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Hardware Hacking

Submission + - Homemade Robotic Xylophone Plays Holiday Melodies

compumike writes: Just in time to add a bit of geeky holiday cheer to your office, this video demonstrates how to build a robotic xylophone featuring handmade solenoids and aluminum bars, and shows it playing several classic holiday tunes. New songs can be programmed in with C macros, and this project could even be extended to perhaps play a melody when a new e-mail arrived or a software build has finished compiling!
Iphone

Submission + - Gentlemen Prefer Androids, Ladies iOS

Ponca City writes: "PC World reports that women are more likely to buy an iPhone for their next smartphone purchase, while men prefer Android devices. According to data collected in October 2010, 31 percent of women wanted to buy an Apple iOS device next, followed by 22.8 percent interested in a Google Android device while among men preferences were reversed with 32.6 percent of men interested in an Android purchase and 28.6 desired an iOS phone. "So where is the extra appeal of Android to men coming from?" writes Tracey E. Schelmetic . "More male-targeted commercials that emphasize cool gadgetry versus usability? More techno-macho phone brand names like “Droid”? Extra advertising on the Spike channel by phone makers using the Android platform?" When preferences were broken down by age group, Apple iOS was the most desired choice in every age range apart from one: 35-54 years olds. In this age group, more people preferred upgrading to an Android phone (27.4 percent) than an iOS device (26.3 percent)."

Comment Re:Duck Duck Go (Score 2, Insightful) 281

I too have been trying Duck Duck Go (link to encrypted version) for the last several weeks and have been impressed.

Furthermore, check out their privacy policy, as well as a recent blog post about search privacy that explains why it "might be the most private place to search the Internet". No IPs logged, no cookies, no contractors.

There are also a large set of convenient "bang commands" such as searching "!slashdot foo".

And finally, searching over (encrypted) HTTPS just works "out of the box".

Give it a try for a few weeks!

Comment Free electronics video tutorials from NerdKits! (Score 1) 301

Check out some of the NerdKits Video Tutorials, which are 20+ free video tutorials that cover all sorts of electronics topics. For example, Motors and Microcontrollers 101 talks about how to model motors as circuit elements (I'm the guy in this video). The Halloween Capacitive Touch Sensor talks about using aluminum foil as a proximity sensor. All in all, we sell breadboard-based electronics kits, which help beginners like yourself get started with electronics and programming.

Then, our customers adapt it to do things we'd never dreamed of: measuring how far a hamster runs at night, or controlling an RC helicopter, or building an intervalometer, or even building a video game system.

The communications / RF type stuff is very cool, and I hope you're able to get there! The most relevant content we have available right now is a 20-minute video about building a single transistor amplifier for a sound meter.

Best of luck in your electronics journey!

Submission + - PayPal E-Commerce Hack: More Friends = Lower Price

compumike writes: PayPal's ongoing X Developer Challenge and their new Adaptive Payments APIs have allowed coders to dream up new ways of thinking about online payments. One of these entries is called Buckits, which lets consumers pool together to get discounts on a microcontroller kit. Check it out, and vote for your favorite entry in the PayPal Developer Challenge — voting ends Friday 11:59PM PST. Whether or not you're interested in microcontrollers, this demonstrates how PayPal is partnering with developers to create the future of e-commerce.

Submission + - New E-Commerce Model: Self-Serve Group Discounts

compumike writes: A "Buckit" takes the simple idea of a group discount and augments it for the modern Web. Anyone can create a Buckit, or join one that already exists. The more people who sign up for a Buckit, the less everyone pays for his or her own item. The final price each Buckit member pays for their itemis based on the number of people in the Buckit, and the amount keeps going down as more people join. This model lets people take advantage of their social networks (online and offline) to spread the word about a cool product and save money at the same time.

NerdKits is launching this today and applying this to the educational electronics kits they've sold online since 2007, but are also interested in applying the concept to other e-commerce areas where there's a "social or network utility" to a product: event tickets, multiplayer video games, etc. Check out this brief demo video, launch details, or the live Buckits website.

Comment Re:The "Arduno" cult (Score 3, Informative) 77

(Actually, not 32-bit -- it's all still 8-bit, except for the AVR32 line which is another set of chips altogether.)

You're right, there was a lot lacking and people could be "scared away" from getting started with microcontrollers, but what we're trying to do with NerdKits is make it less scary without hiding the complexity or the conceptual learning. Our hypothesis is that people are actually smart enough to handle real tools, if you show them how, and will be far better off with that experience. Guide newbies through looking at the datasheet, setting registers, etc. Add some unique content that really makes you use your brain, and we've got a lot of very happy customers!

Comment Re:Do they still make those "electronic project ki (Score 1) 368

I too had one of those as a kid -- the ones where you follow the book to connect the various spring terminals! While I might be able to go back and learn some more from it now, I can't really say I learned much from it at the time. It was very much focused on just following the step-by-step directions, with little emphasis on creativity / customization / concepts. So after finishing my Masters in EECS from MIT, I decided to build my own electronics kits for the "digital generation", with a tremendous focus on creativity / customization / concepts. Check us out :-)

Comment Help them get started with electronics+programming (Score 5, Informative) 368

Whatever you do, find something where there's real teaching and interactivity and creative thinking going on -- not just polishing some rocks or a step-by-step Lego project. And furthermore, interacting with your child while they're using whatever science gift you pick is also extremely valuable.

Ages 7 and 9 may be a bit young... but we know that 11-year olds do well with getting introduced to electronics and programming, and the interaction that it offers with the physical world through various sensors and actuators. In our experience at NerdKits electronics kits, our youngest customers tend to learn the fastest, because they are the most fearless! They're able to try building something, get something wrong, but just keep working at it until they succeed. Our various free video tutorials help teach various electronics and programming concepts as well.

Here's an 11-year-old's NerdKits "Kid Review" in Make Magazine, or a reading by the author of the review.

Challenge them a bit -- with a bit of guidance, they're capable of taking on more than you might think!

Hardware Hacking

Submission + - Google Voice Controls Giant LED Display (thedavisblog.com)

compumike writes: "What geek among us has never sat and thought about how cool it would be if you could call your computer and have it do stuff? Josh Davis put together a quick video demo and source code of his Voice Controlled LED Marquee, powered by Google Voice speech recognition and a DIY LED Array Kit. Imagine using the same display for monitoring server uptime, or RSS feeds!"
Hardware Hacking

Submission + - Programming a "Haunted" Halloween Jack-o-Lantern

An anonymous reader writes: NerdKits has just released a neat "haunted" Jack-O-Lantern video tutorial that glows when you reach your hand inside! The technology used for the sensor is the same as is used in laptop trackpads and smartphone touch screens but can be built with common materials: two pieces of aluminum foil, some paperclips, and a processor running C code at 14MHz. The sensor trips when a hand is nearby, and LEDs light up to surprise and scare the unsuspecting trick-or-treater. Download the source code and extend this idea for your home or office!
Hardware Hacking

Submission + - DIY Capacitive Touchscreen Tech for Halloween

compumike writes: For this special Halloween project, NerdKits has put together a "haunted" Jack-O-Lantern (video and construction details inside) that glows when you reach your hand in. The technology used for the sensor is the same as is used in laptop trackpads and smartphone touch screens, just implemented with a somewhat more MacGyverish twist: two pieces of aluminum foil, some paperclips, and a microcontroller running C code at 14MHz. The sensor trips when a hand is near, and LEDs light up to surprise and scare the unsuspecting trick-or-treater!

Comment Impress, analyze, and then synthesize (Score 1) 256

You've got to get their attention first -- impress them with something that makes them say, "Wow, that's cool!" This is particularly important when reaching out to high schoolers and others who aren't necessarily techies yet. While some "neat" algorithm or circuit may capture your attention or mine, it's really hard to visualize for people who aren't already in that mindset, so you generally need a good physical interaction to capture their attention and spark their interest in the first place. From our NerdKits DIY video tutorials collection, I can particularly suggest USB-Guided Servo Squirter (a water gun you can point and control with a computer), our iPhone-controlled R/C car, our Valentine's Day LED Heart with PRNG for a randomized twinkling effect, or even our Morse Code Decoder which automatically translates dits and dahs into letters.

Then, only once you have their attention and interest (they've got to be asking, "How'd you do that?"), you can go deeper into the underlying concepts and electronics and programming. Open up a dialogue, ask "How would you build this (conceptually)?", and once you've done that kind of analysis-style thinking on a few existing projects (learning to take things apart), the students will be empowered with the skills they need to start doing synthesis-style thinking on building projects of their own.

Only after that should kind of top-down, system-level thinking should you dive down into the details, like how to use printf and scanf in C for the LCD or serial port, or how to use interrupts in microcontroller programming.

Just yesterday I taught four high school physics class sections, 10th-12th grades, and we were able to talk about concepts around feedback control systems, sensors and noise, motors, etc all around a currently-unreleased project we're working on with our electronics kit. (Lots of links here, but I think they're quite relevant to my reply and show off how we do things in our part of the DIY educational space.)

So in summary, capture their attention with a few exciting projects, make them think analytically to figure out how they work, and from there, let their imaginations run with taking those projects in new directions or in coming up with their own!

Comment Making Science and *Engineering* Relevant (Score 3, Insightful) 899

If you're truly trying to integrate science with "mainstream culture", a big part of the overlap is in engineering. Science for the sake of scientific knowledge is great, but we've found that it's often easier to connect to people by looking at how science connects with their lives, which often falls into the realm of engineering (or medicine). We have tried to do that with our free educational electronics videos.

Even as science and medicine and gadgetry continue to advance, it's important to make it accessible and exciting to those outside the field. But while the original book being reviewed argues that "the scientists themslves" must take up the lead in educating the public, the fact is that making these subjects accessible has its own set of required skills that are not necessarily the same as those needed for being an excellent scientist. Some will be able to do both, but it's not for everyone.

Hardware Hacking

Submission + - Source Code and Signal Processing at your BBQ?

compumike writes: With July 4th cook-outs right around the corner, this new digital meat thermometer hack demonstrates an interesting application of digital signal processing techniques to something everyone does every day: food preparation. In order to speed up the meat temperature measurement, this video tutorial shows how to use a few lines of C code to invert the slow rise of the sensor and get a much faster overall device. Can code overcome the constraints of the physical world? Is the world ready for high tech in the kitchen?

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