Marcelo Jimenez developed a library to use an Arduino as a JTAG programmer. Basically a Python script uploads a XSVF file to an Arduino which interprets it and performs the necessary JTAG manipulation in order to do the programming.

The project is pretty simple because it just uses  a few resistors and some wires and the library is included in the Arduino library manager or you can check it  on Github.

He also wrote an article to explain some JTAG, SVF and XSVF basics:

 I have recently felt the need to incorporate a JTAG port in a project to program a hardware that contained a CPLD. The idea was to both program it and perform some integrity tests on the board. I imagined something using pogo pins, to make it easier and quicker to test everything. I would also write the necessary test routines and generate some kind of report.

With this objective in mind, I have decided to design an Arduino shield to do the job. The testing routines were not really a big deal. And I was sure I would find some JTAG library for Arduino ready to be used. That was not the case.

There were some projects using Arduino to control a JTAG TAP (Test Access Port), but they were all incomplete. And I had no idea what was really JTAG. So I had to study a little bit to make things work for me.

In the end, the challenge proved enlightening. There were some caveats, both from hardware and from software. I’ll try to address them in this article.

Continue reading on his blog.

Originally from Guatemala, Balam Soto is an artist and maker of software and hardware creating interactive art installations and public artworks that fuse low tech with high tech. He recently shared with us a project called Exp.Inst.Rain and running on Arduino Uno:

” Exp.Inst.Rain” is an interactive installation and experimental instrument that incorporates projection and sound generated by a wireless box made of wood, plexiglas, Arduino, electronic components and custom touch sensors. By touching the box at various points, participants create different sounds; these sounds then generate changes in the projection.

It is an analysis of the social and cultural adoption of tangible user interface. Globally, touch devices are increasingly common; people understand how to use them. “Exp.Inst.Rain” analyses this new technology and makes use of this new common understanding to fuse sound and visuals into realtime interactivity.

This artworks it’s power by Arduino and wireless vibes , using Capacitive Touch Sensor and home made aluminum electrode to pick up touch. Custom software acts as a Bridge between the Exp.inst.X and Midi software.

Julian Hespenheide is an interaction designer based in Germany who submitted to Arduino blogpost a writing machine called émile. It’s an interactive installation created in collaboration with Irena Kukric, David Beermann, Jasna Dimitrovskais and using Baudot code - a binary 5-bit code, predecessor of ASCII and EBCDID – intended for telecommunication and electronic devices, representing the entire alphabet.

It runs on Arduino Uno and  translates the bauds (/?b??d/, unit symbol Bd) into moving objects that are being sent over physical tracks in order to illustrate  a simple computational process of 5-bit binary information transmission:

The machine was built in six days with four people. In our group we came to the conclusion, that not every process in a computer is really transparent and it already starts when you type a simple letter on a keyboard. To unwrap this “black box” of data transmission, we set our goal to build a small writing machine where you can literally see bits rolling around. After some research we got back to the beginnings of Telefax machines and data transmission using Baudot-code. We then quickly designed punchcards and mapped them to a slightly altered baudot code table and cut them with a laser cutter from 5mm plywood.
Whenever a marble hits a switch, a short timer goes off and waits for input on the other switches. If no other marbles are hitting those switches, we finally translate the switches that have been hit into the corresponding letter.

Take a look at the machine in action:

If you are a fan of cosplay, props and hand built creations you can’t miss the work of  James Bruton. Based in Uk he’s got a personal project YouTube channel with a new video every week describing his work in details. At the end of June he posted the 34th “episode” of the project started nearly a year ago about  building an Iron Man Hulkbuster giant suit you can actually wear!

In the video below you can follow how he’s sorting out the arm mechatronics for the elbow, hand and cuff weapon with some 3D printing with Lulzbot and controlling the interaction with  Arduino Uno (electronic part starting around minute 10):

Explore the playlist of the project for other cool videos.

Arduino user named Muiota shared with us an experimental DIY music project running on Arduino Uno and  solenoids.

Take a look at the video to hear how it sounds:

We are proud to share with you the link to purchase the first batch of Arduino Uno ($24.95) assembled in US by Adafruit and created by #TeamArduinoCC.

The partnership started last May when Massimo announced it during Maker Faire San Mateo. Right after our team at Arduino and Adafruit team did all the best they could the make it happen on July the 4th, Independence Day! Now, it’s real! Arduino Uno can be back in your hands allowing you to create amazing interactive projects and, at the same time, supporting the open source community!

The partnership started last May when Massimo announced it during Maker Faire San Mateo. Right after that day, our team at Arduino and Adafruit team did all the best they could the make it happen on July the 4th, Independence Day! Now, it’s real! Arduino Uno can be back in your hands allowing you to create amazing interactive projects and, at the same time, supporting the open source community!

If you take a close look at the back of the board, you’ll find the “Assembled in USA” tag and also the new Genuino logo, Arduino sister-brand. We are adding the Genuino logo to make it easier for the Arduino community to spot original boards and we are going to include this logo to all genuine Arduino boards from now on (like we did for the recently-released Arduino Zero).

Everyone has a Maker in them. We make for fun and exploration, we make to test ideas, and we make to solve real-world problems. Ponytrap wasn’t intended to be a Maker band — we just seemed to have a difficult time finding a drummer that wanted to play the classically-inspired tribal rhythm industrial music that […]

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The post How to Make a Robotic Drum Using Arduino appeared first on Make: DIY Projects, How-Tos, Electronics, Crafts and Ideas for Makers.

If you’ve ever watched MotoGP (motorcycle) racing, you might have wondered how the camera appears to stay level even while the bike turns left and right, nearly becoming horizontal. Saftari was curious about this himself and, rather than simply answering the question, he built a gyroscopic camera rig that allows the camera […]

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The post Motorcycle Gyromount Always Delivers Perfect Video appeared first on Make:.

If you’ve ever watched MotoGP (motorcycle) racing, you might have wondered how the camera appears to stay level even while the bike turns left and right, nearly becoming horizontal. Saftari was curious about this himself and, rather than simply answering the question, he built a gyroscopic camera rig that allows the camera […]

Read more on MAKE

The post Motorcycle Gyromount Always Delivers Perfect Video appeared first on Make:.

Fubar Hackerspace (New Jersey) member Graham has been working on an open source liquid fuel rocket engine with regenerative cooling and precise flow control built on Arduino Uno.  In order to test it he’s also built a cool rig for testing propellant flow control:

My project is building Open Source 3D Printed Rocket Engines with Arduino microcontrollers. As an individual interested in building liquid fueled rocket engines as a hobby I quickly realized there were almost no resources online or forums to share or learn from others. I decided to combine my interests in Software, hardware and open source projects to develop and build a functioning liquid fueled rocket engine. However, unlike most other projects it had to be open source and easily re-produced.

In order to ensure it was as open source as possible I used the Arduino Uno board and IDE to develop software to safely control the engine. To meet the easily reproducible requirement I decided that 3D printing was the right approach rather than labor/time intensive traditional machining.

The end result is an engine that can easily be reproduced or modified. This gives others interested in this hobby a starting point for best practices, safety, etc… so that future projects aren’t starting out from scratch.

All of my design files and software are on GitHub  and a detailed description of the write-up is on the FUBAR labs makerspace wiki 

Here’s the video of the testing of the 3D Printed GOX/Ethanol Injector: