"arduino" entries

Hot Swap Devices and Increase Arduino Interface Options with I2C

Don't be afraid of the bus

After a short period of time, beginners working with the Arduino development boards often find themselves wanting to work with a greater range of input or sensor devices—such as real-time clocks, temperature sensors, or digital potentiometers.

However each of these can often require connection by one of the two digital data buses, known as SPI and I2C. After searching around the Internet, inexperienced users may become confused about the bus type and how to send and receive data with them, then give up.

This is a shame as such interfaces are quite simple to use and can be easily understood with the right explanation. For example let’s consider the I2C bus. It’s a simple serial data link that allows a master device (such as the Arduino) to communicate with one or more slave devices (such as port expanders, temperature sensors, EEPROMs, real-time clocks, and more).
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Radar podcast: the Internet of Things, PRISM, and defense technology that goes civilian

A strange ad from a defense contractor leads us to talk about technology transfer, and Edward Snowden chooses an unnecessarily inflammatory refuge.

On this week’s podcast, Jim Stogdill, Roger Magoulas and I talk about things that have been on our minds lately: the NSA’s surveillance programs, what defense contractors will do with their technology as defense budgets dry up, and a Californian who isn’t doing what you think he’s doing with hydroponics.

The odd ad in The Economist that caught Jon's attention, from Dassault Systemes.

The odd ad in The Economist that caught Jon’s attention, from Dassault Systemes. Does this suggest that contractors, contemplating years of American and European austerity, are looking for ways to market defense technologies to the civilian world?

Because we’re friendly Web stewards, we provide links to the more obscure things that we talk about in our podcasts. Here they are.

If you enjoyed this podcast, be sure to subscribe on iTunes, on SoundCloud, or directly through our podcast RSS feed.

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Comments: 5

A First Slice of Raspberry Pi

Tips on Getting Started with Simon Monk

Simon Monk @simonmonk2 is a full-time author who focuses his writing talents on open source hardware topics. He is currently writing the Raspberry Pi Cookbook which will be available in early release in July and in final release in the fall. Recently, I had the opportunity to sit down with Simon and we talked about one of the coolest things in open source hardware today, the Raspberry Pi.

Key highlights include:

  • Invest in a Raspberry Pi starter kit [Discussed at 0:29]
  • Python is probably the best bet for beginners [Discussed at 1:25]
  • Raspberry Pi and Arduino are both great but really excel in different ways [Discussed at 3:54]
  • How about when Raspberry Pi and Arduino are used together? [Discussed at 5:14]
  • Save time and avoid common mistakes like hardware compatibility issues [Discussed at 7:23]
  • Overclocking helps performance [Discussed at 8:47]

You can view the full interview here:

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Comment: 1
Four short links: 16 April 2013

Four short links: 16 April 2013

Email Triage, Pulse Detection, Big Building Data, and Raspberryduino Ardpi

  1. Triage — iPhone app to quickly triage your email in your downtime. See also the backstory. Awesome UI.
  2. Webcam Pulse Detector — I was wondering how long it would take someone to do the Eulerian video magnification in real code. Now I’m wondering how long it will take the patent-inspired takedown…
  3. How Microsoft Quietly Built the City of the FutureThe team now collects 500 million data transactions every 24 hours, and the smart buildings software presents engineers with prioritized lists of misbehaving equipment. Algorithms can balance out the cost of a fix in terms of money and energy being wasted with other factors such as how much impact fixing it will have on employees who work in that building. Because of that kind of analysis, a lower-cost problem in a research lab with critical operations may rank higher priority-wise than a higher-cost fix that directly affects few. Almost half of the issues the system identifies can be corrected in under a minute, Smith says.
  4. UDOO (Kickstarter) — mini PC that could run either Android or Linux, with an Arduino-compatible board embedded. Like faster Raspberry Pi but with Arduino Due-compatible I/O.
Comments: 2
Four short links: 26 Feb 2013

Four short links: 26 Feb 2013

Data Classes, Short Text Classification, Movie Lovers, and Mesh Networking for Hardware Hackers

  1. School of Data — free online courses around data science and visualization.
  2. libshorttext — classify and analyse short-text of things like titles, questions, sentences, and short messages. MIT-style open source license, Python and C++ source.
  3. Letterboxd — a site for movie lovers from Kiwi Foo alums. I love people who build experiences to help people express their love of things.
  4. RadioBlocks and SimpleMesh — mesh networking for Arduino.
Comment: 1
Four short links: 19 February 2013

Four short links: 19 February 2013

Underground Economy, Continuous Integration, Chinese Cyber-Espionage, Prosthesis From The Future

  1. Using Silk Road — exploring the transactions, probability of being busted, and more. Had me at the heading Silk Road as Cyphernomicon’s black markets. Estimates of risk of participating in the underground economy.
  2. Travis CIa hosted continuous integration service for the open source community. It is integrated with GitHub.
  3. Chinese Cyber-Espionage Unit (PDF) — exposé of one of China’s Cyber Espionage Units. (via Reddit /r/netsec)
  4. $250 Arduino-Powered Hand Made by a Teenthe third version of his robotic hand. The hand is primarily made with 3D printing, with the exception of motors, gears, and other hardware. The control system is activated by flexing a pre-chosen muscle, such as curling your toes, then the movement is chosen and controlled by a series of eyeblinks and an EEG headset to measure brainwaves. The most remarkable part is that the hand costs a mere $250.
Four short links: 31 December 2012

Four short links: 31 December 2012

Vanishing Landlines, Factory Help, Spectral Analyzer, and the State of the World

  1. Wireless Substitution (BoingBoing, CDC) — very nice graph showing the decline in landlines/growth in wireless.
  2. Maker’s RowOur mission is to make the manufacturing process simple to understand and easy to access. From large corporations to first time designers, we are providing unparalleled access to industry-specific factories and suppliers across the United States.
  3. mySight (GitHub) — myspectral.com Spectruino analyzer for light spectra in UV/VIS/NIR.
  4. State of the World (Bruce Sterling, John Lebkowsky) — always a delight. Come 2013, I think it’s time for people in and around the “music industry” to stop blaming themselves, and thinking their situation is somehow special. Whatever happens to musicians will eventually happen to everybody. Nobody was or is really much better at “digital transition” than musicians were and are. If you’re superb at digitalization, that’s no great solution either. You just have to auto-disrupt and re-invent yourself over and over and over again.
Four short links: 26 December 2012

Four short links: 26 December 2012

Remote-Controlled Arduino, JS Notifications, Device Numbers, and Network Hostility

  1. Arduino IR Remote Control — control your Arduino project via your TV’s remote control. (via Arduino)
  2. holler — WTFPL-licensed Javascript library for real-time in-app notifications via the commandline (uses node). (via Javascript Weekly)
  3. First Tweets — numbers of “first tweet from my new {X}” giving indications of the popularity of each. Not good for Surface, alas.
  4. It’s Clear Verizon is Blocking Google Wallet Anti-Competitively — Verizon blocked Google’s mobile payments app until Verizon’s own was available. One irony of course is that in conjunction with Verizon, Google worked to gut meaningful network neutrality rules that would have prevented this very thing from happening on wireless networks.
Comment: 1
Four short links: 25 December 2012

Four short links: 25 December 2012

Regressive Future, Data Viz, Sterile Pump, and Javascript App Kit

  1. RebelMouse — aggregates FB, Twitter, Instagram, G+ content w/Pinboard-like aesthetics. It’s like aggregators we’ve had since 2004, but in this Brave New World we have to authenticate to a blogging service to get our own public posts out in a machine-readable form. 2012: it’s like 2000 but now we have FOUR AOLs! We’ve traded paywalls for graywalls, but the walls are still there. (via Poynter)
  2. Data Visualization Course Wiki — wiki for Stanford course cs448b, covering visualization with examples and critiques.
  3. Peristaltic Pump — for your Arduino medical projects, a pump that doesn’t touch the liquid it moves so the liquid can stay sterile.
  4. Breeze — MIT-licensed Javascript framework for building rich web apps.
Four short links: 27 August 2012

Four short links: 27 August 2012

Broadband Data, Being Evil, DIY Access Control, and In-Place Web Page Editing

  1. International Broadband Pricing Study Dataset for Reuse3,655 fixed and mobile broadband retail price observations, with fixed broadband pricing data for 93 countries and mobile broadband pricing data for 106 countries.
  2. The Dictator’s Practical Internet Guide to Power Retention — tongue-in-cheek “The goal of this guide is to provide leaders of authoritarian, autocratic, theocratic, totalitarian and other single-leader or single-party regimes with a basic set of guidelines on how to use the internet to ensure you retain the most power for the longest time. The best way to achieve this is to never have your authority contested. This guide will accompany you in the obliteration of political dissidence. By having everyone agree with you, or believe that everyone agrees with you, your stay at the head of state will be long and prosperous.” (via BoingBoing)
  3. Ultra Cinnamon (GitHub) — arduino-based monitor & access system for restricted locations.
  4. CKEditor Beta 4 Out — moving to Github, added inline editing. (via Javascript Weekly)