[Gjoci] just became a father, and to make up for not having to carry a baby to term he decided to make himself useful in another way. He developed a sensor to detect a baby’s breathing, allaying the fears of nervous parents who are wondering why their child is so quiet.
Unlike similar builds and products that rely on microphones or capacitive sensors, [Gjoci]’s build uses the camera from a wiimote to triangulate points of light and detect motion.
The build started off with infrared LEDs, but the batteries were big and there is always the possibility of the baby swallowing electrical components. [Gjoci] finally hit upon the idea of using small 1mW laser diodes to project points of light. This worked beautifully, and since newborns don’t move much there’s no danger of shining a laser into a baby’s eye.
The rest of the build is just querying the camera every few milliseconds and seeing if the position of the reflections captured by the wiimote camera have changed. In two weeks of operation, [Gjoci] only had to respond to a few false alarms, and the hardware hasn’t crashed at all.
After the break are three videos [Gjoci] put up for us that show a test of the breathing detection system, a demo of the alarm, and an example of the build in full operation. A very awesome build, and we look forward to this post being used as evidence of prior art in a patent dispute a few years down the line.
Continue reading “Making sure a baby is still breathing with lasers and a wiimote”
Trade shows are all about attracting attention and getting people to learn about your product, so what could be better than a custom-built RC blimp? Sure, you could just buy one, but what’s the fun in that? After several design iterations, [Tretton37] came up with a blimp known as the [LeetZeppelin] controlled by an Arduino, an XBee module, as well as a Wiimote controller connected to a computer.
The hack itself is a great example of repurposing off-the-shelf materials into something more interesting and unique. In addition to the components listed above, hobby servos were modded to allow for thrust motor control in conjunction with Legos for the gearing and “pillow-block bearings.” A list of the “important” parts used in this hack is furnished on their site as well as a video of it in action, which is also after the break.
As for the results of this hack as a trade-show attention grabber, Fredrik Leijon had this to say: “We think that all the gazing at the sky and half opened mouths proves that it was a huge success!”
Like all of us, [Jonathan Guberman] has a list of projects and builds that ‘will get done when I have time.’ His Kiwi drive robot is no exception. It’s intended to be one piece of a much larger project, but he decided to document it anyway (we think in the hope of getting is rear in gear).
The robot uses a holonomic drive to get around. A holonomic drive uses three fixed wheels placed 120 degrees apart. The wheels can be independently controlled and with some vector addition the robot can move in any direction and rotate 360º inside its own wheelbase. Of course the wheels will have to be able to roll in two dimensions, so an omniwheel is used. Everything is controlled with a Wiimote nunchuck, and the movement is very smooth.
[Jonathan] has had a few projects featured on Hack A Day before, like his Mechanical Pac-Man and his adorable Portal turret plushie. [Jonathan] really demonstrates his artistry and skill in his project, so we’re really wondering what his ‘larger project’ actually is. Take a guess in the comments section, that might get [Jonathan]’s rear in gear.
Check out the video of the omnidirectional robot after the break.
Continue reading “Omniwheel robot”
The Wiimote is a fantastic tool for hackers, given their affordability and how easy they are to work with. [Gareth] had a “eureka” moment while working on another Wiimote-based project, and with some alterations, converted it into an electronic whiteboard.
The whiteboard was built using the IR sensor he extracted from a Wiimote, which is wired to an EasyProp board to process the input. The Wiimote is aimed at a LCD screen, which can be “drawn” upon using a light pen he constructed from an IR led and a few batteries. Any movement of the pen is tracked by the Wiimote’s IR sensor and converted to an XY coordinate, which is then painted on the screen. The sensor has the ability to track up to four points at a time, so you can theoretically use up to four pens simultaneously.
[Gareth] points out that the sensor is not limited to tracking small displays, as the white board can be easily scaled up in size using any kind of rear projection device.
Continue reading to see a video of his whiteboard in action.
Continue reading “Wiimote-based whiteboard lets you write on any surface”
Those of us that remember when you could actually go to a mall and play on a VR game machine, tend to remember it fondly. What happened? The computing horsepower has grown so much, our graphics now days are simply stunning, yet there’s been no major VR revival. Yeah, those helmets were huge and gave you a headache, but it was worth it. With the 3d positioning abilities of the latest game crazes, the Wiimote and the Kinect, [Nao_u] is finally taking this where we all knew it should have gone(google translated). Well, maybe we would have had less creepy anime faces flying around squirting ink, but the basics are there. He has created a VR system utilizing the Wiimote for his hand position, a Vuzix display for head positioning, and the kinect for body tracking. Even with the creepy flying heads I want to play it, especially after seeing him physically ducking behind boxes in the video after the break. Long live VR!
Continue reading “VR! now with more kinect, wiimote, and vuzix”
While we could be content following our “kiddie d-day” as [Caleb Kraft] suggested. We know you can’t continue such an awesome Friday without trying to blow yourself up first.
This Wiimote Rubens’ tube caught our eye. A PVC Aluminum irrigation pipe is drilled with holes and propane is pumped through. A speaker on one end creates changes in pressure and a neat light show follows suit. [ScaryBunnyMan] went further though, with a collection of software and a Wii Remote he “plays god” controlling the music, and thus, the fire. Check out a fun video after the split.
Continue reading “Wiimote controlled Ruben’s tube”
[ZodTTD] has released a Nintendo 64 emulator for iPhone. It is available (for a price) at the Cydia store and can be installed on jailbroken iPhones. The video shows Wii Remote support as a control interface that uses both buttons and the accelerometer, an addition since we last looked at his work. There is no word about nunchuck functionality, a must if you’re going to try to 100% Mario64.