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Axis Glove That Controls a Robot

Hackaday - 7 hours 3 minก่อน

This homemade glove and gesture controlled rover was created by [electro18]. It can send temperature, battery level, and object distance to the LCD panel on the wrist. Instead of a typical joystick, this wireless system taps into an embedded accelerometer to maneuver the robot like magic.

The main chassis platform is made of clear acrylic and has additional acrylic strips fixed to the edges for additional strength. A LM35 temperature sensor is wired to the front that monitors the environments that the rover explores. An HC-SR04 Ultrasonic Rangefinder acts as the eyes of the machine. The photodiode is covered with an adaptation of a 6mm heat shrink tube to avoid false readings. Once hooked up and turned on, the robot can be controlled with the futuristic power glove consisting of two parts. An accelerometer strap and a display strap are the biggest parts. The project shows that it is relatively easy to make a system like this. Other items like quadcopters and tiny water boats could be controlled with a similar type of setup.

A video of the axis glove maneuvering the vehicle on a slope can be seen after the break:


Filed under: drone hacks

A Hackable Hi-Fi Audio DSP

Hackaday - 10 hours 3 minก่อน

 

Audiophiles tend to put analog systems on a pedestal. Analog systems can provide great audio performance, but they tend to be quite costly. They’re also hard to tinker with, since modifying parameters involves replacing components. To address this, [tshen2] designed the DSP 01.

The DSP 01 is based around the Analog Devices ADAU1701. This DSP chip includes two ADCs for audio input, and four DACs for audio output. These can be controlled by the built in DSP processor core, which has I/O for switches, buttons, and knobs.

[tshen2]‘s main goal with the DSP 01 was to implement an audio crossover. This device takes an input audio signal and splits it up based on frequency so that subwoofers get the low frequency components and tweeters get the higher frequency components. This is critical for good audio performance since drivers can only perform well in a certain part of the audio spectrum.

Analog Devices provides SigmaStudio, a free tool that lets you program the DSP using a drag-and-drop interface. By dropping a few components in and programming to EEPROM, the DSP can be easily reconfigured for a variety of applications.


Filed under: digital audio hacks

Node-RED hacking – audio library front-end

dangerous prototype - 12 hours 34 minก่อน

Paul over at Dorkbotpdx writes:

When I started the Audio library, a nice GUI (like Puredata or Max/MSP) seemed an impossibly distant dream. Then, in this forum thread, I learned of the open source Node-RED project.
Over the last few days I’ve been coming up to speed on modern Javascript tools like jQuery and D3, to hack Node-RED into a GUI front-end. Much work still needs to be done before this is usable, but I’m pretty excited about the possibilities!

Hackerspace Tour: Syn Shop, Las Vegas

Hackaday - 13 hours 3 minก่อน

While we were at DEFCON, we had the chance to visit a few places in the area that are of interest to the Hackaday readership. We made it over to Syn Shop, the Las Vegas hackerspace.

Years ago, this area of town was home to the Greyhound bus depot, complete with all the adventures associated with that. Since then, Zappos set up their HQ nearby, massive amounts of money flowed in, and gentrification got a big thumbs up from the decaying casinos in the area. Syn Shop is just down the street from the Denny’s with a bar and the twelve story tall slot machine with a zip line, making this space perfect for the community outreach that is lacking in so many other hackerspaces. In the hour or so I was there, no fewer than two groups of people took a gander through the plate glass asking themselves if this was ‘one of those makerspaces or something’. It’s a far cry from hackerspaces found tucked away in business parks, and something that has worked well for the members of the shop.

[Andrew Bogerri] took me around the space, first showing off the PDP-11/23 which you can drive around with a remote control. Yes, it works. No, not Unix. Yes, the entire stack should weigh about 500 pounds, but the guts of the RL02 drives were replaced with something considerably more modern. Just think of it as a 200 pound remote control car, with the momentum that goes along with that.

Syn Shop has a huge space for classes, and the tutors to go along with it. Classes range from CAM design and CNC operation, to tutorials on how to use the huge ShopBot in the space. There’s also a craft night, plenty of help available for running the laser cutter, and enough electronics paraphernalia to work on anything in the sub-Gigahertz range.

Even though most of the Syn Shop members were away at the Rio getting geared up for the con when I went through, you could still tell the space is constantly buzzing with energy and spurious emissions. I caught up with a few of the other regular members at the Hardware Hacking village at the con, but that’s a subject for another post.

Pics below.


Filed under: Hackerspaces

ST-Link/V2 SWD-JTAG adapter

dangerous prototype - 13 hours 18 minก่อน

alexwhittemore  has posted a detailed tutorial how to make an adapter:  ST-Link/V2 SWD-JTAG adapter 

The fantastic STM32 Discovery boards from ST Micro all come with an embedded ST-Link/V2 debugger onboard, including some jumpers to disconnect it from the target device for use as a standalone SWD debugger. Presumably, this is to allow for easy use debugging a custom end-product PCB, but it’s also useful if you have any other STM32 evaluation boards hanging around with no built-in debugger, but don’t happen to have a proper JTAG dongle handy. Here’s how to make an adapter.
It happens to be the case that I’ve got an STM3210E-Eval board I need to work on, but no compatible JTAG debugger handy. I do have a ton of Discovery boards, so now I just need an adapter to use the Serial Wire Debug capabilities on the STM3210E from my Discovery board.

 

Lilbits (8-20-2014): Intel partners with Unity to court Android game developers

Liliputing - 16 hours 4 minก่อน

While most Android phones, tablets, and other devices are powered by ARM-based processors, there are a growing number of Android devices with Intel inside. After reviewing a few recent tablets with Intel Atom Bay Trail chips, I’m convinced that Intel has largely caught up with ARM in the mobile space: tablets like the Asus MeMO […]

Lilbits (8-20-2014): Intel partners with Unity to court Android game developers is a post from: Liliputing

Biometric Secured Golfcart Allows For Keyless Start

Hackaday - 16 hours 5 minก่อน

Who uses keys these days, really? Introducing the world’s first(?) biometric secured golf cart. Gives “push to start” a whole new meaning!

[Ramicaza] lives in a small community where many families (including his!) use golf carts to commute short distances, like to the grocery store, or school. Tired of sharing a key between his parents and siblings, [Ramicaza] decided to soup up his ride with a fingerprint sensor allowing for key less start.

He’s using an ATtiny85 and a GT511-C1 finger print sensor from SparkFun. After throwing together a circuit on a breadboard and testing the concept he went straight to a PCB prototype for install in the cart. What we really like is the case he integrated into the golf cart’s dash. It features a flip-up lid which turns the circuit on when it is opened, and off when it is closed to save battery. Scan your finger and a relay triggers the ignition allowing you to drive away.

In case your interested in making your own fingerprint controlled something, [Ramicaza] has also shared his source code over on GitHub.

Oh and don’t worry — the original keys still work too. Next up, a fingerprint secured garage door?

 


Filed under: transportation hacks

12 Hours of Hacking

Hackaday - 17 hours 14 minก่อน

If you’re better working under a deadline you should be at your best RIGHT NOW. That timer is counting down the last 12 hours to enter The Hackaday Prize.


Filed under: major tom, The Hackaday Prize

Hands-On: Samsung Galaxy Tab 4 Nook

Liliputing - 17 hours 20 minก่อน

When Samsung and Nook finally unveiled the tablet they were launching together, the only real mystery about the $179 Galaxy Tab 4 Nook was to what extent the Nook software would run the show. I don’t think many people expected to see Samsung hardware and the same Nook version of Android used on older tablets like […]

Hands-On: Samsung Galaxy Tab 4 Nook is a post from: Liliputing

Asus PadFone X mini smartphone/tablet hybrid on the way?

Liliputing - 18 hours 35 minก่อน

Asus offers a line of smartphones that you can use as tablets by sliding them into a tablet docking station. Asus PadFone devices have been available in Taiwan for a few years and this year the Asus PadFone X became the first model to officially launch in the United States when AT&T began offering the 5 […]

Asus PadFone X mini smartphone/tablet hybrid on the way? is a post from: Liliputing

Speedy Drinkmaker Keeps Party Guests Hydrated

Hackaday - 19 hours 4 minก่อน

After five weekends of work, [Alex] completed his automatic drink maker, the RumBot. What makes this automated bartender different from others is the fact that it is fast. VERY fast. It can serve drinks to five different locations in as little as 3 seconds per drink. By [Alex]‘s estimation, this could keep a party of 100 people going without anyone waiting on a drink.

The RumBot can make either of five pre-programmed drinks at varying levels of alcoholic intensity, ranging from 1 (“Virgin”) to 10. And for that extra push over the cliff, you can turn the knob to 11 (“Problem”).

Drink selection itself is handled by a simple digital I/O on an Arduino with a 1950s-styled user interface. The frame is built out of wood and uses 3D Printed plastic parts. It houses a very robust servo on a belt screw-driven stage to move the drink nozzle, and special sensors placed at either of the five drink locations detect a cup ready to be filled. Any cup placed at any of the positions will automatically be filled based on the RumBot’s settings at any particular time.

Based on the quality of the build and the increased speed of this automatic drink maker, this should be a huge hit at any party. With all the knobs turned to 11 though, it might be a good idea to have a breathalyzer on hand! All of the code and schematics for the project are available at the project site as well.


Filed under: Arduino Hacks, cooking hacks

Deals of the Day (8-20-2014)

Liliputing - พุธ, 08/20/2014 - 23:15

The Ace rAspire E11 notebook features a an 11.6 inch display, an Intel Celeron Bay Trail processor, and a relatively low price. It normally sells for $250 and up. But you can pick one up for $70 less than that at Best Buy. While this isn’t exactly the fastest laptop around, it’s a reasonably thin […]

Deals of the Day (8-20-2014) is a post from: Liliputing

Experimenting with DirtypCBs

dangerous prototype - พุธ, 08/20/2014 - 22:34

Here’s Microentropie’s new project a VA meter with boards from DirtyPCBs:

I tried the Dirty Board PCBs service
I chose Express shipping because in my country standard shipping means waiting 1+ months due to ‘standard‘ customs operations.
PCBs are currently travelling.

Service until now has been very quick:
Sunday 10 Aug 2014 9:58: Order received “Yum yum. PCBs. FEED ME! ;)”
Sunday 10 Aug 2014 22:30: At board house “Sent to board house, batch #****”
Thursday 14 Aug 2014 22:37: Shipped “Thanks for making us part of your project!”
Saturday 16 Aug 2014 9:00: Trackable “Order trackable: DHL#**********”
still travelling …

Via the contact form.

Future Google Glass devices might look more like… glasses

Liliputing - พุธ, 08/20/2014 - 22:00

Google Glass is a wearable device that puts a small screen just above one eye and lets you search the web, snap photos, or perform other activities using voice commands. It’s also a pretty conspicuous device that has a tendency to make people think you’re constantly video recording them (whether you are or not). Now […]

Future Google Glass devices might look more like… glasses is a post from: Liliputing

B&N’s Samsung Galaxy Tab 4 NOOK now available for $179

Liliputing - พุธ, 08/20/2014 - 21:12

Barnes & Noble is now selling the first Android tablet with NOOK software that the company didn’t design itself. The Samsung Galaxy Tab 4 NOOK is now available at B&N book stores and on the company’s website for $179 after a $20 rebate and it’s basically what it sounds like… a Samsung Galaxy Tab 4 […]

B&N’s Samsung Galaxy Tab 4 NOOK now available for $179 is a post from: Liliputing

Ask Hackaday: Floating To Space

Hackaday - พุธ, 08/20/2014 - 21:00

On a cool September morning just west of Sturbridge, Massachusetts, a group of MIT students launched a low-budget high altitude project that would go on to gain global attention. They revealed to the world that with a small weather balloon, a hacked camera, cheap GPS phone and a little luck, you could get pictures that rival those from the Space Shuttle. Their project set forth a torrent of hackers, students, kids and parents the world over trying to copy their success. Many succeeded. Others did not.

At 100,000 feet or about 20 miles up, it’s a brisk 60 degrees below zero. The atmosphere at this height is but a fraction of its density at sea level. Solar radiation rains down like a summer squall, and the view is just short of breathtaking. It seems so agonizingly close to space that you could just reach out and touch it. That one could almost float right on up into orbit.

Sound impossible? Think again. A little known volunteer based company operating out of California is trying to do just this.

[JP's] Big Idea

Meet JP Aerospace, America’s other space program, as [John Powell] likes to say. They’ve been doing professional high altitude balloon experiments for years. Their wildly successful “Pong Sat” program has allowed students all over the country to hitch a ride on one of their balloons, which carries their ping pong ball sized experiment to near space.

But we’re not here to talk about near space. We’re going to talk about their ambitious Airship to Orbit program, which uses balloons to reach orbit. That’s right, balloons. It works something like this:

 

Stage 1 – An atmospheric airship flies from the surface to 140,000 feet. It uses buoyancy and aerodynamic lift to get there.

Stage 2 – There is a two mile wide permanent floating space station at that altitude called The Dark Sky Station, or DSS.

Stage 3 – Docked with the DSS is a spaceship called The Ascender. It’s a mile long and constructed at the DSS. It uses buoyancy to get to 200,000 feet. Then it fires its electric engines to slowly reach orbital velocity. Slowly, as in about 9 days slowly.

 

Now, before you think we’ve lost our transistors, know that this is real (pdf warning). They even made a video of the concept! They’ve been researching this idea for decades, and have hundreds of high altitude experiments under their belt. Our job is to discuss two things:

 

A) Practicality. What’s possible and what is not.

B) Scalability. Would the idea work for smaller craft that a couple of hackers can make?

 

 

Stage 1 – The Airship

 

A) Practicality -

The real idea here is changing the shape and material of a basic high altitude balloon to give it some lift and make it steerable. A test vehicle called The Tandem tested some basic propellers at high altitude, which worked. But 140,000 feet? Can you get a high altitude airship that high?

B) Scalability -

Consider a typical 1000 gram high altitude balloon project. Is it possible to take that helium and instead of putting it in a latex balloon, put it into a fixed shape object, such as a Mylar constructed “mini airship” , leaving room for the helium to expand without changing the shape of the craft? Could such an object obtain high altitude? How high? What shape would you use to take advantage of lift? What kind of propulsion would you use, if any?

 

 

Stage 2 – The Dark Sky Station

 

A) Practicality -

Keeping a high altitude balloon at a specific altitude has been done before. NASA has developed what is known as a Super Pressure Balloon, which can stay put in the upper atmosphere for long periods of time. Is there any reason why this could not be done on such a large scale?

B) Scalability -

It would seem feasible to take a typical 1000 gram balloon and equip it with a venting system to keep it at altitude. Google has even toyed with the idea to get internet access to remote locations, and has seen some amazing results. The problem is, the latex and mylar will slowly lose helium, and you will get large swings in altitude between night and day.  How would you keep a small high altitude balloon at a fixed altitude for an extended period of time?

 

 

Stage 3 – The Ascender

 

A) Practicality -

It’s a mile long. How do you keep a mile long balloon craft rigid without it weighing too much? They’ve made headway with generators using model rocket engines. But the thing’s a mile long!

B) Scalability
-

Going back to our Stage 1 mini airship, consider installing a small ion engine on it. Use solar power and a small Van De Graaff generator for power and… could this really be possible? You would need to supply your own inert gas for the engine and some sort of heat shielding would be necessary. The big questions is – could you propel a small, buoyant craft resting at 100,000 feet to orbital velocity over a long period of time using an ion engine?

 

“Ah, but a man’s reach should exceed his grasp, Or what’s a heaven for?”

- [Robert Browning]


Filed under: Ask Hackaday, Hackaday Columns

Omate X is a $129 “companion smartwatch”

Liliputing - พุธ, 08/20/2014 - 20:30

Omate‘s first smartwatch was an Android-powered device that you could use to run apps, make phone calls, or pair with your phone to display notifications. But what makes the Omate Truesmart different from most smartwatches was that it could be a truly stand-alone device. Priced at $299, it’s also more expensive than most smartwatches. Now Omate […]

Omate X is a $129 “companion smartwatch” is a post from: Liliputing

ZTE launches Nubia 5S mini LTE smartphone for $280

Liliputing - พุธ, 08/20/2014 - 19:00

The ZTE Nubia 5S mini LTE is a smartphone with a 4.7 inch display, 4G LTE support, and a 13MP rear camera, a 5MP front-facing camera, and a Qualcomm Snapdragon 400 processor. But it’s not really the specs that make this phone stand out: it’s the price. It sells for just $280 without a contract, which makes […]

ZTE launches Nubia 5S mini LTE smartphone for $280 is a post from: Liliputing

DIY Delta-3D printer

dangerous prototype - พุธ, 08/20/2014 - 18:00

Vegardpaulsen posted pictures of his DIY Delta-3d printer build:

I have had my trusty Makerbot Thing-o-matic 3d printer for over 3 years, and its time to move on to a bigger, better one, as the cost of buing spareparts on the old one gets higher every day. The trouble of repairing the Makerbot all the time vs the cost of upgrading to a newer one with larger build area and faster buildtimes made it an easy decicion!

I recently purchased the Seemecnc Rostock Max V2 kit from Seemecnc and started putting it together right away when it arrived. With a build area of 28cm diameter, and a build height of almost 40 cm this should be fun!
25+ build hours later, its now time to share some pictures of the build.

Lost PLA Casting With a Little Help From Your Microwave

Hackaday - พุธ, 08/20/2014 - 18:00

[Julia and Mason] have been perfecting their microwave-based lost PLA casting technique over at Hackaday.io. As the name implies, lost PLA is similar to lost wax casting techniques. We’ve covered lost PLA before, but it always involved forges. [Julia and Mason] have moved the entire process over to a pair of microwaves.

Building on the work of the FOSScar project, the pair needed a way to burn the PLA out of a mold with a microwave. The trick is to use a susceptor. Susceptors convert the microwave’s RF energy into thermal energy exactly where it is needed. If you’ve ever nuked a hot pocket, the crisping sleeve is lined with susceptor material. After trying several materials, [Julia and Mason] settled on a mixture of silicon carbide, sugar, water, and alcohol for their susceptor.

The actual technique is pretty simple. A part printed in PLA is coated with susceptor. The part is then placed in a mold made of plaster of paris and perlite. The entire mold is cooked in an unmodified household microwave to burn out the PLA.

A second microwave with a top emitter is used to melt down aluminum, which is then poured into the prepared mold. When the metal cools, the mold is broken away to reveal a part ready to be machined.

We think this is a heck of a lot of work for a single part. Sometimes you really need a metal piece, though. Until metal 3D printing becomes cheap enough for everyone to do at home, this will work pretty well.


Filed under: 3d Printer hacks

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