How a Maker Proposes


[Sefi Attias] just sent us a heartwarming little video of how he proposed to his girlfriend [Tania] — using a little help from technology and other makers.

As a maker, [Sefi] was always building things which impressed [Tania], so he thought it was only fitting to make the proposal a one-of-a-kind maker experience.

He started by designing the engagement ring himself, to be 3D printed. It’s an amazingly complex little thing made up of the repeating words of the quote “I will betroth you to me forever”. It was almost too complex in order to print — but they managed to do it in wax, which allowed them to create a mold and then cast the final part in white gold. Once complete, they set a diamond in place to cap it all off.

The second step was the proposal, which was made possible using a quadrotor, a strip of RGB LEDs, and a long camera exposure. To show it off in real-time to [Tania] they setup a projector and screen on the side of the street, providing a surreal window into the park behind them. It was all made possible with the help from over 20 people from the XLN Makerspace and SkyLens (the quadrotor people).

Oh yeah, and she said yes.

[Read more...]

The Autopilot Shield For The Raspberry Pi


In the world of drones, quadcopters, and unmanned aerial vehicles, the community has pretty much settled on AVR microcontrollers for the low end, and ARM for the high performance boards. If the FAA doesn’t screw things up, there will soon be another market that requires even more computational power, and Navio, the autopilot shield for the Pi, is just the thing for it.

Where high end multicopter and autopilot boards like the OpenPilot Revolution use ARM micros, there’s a small but demanding segment of the hobby that needs even more processing power. Think of something like the Outback Challenge, where fixed-wing drones search the desert for a lost mannequin autonomously. You’re going to need OpenCV for that, and that means Linux.

Navio is a shield for the Raspberry Pi, complete with a barometric pressure sensor, gyros, accelerometer, and compass, and GPS. It’s designed to run a more real-time version of Linux, and has the ability to do some interesting telemetry configurations – putting a 3G modem on the Navio isn’t much of a problem, and since it’s a Raspi, doing image processing of a downward facing camera is just a matter of writing the code.

The Navio team is currently running an Indiegogo campaign, with the baseline version available for $145. That’s pretty close to the price of the OpenPilot Revolution. There’s also a version upgraded with the U-blox NEO-6T that allows for on-board processing of raw GPS data.

Chocolate Quadrotor Proves You Can Make Anything Fly

Chocolate Quadrotor

With the advancements in quadrotor parts and technology over the years, it’s become possible to make just about anything fly if you can strap some high-speed rotors to it. Introducing the first edible quadrotor!

[Michael] enjoys building and flying quadrotors. His girlfriend enjoys baking and making chocolates. One day she had a crazy idea — what if they made a quadrotor together, combining their unique skill sets? [Michael] was a bit skeptical at first. After all, chocolate doesn’t really compare to aluminum or carbon for a frame material… and chocolate melts at room temperature. Regardless — they were curious enough to try it out and see for sure.

First they built a wooden prototype and then created a silicone mold from it. Using Styrofoam and metal spacers for the electronics mounts they filled the mold with chocolate and let it set. A bit of assembly later and they had a chocolate quadrotor. It flies too.

[Read more...]

Analog Shield and PCB Quadcopter


We spent a little bit of time at the TI booth at Maker Faire to film a pair of interviews. The first is with [Bill Esposito] who is grinding away on his PhD. at Stanford. He’s showing off an Analog Shield for Arduino. He describes it as “an attempt to bring the analog bench to an Arduino shield”. We think this is a fantastic idea as most who are learning digital electronics through Arduino have little or no experience with analog circuitry. This is a nice gateway drug for the concepts.

The analog shield has a supply good for +/- 7.5 volts, 4-channel ADC, 4-channel DAC, and gets 100k samples at 16-bits. He showed us a spectrum analyzer using Fast Fourier Transform on the incoming signal from a microphone. He also built a function generator around the shield. And finally a synthesizer which plays MIDI files.

In the second half of the video we take a look at [Trey German's] work on a PCB-based quadcopter. His goal is to reduce the power consumption which will equate to longer flying times. To this end he chose the DRV8312 and a Piccolo to control each sensorless, brushless DC motor. The result should be 10% lower power consumption that his previous version.


Super Simple Gimbal For Multi-Rotor Aircraft Laughs In The Face Of Complexity

Super Simple Multi Rotor Gimbal

After the first flight of your newly built multi-copter, you will immediately want to add a camera. This sequence of events follows the laws of physics and is as predictable as gravity. Just strapping a camera on by way of a fixed bracket may technically solve that problem, but it creates another. A multi-copter tilts and rolls as a result of changing flight direction. If the multi-copter tilts and rolls, so does your camera. This is where a gimbal comes in handy, it adjusts the camera in an equal and opposite direction than that of the aircraft. If the aircraft tilts forward, the gimbal tilts the camera backward the same amount. The result is a steady camera for capturing some sweet videography.

Super Simple Multi Rotor GimbalTeam SSG over at has come up with what they are calling the Super Simple Gimbal. Their vision was a gimbal that would be inexpensive, easy to build and add minimal weight to the aircraft. On a normal gimbal, there are two motors or servos, each one specifically controls a single axis of movement. On the SSG, there are 2 servos but they do not move independently from one another. The camera is mounted to a plate that is supported on one end by a piece of silicone tube which becomes a fulcrum for the system. The other side of this plate is supported by 2 linkages (also made of silicone tube) that are themselves connected to the servos. If both servos move up, the camera is tilted down. If the right servo moves up and the left down, the camera is tilted to the left.

[Read more...]

A Huge, Lightweight Wooden Quadrotor


[Robert] once built a quadcopter frame by sawing laminate floor tile. It worked, we’re taking the lack of pictures of this build as evidence of how ugly it was. His latest design used a much better looking material – laser cut plywood – and the finished product is very strong and lightweight, even compared to commercial frames made with glass or carbon fiber and epoxy.

Although the design went smoothly thanks to some Solidworks skills, actually cutting the frame from 3mm birch ply resulted in a few issues. The cheap laser cutter used for cutting include some bottom of the line software called LaserWorksV5. There is a kerf compensation feature, called ‘sew compensation’ in the software’s native Chinglish. The software would always crash whenever it tried to calculate the compensation for circles. [Robert] spent two hours figuring this problem out, and in the end needed to break out a piece of sand paper to get a nice interlocking fit.

The completed frame bolts together without any glue at all, and the best part about it is the weight – only 167 grams. Compare that to a similarly sized glass fiber frame, and [Robert]‘s shaved at least 200 grams off his finished build.

High Altitude Glider Will Be Dropped From a Balloon!

Glider from space

[House4Hack] and [HABEX] have teamed up to design and build a glider system that can be taken up 30-40km via a weather balloon, dropped, and flown home via FPV.

Of course, this has been done before, but you know what, it’s such a cool experiment, and so few people have done it… who cares! The goal is to hit at least 20km altitude, hope for 30km, and if possible — 40km would break records. For reference, the one we linked made it 33km up.

The plane is a Mini-talon V-tail, which was donated to them by their local hobby shop as a sponsorship. It features an ArduPlane Autopilot module, a 1.2GHz video transmitter, a long range 433MHz receiver for the control signal, and a telemetry data link at 433MHz connected to the ArduPlane. Two GoPro cameras make up its eyes, and it also has a custom release mechanism for letting go of the weather balloon.

[Read more...]


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