which is an ARM Cortex-A8. Not quite as easy to port for as the Intel chip on the first generation was. But there is hope, one of the 2010 Google Summer of Code projects worked to port XBMC to another ARM device, it’s just a matter of inspiring some developers to take on the quest to make it happen. We can’t wait for the day that we can just velcro one of these to the back of our TV and be done with it, that first generation Xbox isn’t going to last forever.
[Fileark] has instructions for reprogramming keyless entry devices for your car. His demonstration video, which you can see after the break, shows how to make one key fob work for two different vehicles. In this case he’s working on a couple of Chevrolet trucks but there are instructions for GM, Ford, Dodge, Toyota, and Nissan. If you need to reprogram one of these you may find this useful, but we’re wondering how it can be incorporated into a project. If you can sniff out the communications that are going on during the programming you should be able to build and pair your own devices with a vehicle. Wouldn’t it be nice to incorporate your keyless entry into your wristwatch?
