Using An IR Remote With Your Arduino

If you’ve ever needed a short-range remote control for a project, [firestorm] is here to help you out. He put up a great tutorial on using an IR remote to do just about anything with everyone’s favorite microcontroller platform.

[firestorm] used the Arduino IRremote library to decode the button presses on his remote. After uploading the IR receive demo included in the library, the Arduino spit out hex codes of what the IR receiver was seeing. [firestorm] wrote these down, and was able to program his Arduino to respond to each individual button press.

After figuring out the IR codes for his remote, [firestorm] threw a shift register into his bread board and attached a seven-segment LED. Since [firestorm] knows the codes for the number buttons on his remote, it’s very easy to have the LED display flash a number when the corresponding button on the remote is pressed.

A single seven-segment display might not be extremely useful, but with [firestorm]’s tutorial, it’s easy to give your Arduino some remote control capabilities with a simple IR receiver. Not bad for a few dollars in parts.

Retrotechtacular: Recovering Lost Moon Images By Dumpster Diving

In 1966 and 67, NASA launched five probes to image the surface of the moon from orbit, eventually returning over two thousand high-resolution images of future Apollo landing sites and selenogical features to researchers on Earth. After taking its pictures of the moon, developing the film in orbit, and scanning the print with an electron gun and photomultiplier tube, the images were sent to Earth stations and recorded onto magnetic tape with a hugely expensive tape recorder, a state-of-the-art storage system costing $300,000. Researchers poured over these images of another world, made a few 35mm prints and sent the magnetic tapes off to the NASA archives.

Under the care of [Nancy Evans], the tapes sat in a warehouse eventually moving to an abandoned McDonalds at Ames Research Center. In 2005, retired and not bound by NASA, [Nancy] made a plea to preserve this milestone of human spaceflight wasting away under the golden arches which was heard by [Dennis Wingo]. [Wingo] and admin of the NASA Watch website admin [Keith Cowling] drove out to [Nancy]’s house with a truck, picked up the Ampex FR-900 tape drives she had saved in her garage from the trash heap at Eglin Air Force Base and headed to the cache of Lunar Orbiter tapes at Ames.

None of these drives worked, of course. Forty years will do a lot to expensive precision equipment. Luckily, one of the employees at Ames tasked with fixing video equipment had worked on the ancient Ampex drives before. Taking the unbroken parts of these machines and turning them into a single working unit didn’t come easily; again, parts needed to be scavenged from the Ames boneyard.

All this work was worth it for [Cowling], [Wingo], and [Evans] when the first image – an Earthrise picture seen above (sans the obvious Photoshoppery) – appeared on their monitor. Later, an amazing oblique shot of Copernicus crater was recovered.

In the years since these first images from the LOIRP project were released, many more images have been made available. These images are actually comparable to the Lunar Reconnaissance Orbiter, launched in 2012. Not bad for 45-year-old hardware that has since crashed into the moon.

As for what the future holds for the still-magnetized images from the Lunar Orbiter program, [Dennis Wingo] says they’re considering putting up a Kickstarter to close the gap between the necessary funding and what NASA provides. We’ll be sure to post a link when that happens.

via boingboing

Vibrating Gloves Help Bring Back Finger Sensation After Injury

This glove is something of a medical breakthrough. It’s used in conjunction with a musical keyboard to teach the wearer how to play simple songs. The thing is, instrumental proficiency isn’t the end goal. This is aimed at returning sensation to patients who have had a spinal cord injury. Many of the test subjects — all of which had the injuries more than a year before participating — experienced increased sensation in their hands and that is quite rare under these circumstances.

There’s not a ton of information available on the hardware itself, but this image lets us make a  pretty good guess. The glove is a typical fingerless cycling glove. There are two conductors worth of ribbon cable going to each digit. On the ring finger you can make out the bulging hardware which appears to be a vibrating cellphone motor. The white enclosure houses the microcontroller which receives wireless commands from a PC. When it is time for a finger to move, the appropriate motor vibrates. This is best explained in the clip after the break.

Apparently the combination of sensory feedback and the need to react to it provides the therapeutic impetus which achieves the promising results seen in the study.

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Power Pwn’s Price Tag Is As Dangerous As It’s Black-hat Uses

This rather normal-looking power strip hides a secret inside. It’s called the Power Pwn, and it conceals hardware which facilitates remote penetration testing of a network. It really is the ultimate in drop hardware as you can quickly swap it with existing power strip. Who’s going to question it?

It’s got almost all the bells and whistles. There’s dual Ethernet ports, Bluetooth with 1000′ range, and WiFi with a high gain antenna. The SoC inside comes with Debian 6 and all the exploit tools you might want pre-loaded. There’s even a 3G adapter, but it’s external and not pictured above. The thing is, for a pre-order price-tag of  $1,295 we think that 3G should have been internalized and come with a lifetime unlimited data plan! That could be a bit overboard… our heads are still spinning from the sticker shock.

This isn’t the first time we’ve seen hardware from this company. Their Pwn Plug was used in this project. We just didn’t catch the $595 price tag for that device until now.

[via Reddit via Zdnet]

Driving Your Home Appliances With Hybrid Power

This system of hybridizing your home’s electric appliances is an interesting take on solar energy. It focuses on seamlessly switching appliances from the grid to stored solar energy as frequently as possible. There’s a promo video after the break that explains the setup, but here’s the gist of it.

Follow along on the pictograph above. We start on the left with solar panel. This feeds to a charger that tops off a 12V battery. When that battery is full, the charger feeds to the inverter which converts the 12V DC to 110V AC power. This is fed to a pass-through which is in between the appliance (in this a case a lamp) and the wall outlet. The pass-through will switch between mains power coming from the outlet, and the 110 coming from the inverter. The homeowner won’t know, or care, which power source is being used. But sunny months should result in lower energy bills. The real question is how long it takes to cover the cost of the system in saved electricity.

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Measuring How Components React To Extremely Cold Temperatures

[Shahriar Shahramian] is playing with some liquid nitrogen in order to see how various components react to extremely low temperatures. After the break you will find forty-one minutes of video in which he conducts and explains each experiment. This does have practical applications. If you’re designing hardware for use in space you definitely need to know how the hardware will be affected. We’ve actually seen test rigs built for this very purpose.

During the presentation he doesn’t water down the concepts observed, including the equations governing each reaction to temperature change. If you’re in the mood for a little bit lighter faire you should check out some of the liquid nitrogen cooking hacks like this super-cold cocktail pops project.

 

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Task Scheduler For Arduino

For their recent high altitude balloon project LVL1 member [Brad] programmed a pretty complicated brain based on an Arduino. It was responsible for collecting data from all of the sensors, and reporting back in a few different ways. One of the things he did to simplify the project was develop a task scheduler for the Arduino board. It lets you add functions to a queue of jobs, along with data about when they should be run.

The task scheduler does make coding a bit easier, but where it really shines is in situations like this where you don’t have access to the hardware if there’s a problem. In his description of the scheduler [Brad] mentions the possibility that one of the sensors could fail as the cold of the upper atmosphere takes its toll. This could leave the whole system stuck in a subroutine, and therefore it will stop sending reports back to the team on the ground. Since he was using the task scheduler it was a snap to add watchdog timer servicing to the mix. Now if program execution gets stuck the watchdog will reset the chip and all is not lost.

[Thanks  JAC_101]