Remote Phone Control Using Bluetooth And A Video Stream

February 27, 2011 by Mike Nathan 19 Comments

remote_bluetooth_phone_control

Hack-a-Day reader [Bobbie] sent us a hack that is an adaptation of the automatic cell phone button pushing machine we featured earlier this week. Inspired by that project, he challenged himself to construct a more efficient way to tackle the problem.

He started out in much the same fashion, pointing a camera at the phone in order to view the display remotely. The main thing he focused on to make his project unique was they way in which the buttons on the phone were activated. He was impressed by the mechanical button pressing rig, but thought it to be overly complicated. Instead, he decided to send button presses over Bluetooth to his phone which happened to be AT+CKPD compatible (PDF).

Not only that, his interface is quite impressive too. Originally planning to use the keyboard to send input to the phone, he changed course and programmed his video stream GUI to register mouse clicks instead. Now, when he clicks one of the phone’s buttons in the video display, the appropriate button press is sent to the phone – Awesome!

Keep reading to see a video of his remote phone interface, you’ll be glad you did.

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Machine Pushes Cellphone Buttons From Anywhere In The World

February 24, 2011 by Mike Szczys 32 Comments

[Mok Young Bacq] works on the weekends for mobile game monitoring service. He has three cellphones that he uses for work, and although you would think this means he could work from anywhere in the world, the roaming charges are a killer. His solution was to build an incredibly intricate machine that can use three different cellphones (PDF) on his behalf.

Above you can see it perched underneath the apex of the ladder, but you’re definitely going to want to watch the video after the break. This interface method uses a camera to look at each phone. It’s hung pointing downward and moves like a pendulum to look at one of the three screens at a time. Each phone has one servo motor for each button, which uses a flexible cable as an actuator. Now he can take trips abroad, just checking in over the Internet for his two 17-hour weekend shifts (10am to 3am the next morning) working the phones.

This reminds us of the cellphone endurance tests. What happens when a button stops working?

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DARPA’s Hummingbird Spybot

February 22, 2011 by Mike Szczys 21 Comments

Nope, this isn’t some extravagant fishing lure, it’s the US Government’s newest way to spy on its ~~people~~ enemies. The hummingbird bot has no problems flying like an actual hummingbird while recording video. It was developed by a company called Aerovironment as part of a Defense Advanced Research Projects Agency (DARPA) contract. Of course details are scarce, but you can see the device flying around while broadcasting its video feed after the break. Sure, it’s making much more noise than you would expect from an actual hummingbird, but this is just the version that they’re shown off publicly, right?

It has certainly come a long way since the company was awarded the contract few years back. We assume that the hummingbird is the realization of research efforts pumped into their ornithopter project. Those proofs of concept from 2009 on what was called Project Mercury showed off a winged flyer in a controlled environment. To see this year’s model flying out in the open is pretty neat.

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KiwiDrive HouseBot

February 22, 2011 by Mike Szczys 12 Comments

Forskningsavdelningen, a Swedish hackerspace, had a hackathon last weekend and the KiwiDrive HouseBot is one of the items that resulted from the group effort. They set a goal to use standard, easy to obtain parts, so that the robotic platform would be accessible for reproduction by individuals or at other hackerspaces. The three-limbed device rolls around on a triad of omni-directional wheels -which are probably the hardest part to source but you can always print your own. An Arduino Uno was used as the hardware interface, driving the three stepper motors for locomotion.

It’s not pictured above, but the fourth generation of the little guy also includes a webcam. The camera rides in the center of the body and is mounted on a servo. This makes it possible to turn the camera, meaning there’s no real front or back to this design. Future plans include adding an on-board computer (this is larger than it appears) and implementing emoticons on an 8×8 LED matrix, presumably so you can tell how the bot is feeling today.

[Thanks KiwiRay]

Bellows Camera To DSLR

February 11, 2011 by Kevin Dady 4 Comments

[Jonas Kroyer] is a digital photographer, with a fascination with old cameras and pairing the two together sounded like a fun idea. Searching around on the net he fell in love with the design of the Zeiss Ikon Ikonette (1929-31), and found one with a chipped lens.

After dismantling the camera completely, it was found out that he needed the lens/shutter mechanism, the bellows, and the rails that allow the lens to slide back and forth. The bellows were glued to the body of the camera, but some careful prying and they were quickly removed unharmed. Next was to make an adapter so he could attach the lens to a digital DSLR camera, a steel plate and a Nikon Bayonet swiped off of a no name lens holds everything together. Rails were reattached using rivets, and the bellows were glued onto the plate. Other mods include adding small brass knobs to aid in adjustments, and a spring from a ballpoint pen to hold the original shutter open.

The new old lens is said to be easy to operate, and produces some beautiful images. Though since the lens does not have any modern day coatings it does have its drawbacks, like a diamond shaped flare in the middle of the image, which can be good when you want it, or partially removed in photoshop if you don’t.

Is Your Camera Lying?

January 17, 2011 by James Munns 25 Comments

It is easy to rely on the ratings marked on different tools, whether it is a power supply, scale, or speedometer. However calibration is essential for any part that is relied upon either professionally or for a hobby. [Jeremy] wanted to see if his Lomography camera shutter really was only open for 1/100ths of a second when set to that. In order to test his rig, he set up an LED on one side of the shutter, and a high speed phototransistor to gauge the time spent open, using an oscilloscope to measure the time the reference point was pulled low. In his case, when the camera was set to 1/100, the shutter was actually open for closer to 1/150th of a second (the mean was 1/148ths of a second, with a standard deviation of 417 uSecs). This difference can make a large difference in picture brightness.

Be sure to check his blog for more pictures of the setup, as well as some useful part references and circuit diagrams.

Lego Pinhole Camera

December 30, 2010 by Mike Szczys 8 Comments

[Bshikin] built a pinhole camera out of Lego pieces (translated). It is a fully automated unit thanks to the integration of the NXT pieces. It took a bit of careful calculation to get the film spacing adjusted to match the focal length, and quite a bit of tape was necessary to keep light out of the film chamber. But in the end, it’s an amazing build that takes decent pictures. The software has settings for film size and speed, and takes care of exposing and advancing the frame at the click of a button. See for yourself after the break.

If you hunger for some more camera building goodness check out this SLR hand crafted from scratch.

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