3D Printed Virtual Reality Goggles


Oculus, as we know, was acquired by Facebook for $2 billion, and now the VR community has been buzzing about trying to figure out what to do with all this newly accessible technology. And adding to the interest, the 2nd iteration of the development kits were released, causing a resurgence in virtual reality development as computer generated experiences started pouring out from of every corner of the world. But not everyone can afford the $350 USD price tag to purchase one of these devices, bringing out the need for Do-It-Yourself projects like these 3D printed wearable video goggles via Adafruit.

The design of this project is reminiscent of the VR2GO mobile viewer that came out of the MxR Lab (aka the research environment that spun out Palmer Lucky before he created Oculus). However, the hardware here is more robust and utilizes a 5.6″ display and 50mm aspheric lenses instead of a regular smart phone. The HD monitor is held within a 3D printed enclosure along with an Arduino Micro and 9-DOF motion sensor. The outer hood of the case is composed of a combination of PLA and Ninjaflex printing-filament, keeping the fame rigid while the area around the eyes remain flexible and comfortable. The faceplate is secured with a mounting bracket and a pair of aspheric lenses inside split the screen for stereoscopic video. Head straps were added allowing for the device to fit snugly on one’s face.

At the end of the tutorial, the instructions state that once everything is assembled, all that is required afterwards is to plug in a 9V power adapter and an HDMI cable sourcing video from somewhere else. This should get the console up and running; but it would be interesting to see if this design in the future can eliminate the wires and make this into a portable unit. Regardless of which, this project does a fantastic job at showing what it takes to create a homemade virtual reality device. And as you can see from the product list after the break, the price of the project fits under the $350 DK2 amount, helping to save some money while still providing a fun and educational experience.

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Commodore 1530 Datasette gets a Digital Counter


Ah, the humble Commodore 1530 Datasette drive. It never enjoyed much popularity in the USA, but it was the standard for quite some time in Europe. [DerSchatten13] still uses and loves his 1530. When a co-worker showed him some 7-segment bubble LEDs, he knew what he had to do. Thus the 1530 digital counter (translated) was born.

[DerSchatten13] started out by building his design on a breadboard. He used every I/O pin on an ATtiny2313 to implement his circuit. Tape motion is detected by a home-made rotary encoder connected to the original mechanical counter’s belt drive. To keep the pin count down, [DerSchatten13] multiplexed the LEDs on the display.

Now came the hard part, tearing into the 1530 and removing the mechanical counter. [DerSchatten13] glued in some standoffs to hold the new PCB. After rebuilding the circuit on a piece of perfboard, he installed the new parts. The final result looks great on the inside. From the outside, one would be hard pressed to tell the digital counter wasn’t original equipment.

Operation of the digital counter is identical to the analog unit – with one exception. The clear button now serves double duty. Pressing and holding it saves the current count. Save mode is indicated by turning on the decimal point. If the user rewinds the tape, the counter will stop the motor when the saved count is reached. Cueing up that saved program just got a heck of a lot easier!

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An Open Source 1MHz Arbitrary Waveform Generator with an Awesome UI



[Herp] just shared a nice 1MHz Arbitrary Waveform Generator (right click -> translate to English as google translation links don’t work) with a well designed user interface. His platform is based around a PIC32, a TFT module with its touchscreen and the 75MHz AD9834 Direct Digital Synthesizer (DDS). Of course the latter could generate signals with frequencies up to 37.5MHz… but that’s only if two output points are good enough for you.

As you can see in the video embedded below, the ‘tiny dds’ can generate many different kinds of periodic signals and even ones that are directly drawn on the touchscreen. The offset and signal amplitude can be adjusted using several operational amplifiers after the DDS ouput and a separate SMA TTL output is available to use a PIC32 PWM signal. The platform can read WAV audio files stored on microSD cards and also has an analog input for signal monitoring. Follow us after the break for the video.

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DEFCON 22: Hack All the Things


This morning I went to a fantastic talk called Hack All the Things. It was presented by GTVHacker. If you don’t recognize the name, this is the group that hacked the GoogleTV. They haven’t stopped hacking since that success, and this talk is all about 20+ devices that they’ve recently pwned and are making the info public (that link still had oath when I checked but should soon be public).

The attacks they presented come in three flavors: UART, eMMC, and command injection bugs. I’m going to add the break now, but I’ll give a rundown of most of the device exploits they showed off. I found all amusing, and often comical.

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Funky Looking Motor is Powered by Static Electricity

Corona Motor (Electrostatic Drive)

[Steven Dufresne] of Rimstar.org is at it again with another very functional science experiment. This week he’s showing us how he made a large electrostatic motor, also known as a Corona Motor.

A Corona motor makes use of a cool
phenomenon called the Corona discharge, which is the ionization of a fluid
(in this case, air) surrounding a conductor that is energized. He’s done other high voltage experiments that take advantage of this, like his Ion Wind propelled Star Trek Enterprise!corona_motor_electrostatic_atmospheric_motor_diagram

The motor works by using an even number of electrodes on the motor, each electrically charged; positive, negative, positive, negative, etc.

Because each electrode is the opposite charge, they want to repel each other — but since the cylinder is electrically insulated, the charges have no where to go — instead the cylinder begins to rotate as the charges attract back and forth — when a positive charge on the insulation meets a negatively charged electrode, the charge is removed by ionization (creating the corona effect), and the cycle continues. The direction of rotation is determined by the angle of the electrodes. The motor can get going pretty fast but doesn’t have that much torque or power.

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More Pole Climbing Bots, Haul Antennas and Bikes

Pole Climbing Robot

A few days ago we posted about a Pole Climbing Device. Since then we’ve gotten a few emails with tips about other pole climbers. We are going to talk about two of those here, they are completely different from each other and have completely different uses. Who knew there was such a variety of pole climber bots out there?

First up is this an antenna-wielding bot that climbs up poles in order to promote over the air communications. The system is called E-APS (Emergency Antenna Platform System) and is used by enthusiasts to turn any ol’ parking lot lamp post into an antenna tower. This particular machine has a large rectangular frame made from extruded aluminum. There are four wheels, two of which are driven by what appears to be a car power window motor. The weight of the antenna forces each set of two wheels to be pressed up against opposite sides of the pole, creating enough friction to not only support the unit but allow it to travel up and down the pole. There is not a lot of explanation about the build but there are a lot of detailed photos of the final product. We saw E-APS in action at MakerFaire New York 2013, and it was very impressive.

We’ve covered this next device before but it’s worth mentioning again. The project assumes that no bike lock is strong enough to deter the most persistent thief. Instead of locking your bike up and hoping for the best, this ‘theft preventer’ hikes your bike up out of the reach of would-be bike nabbers. So how do you get your bike down once it is up the pole? A remote control fob, of course.

There are 2 cool videos of these inventions after the break…..

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Twitching Fish Plays Pokemon Underwater


Over a matter of a few days, thousands of people were simultaneously watching this fish named [Grayson Hopper] float around a bowl of water as a webcam recorded its every move and translated the directions it took into a working gameplay of Pokemon Red. Each section of the tank was split into partitions, with each section acting like a button. So when the fish swam over a specific area, the main Pokemon character [Ash] was told where to go.

It was created during a hackNY hackathon within 24 hours when the fish started its journey in to the world of Pokemon. Already, a subreddit popped up documenting the adventure. Amazingly enough, [Grayson] chose Charmander as its starting Pokemon and has defeated its rival Squirtle.

This project was great for watching hours on end, especially at work, as the cute little fish went about its life unaware that it is becoming a popular internet star.

Check out the link above to stream the video. There is even a chat bar on the side, which allows anyone to jump into the fishy conversation. If the fish looks dead though, it’s probably just sleeping.

[Thanks for the tip Bailey!]

Also, Pokemon was reborn some vintage hardware recently which allows the player to game via the web. Check that out too!


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