The Rabbit H1 is a Stationary Mouse Replacement

rabbit h1

[Dave] has some big plans to build himself a 1980’s style computer. Most of the time, large-scale projects can be made easier by breaking them down into their smaller components. [Dave] decided to start his project by designing and constructing a custom controller for his future computer. He calls it the Rabbit H1.

[Dave] was inspired by the HOTAS throttle control system, which is commonly used in aviation. The basic idea behind HOTAS is that the pilot has a bunch of controls built right into the throttle stick. This way, the pilot doesn’t ever have to remove his hand from the throttle. [Dave] took this basic concept and ran with it.

He first designed a simple controller shape in OpenSCAD and printed it out on his 3D printer. He tested it out in his hand and realized that it didn’t feel quite right. The second try was more narrow at the top, resulting in a triangular shape. [Dave] then found the most comfortable position for his fingers and marked the piece with a marker. Finally, he measured out all of the markings and transferred them into OpenSCAD to perfect his design.

[Dave] had some fun with OpenSCAD, designing various hinges and plywood inlays for all of the buttons. Lucky for [Dave], both the 3D printer software as well as the CNC router software accept STL files. This meant that he was able to design both parts together in one program and use the output for both machines.

With the physical controller out of the way, it was time to work on the electronics. [Dave] bought a couple of joysticks from Adafruit, as well as a couple of push buttons. One of the joysticks controls the mouse cursor. The other joystick controls scrolling vertically and horizontally, and includes a push button for left-click. The two buttons are used for middle and right-click. All of these inputs are read by a Teensy Arduino. The Teensy is compact and easily capable of emulating a USB mouse, which makes it perfect for this job.

[Dave] has published his designs on Thingiverse if you would like to try to build one of these yourself.


Move Over Humans and Things, Flowers Now On The ‘Net

Tweeting Poppy Plants

The ‘Internet of Flowers’ is upon us thanks to an artist named [Adrian]. He has designed a project that not only monitors the growth of Poppy Flowers but also monitors the soil, air and surrounding activity.

The entire project is based on a Raspberry Pi mounted in a purpose-built enclosure made from laser cut birch plywood. The enclosure is mounted in a window of an adjacent building that has a view of the flower bed. An internally mounted camera was carefully aligned so its field of view was mostly of the plants and would limit taking photos of unknowing passersby. The camera takes a snap shot every 5 minutes, see the time lapse video below.

Tweeting Poppy PlantsA box containing sensors is installed in the flower bed. The intent of this project was not to have the Raspberry Pi spit out hard factual data regarding soil moistness, temperature and ambient noise, but to instead take that data from the sensors and send out a story-like narrative that makes the communication feel more personal. To receive these comments from the poppies, you can follow them on Twitter: @tweetingpoppy.

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Smart Skateboard Box Adds Sound Effects to Your Tricks

Skateboard Sound Effects


Here’s a rather interesting project aimed at making music — using skateboards. It’s called SkateHack, and it’s an open source project that mixes customized hardware, electronics and skating.

They’ve been at work on two different projects, both of which utilize piezoelectric sensors and contact microphones. The first, built in Sweden back in July 2012, is called the Augmented Ramp, which transforms a skateboard half-pipe into a musical instrument. The piezoelectric sensors and contact microphones convert vibrations from the ramp intro digital triggers which are then processed by software to create music. The result is a unique medley which changes with every trick.

The second project is called the Bauxite, which is made much the same, but designed to be easily built by anyone. It’s a skateboard trick box which also transforms grinding and tricks into cool sound effects and music. They call it a skateboard-powered-music-sampler — which in all reality, it is.

For more info check out the videos after the break.

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THP Entry: Embedded Hardware Security With The ChipWhisperer


There are thousands upon thousands of papers discussing various aspects of embedded hardware security, and dozens of books covering the same subject. The attacks discussed in the literature are very cool – things like side-channel power analysis and clock glitching used to extract keys from a system. The experimental setups in these papers are extraordinarily expensive – you can buy a new car for less. [coflynn] was disheartened with the price of these tools, and thought building his own would make for a great entry to The Hackaday Prize.

The hardware part of the ChipWhisperer includes a breakout board with an FPGA, ADC, and connectors for a lot of different probes, adapters, breakout boards, and a target board, With all these tools, it’s not unreasonable to say that [coflynn] could carry out a power analysis attack on a lot of embedded hardware.

Open source hardware is just one part of this entry. The biggest focus of this project is the open source software for analyzing whatever the probes and target boards record. With this software, anyone can monitor the power used when a chip runs a cryptographic function, or glitch a clock for some unintended functionality in a device. In keeping with the academic pedigree of all the literature on these attacks, there are a ton of tutorials for the ChipWhisperer for all those budding security researchers out there. Very cool stuff, and arguably one of the most technical entries to The Hackaday Prize.

Video below.

SpaceWrencherThe project featured in this post is an entry in The Hackaday Prize. Build something awesome and win a trip to space or hundreds of other prizes.

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The Hacklet #6 – Lasers

Hacklet 6

This week’s Hacklet is all about lasers, which have been shining a monochromatic light for hackers since 1960. The first working laser was demonstrated by [Theodore Maiman], who was a hacker / maker himself, having learned circuits in his father’s home electronics lab. It’s no surprise that lasers have been hugely popular in the hacker community ever since.

laserwelder[Maiman's] first laser was pumped with flash tubes, which is similar to the YAG laser in [macona's] project to restore a laser welder. He’s gotten his hands on a 1985 model 400W Lumonics laser welder. This welder was originally bought by Tektronix to weld titanium CRT flanges. Time moved on, and the welder was sold to [macona's] company, who used it until the Anorad control system died. There was an effort to bring it up to date with new servos and an OpenCNC control system, but the job was never finished. This laser sat for 12 years before [macona] bought it, and now he’s bringing it back to life with LinuxCNC. The project is off to a blazing start, as he already has the laser outputting about 200 Watts.

d0c96d91On the slightly lower power side of things we have [ThunderSqueak's] 5mW visible red (650nm) laser. [ThunderSqueak] needed an alignment laser with decent focusing optics for her other projects. She mounted a module in a plastic case and added a switch. A quick build, but it’s paying dividends on some of her bigger projects – like her Low Cost CO2 Laser Build, which we featured on the blog back in May.



[phil] used buildlog 2.x as the inspiration for his Simple DIY laser cutter. The laser power comes from a low cost K40 laser tube and head. His frame is aluminum extrusion covered with Dibond, an aluminum composite material used in outdoor signs. Locomotion comes from NEMA 17 stepper motors. Many of [phil's] parts are machined from HDPE plastic, though it looks like they could be 3D printed as well. We bet this one will be a real workhorse when it’s done.


la-cutter2[ebrithil] is working on a combo laser engraver/PCB etcher which will use a solid state laser module. His layout is the standard gantry system seen on many other mills and 3D printers. Dual steppers on the Y axis increase avoid the need for a central belt. His Z axis was donated by an old DVD drive. It has enough power to lift a pen, and should be plenty accurate for focusing duty. He’s already run a couple of great tests with a low power violet laser and glow in the dark material.

openexposer[Mario] is creating an incredibly versitile laser tool in his OpenExposer, which can do everything from stereolithography 3D printing to making music as a laser harp. The genius here is [Mario's] reuse of laser printer parts. Every laser printer uses the same basic setup: a laser, a scanning mirror, and optics to stretch the beam out to a full page width. [Mario] is already getting some great prints from OpenExposer. This project is one to watch in The Hackaday Prize.

ramenspec[fl@C@] is digging into the physics side of things with his DIY 3D Printable RaspberryPi Raman Spectrometer. Raman Spectrometers are usually incredibly expensive pieces of requirement which can tell us which elements make up a given material sample. [fl@C@'s] laser is a 532nm 150mW laser, which bounces through a dizzying array of mirrors and lenses. The resulting data is crunched by a Raspberry Pi to give a full spectrographic analysis. [fl@C@'s] entered his project in The Hackaday Prize, and we featured his bio back in June.

That’s it for this week’s Hacklet, until next week, don’t just sit around wondering why aren’t lasers doing cool stuff. Make it happen, and post it up on!


Another Ball Sucking Machine Leaves You Wanting More

Pneumatic Sponge Ball Accelerator

[Niklas] told us about his newest art project that he is calling a Pneumatic Sponge Ball Accelerator. This isn’t a home workshop type of project, it is a full fledged art exhibit displayed at the Tschumi Pavilion in Groningen / The Netherlands. One-thousand black sponge balls move from a big glass ball-reservoir bubble to another via a 150 meter long track of clear plastic tubing. The balls move up to an impressive 4 meters a second. Admirers of the installation can operate the machine and its airflow from outside the pavilion by pressing their hand up to a touch sensor installed on the wall of the exhibit.

All of the ball movement is powered by an ordinary home vacuum. Since it would be a short display if all the balls traveled in one direction, ending up in just one of the glass bubbles, [Niklas] came up with a simple yet functional valve that reverses the flow of air in the tube. This is done by a rotatable disk with two holes in it. Depending on its position, it connects one of the two bubble to the vacuum, leaving the other vented to outside atmosphere. Since the vacuum side of the path is low pressure and the ambient atmosphere is relative high pressure, the air travels towards the vacuum bringing the foam balls with it. No balls get sucked into the vacuum because the outlet tube is at the top of each bubble.

Pneumatic Sponge Ball Accelerator


Find two videos after the break, they are well worth watching.

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Astronaut Or Astronot: Givin’ Away Scopes

Remember how we said we’d give away an oscilloscope to a random person on if they have voted on projects for The Hackaday Prize? Last week we tried that and no one won. This week we tried it and no one won. Then, because we’re awesome, we picked another person at random on [Rafael] is the winner, with a very nice oscilloscope heading to his doorstep. We’re going to need some contact info, hacker no. 13951, and if anyone has any advice on sending expensive electronics to Brazil, I think we’re going to need it.

We’re doing this again next week, so head on over to and vote. Also, pay no attention to the people who say voting is too hard and complicated and ill planned: they are wrong, and if you suck up enough the Prime Overlord will command that t-shirts and stickers be sent out to you.