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by 李正义 23 Apr '14

23 Apr '14

李正义中南民族大学/老师武汉市洪山区民族大道182号

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10A rated 5.5mm / 2.5mm DC barrel connector?
by Andrew Back 13 Apr '14

13 Apr '14

Hello, I'm having difficulty sourcing barrel connector sockets rated at >5A, which is bizarre as numerous reputable suppliers sell 12V/10A desktop PSUs that terminate in a 5.5mm OD / 2.5mm ID barrel plug. Yet, no matter how much searching I do I can only seem to turn up 2.5A rated sockets and, at a push, 5A rated. Grateful for any suggestions or insights anyone can offer here... Cheers, Andrew

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OSHUG #33 -- Radio Pt.2 (Networking Literacy Project, Everyone has a radio in them)
by Andrew Back 02 Apr '14

02 Apr '14

Hello, Registration is now open for the April meeting. Details below. Cheers, Andrew // Event #33 -- Radio Pt.2 (Networking Literacy Project, Everyone has a radio in them) Thursday 24th April 2014, 17:30 - 20:30 at BCS London, 1st Floor, The Davidson Building, 5 Southampton Street, London, WC2E 7HA. Registration: http://oshug.org/event/33 The thirty-third OSHUG meeting will be the second on the theme of radio, with talks on a bold vision for a project that aims to increase understanding of personal networking, and on a toolkit that lets you build your own physical Internet radio. -- The Networking Literacy Project "Beep-BEEP!" - Some of us will remember the distinctive click when throwing the power switch of a BBC Micro, and the immediate gratifying sounds it made. Thirty years ago, public awareness of personal computing was low, and civil society acted to raise literacy in anticipation of the coming boom. Today, computers are pervasive in everyday life, and their function is increasingly to deliver distributed computing applications. Indeed, we are on the cusp of another era of personal technological progress and growth, this time for personal networking. Understanding and literacy about this is low, while importance and opportunity are high. This talk will explore some of the learning opportunities, and how the technology community could contribute to eliminating the widespread functional illiteracy in this important area of technology. Martin Geddes is an authority on the future of the telecoms industry, ranging from emerging business models to new network technologies. He is a futurologist, writer, speaker, consultant, and technologist. Martin is currently writing a book, The Internet is Just a Prototype, on the future of distributed computing. -- Everyone has a radio in them, it turns out Inspired by the challenge of making a physical radio device that did anything interesting and web friendly, a small team within BBC R&D spent a few days building an Archers Avoider using off the shelf components and free software alongside BBC created custom services for controlling audio IP streams. "Radiodan" is now at v2.0 and consists of open source web-developer-friendly software designed to work on a Raspberry Pi, used for controlling audio streams, getting a device on a wifi network, and controlling buttons, dials and leds, plus a kit of parts, a case and some instructions. This talk will take a look at some of Radiodan's technology, in the context of our goal of making it something that anyone can start to build a radio with. It will also explore why it's important and interesting to widen the pool of people who can make radios, and how a new field for us has changed the way we work. Libby Miller is a producer and developer working in the BBC R&D Central Lab. She currently works on Radiodan, a project about cheap, rapid prototyping for radios. She also works on the VistaTV EU project on the use and visualisation of real-time IPTV statistics, and the MediaScape project, which is about developer-friendly standards for connected devices. Before that, she led the BBC's part of NoTube, including work on APIs to TV for second screens, resolution of broadcast metadata to web metadata, synchronised social experiences, and recommendations and serendipity. Note: Please aim to by 18:15 as the first talk will start at 18:30 prompt.

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Chip Hack, 24th & 25th May at Makespace, Cambridge.
by Andrew Back 13 Mar '14

13 Mar '14

Hello, Another Chip Hack, two day introduction to FPGA programming, is being held over the weekend of 24th and 25th May at Makespace in Cambridge. Tickets went on sale yesterday, which includes lunch on both days, and are only £5 thanks to sponsorship from Embecosm. http://chiphackcambridge.eventbrite.co.uk Over half went in the space of a few hours, so if you would like to take part I wouldn't hang about! For more info, workshop materials, and photos and videos from last year's Chip Hack, see: http://chiphack.org/ Cheers, Andrew

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Hardware Freedom Day 2014 in Manchester
by Michael Dorrington 12 Mar '14

12 Mar '14

Please feel free to forward this to those that would welcome it. * Event: Hardware Freedom Day 2014 in Manchester http://wiki.hfday.org/2014/UK/Manchester * Date: Saturday, 15th March 2014 * Start time: 14:00 * Finish time: 17:00 * Location: Fab Lab Manchester - http://www.fablabmanchester.org/contact-us * Address: Chips, 2 Lampwick Lane, New Islington, Manchester, M4 6BU. - "(for sat nav use M4 6EE)" - http://www.openstreetmap.org/#map=18/53.48140/-2.22107 Details ------- Hardware Freedom Day (HFD) is an annual world wide celebration of Free Hardware with the aim of promoting Hardware Freedom to everyone. This year the event lands on Saturday, 15th March. You can see the teams around the world that will be participating on the HFD 2014 Events Map <http://www.hfday.org/map/index.php?year=2014>. This includes Manchester, UK! The event will be a chance to discuss, show and see Free Hardware. The following topics are for discussion (but other Hardware Freedom topics are welcome): * The anti-Free Hardware Restricted Boot (aka Secure Boot) <http://www.fsf.org/campaigns/campaigns/secure-boot-vs-restricted-boot> * Novena <http://www.kosagi.com/w/index.php?title=Novena_Main_Page> * Arduino <http://en.wikipedia.org/wiki/Arduino> * Openmoko <http://en.wikipedia.org/wiki/Openmoko> * GTA04 by Golden Delicious <http://en.wikipedia.org/wiki/Openmoko#Golden_Delicious_GTA04_board> * XiVO <http://blog.xivo.fr/> * Pandora <http://en.wikipedia.org/wiki/Pandora_%28console%29> * Ben NanoNote <http://en.wikipedia.org/wiki/Ben_NanoNote> * Crypto Stick <https://www.crypto-stick.com/> * miniCNC <http://www.repairablemachines.com/introduction.html> * OH&A <http://www.ohanda.org/> * OSHUG <http://oshug.org/> If you have a device/design that gives the 4 Freedoms of Free Software as applied to a device/design and would like to tell others about it then please give a talk/demo at this event. If you are going to do a talk/demo then preferably send an email letting us know to: fsuk-manchester-team(a)nongnu.org The event will end with a tour of Fab Lab. Look forward to seeing you there. Location -------- Fab Lab Manchester is a great location for HFD, more information at: http://www.fablabmanchester.org/about-us Parking ------- There is cheap paid parking on site. Public Transport ---------------- The New Islington Metrolink Station <http://www.metrolink.co.uk/stationinfo/Pages/New-Islington.aspx> is nearby. More Information ---------------- More information available at: http://wiki.hfday.org/2014/UK/Manchester Regards, Mike. -- FSF member #9429 http://www.fsf.org/register_form?referrer=9429 http://www.fsf.org/about "The Free Software Foundation (FSF) is a nonprofit with a worldwide mission to promote computer user freedom and to defend the rights of all free software users."

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Qt on Android: Coffee and Code Workshop - London 10/03/2014.
by Andrew Back 06 Mar '14

06 Mar '14

Hello, The BCS OSSG are hosting an event next Monday which may be of interest to some folks: "Learn how to develop and deploy an Android app using Qt or gain insight into why targeting Android makes good business sense! On March 10, hosted by the BCS Open Source Specialist Group, KDAB's BogDan Vatra, the man who ported Qt for use with Android, will be coming to London as part of a 3-City tour. He will conduct a three hour workshop Free to Qt enthusiasts. Not just a simple how-to, this session will include insightful discussions on why things are the way they are, how the internals of Qt on Android work and how Qt itself is deployed on Android devices." http://ossg.bcs.org/2014/01/30/qt-on-android-coffee-and-code-workshop-londo… Cheers, Andrew

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Invitation to connect on LinkedIn
by Jacob Mani 03 Mar '14

03 Mar '14

I'd like to add you to my professional network on LinkedIn. - Jacob Accept: https://www.linkedin.com/e/v2?e=494kma-hsbgvuii-6r&a=preRegInvite&tracking=… You are receiving Invitation to Connect emails. Unsubscribe here: https://www.linkedin.com/e/v2?e=494kma-hsbgvuii-6r&t=uns&tracking=eml-guest… Learn why we included this at the following link: http://www.linkedin.com/e/v2?e=494kma-hsbgvuii-6r&a=customerServiceUrl&ek=i… © 2014, LinkedIn Corporation. 2029 Stierlin Ct. Mountain View, CA 94043, USA

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MFS Meeting. Tue, 18 Mar. Talk: "The GNU Compiler Collection: How to Use, Port and Upstream the World's Most Widely Used Tool Chain"
by Michael Dorrington 27 Feb '14

27 Feb '14

Please feel free to forward this to those that would welcome it. * Event: Manchester Free Software's March Meeting * Talk: The GNU Compiler Collection: How to Use, Port and Upstream the World's Most Widely Used Tool Chain * Speaker: Dr Jeremy Bennett (Embecosm) (and Joern Rennecke (Embecosm) for Q&A) * Date: Tuesday, 18th March 2014 (3rd Tuesday of the month) * Start time: 19:00 * Finish time: 20:30 (and then on for drinks) * Location: Madlab. (Manchester Digital Laboratory). - http://madlab.org.uk/ * Address: 36-40 Edge Street, Manchester. M4 1HN. - Opposite "Common" on Edge Street, Northern Quarter. - http://www.openstreetmap.org/#map=19/53.48413/-2.23639 Details ------- The purpose of Manchester Free Software is to promote the Free Software philosophy. This meeting will be a talk with Q&A. "The GNU Compiler Collection (GCC) is 28 years old this year. Originally a C compiler, it now handles many languages (8 in the official distribution) and has been ported to many architectures (nearly 50 in the official distribution). Alongside the compiler are low level binary utilities (assembler, disassembler, linker, profiler, etc.) and a source level debugger (GDB). At 5 million lines of code, GCC is the third largest program in any GNU/Linux system. In this talk we'll look at how to best use the tool chain. Starting with official distributions, we'll look at what is needed to build your own version from source code. We'll then explore what it takes to modify the tool chain, to port it to a new architecture, to test it, and ultimately to have your code accepted into the official FSF distribution. We'll also look at some of the more unusual uses of the tool chain. Its porting to new chips during the design phase to test the hardware design before spinning silicon. How approaches such as iterative compilation and genetic algorithms can double performance compared to -O3. And finally how compilers can use machine learning to work out the best optimizations for your program and even optimize for energy efficiency. Throughout the talks we'll use practical examples from both native compilers (for Intel and ARM) and for cross compilers (such as Atmel AVR and Adapteva Epiphany). We'll also demonstrate the low cost free hardware energy measurement board used to optimize for energy efficiency." Speakers -------- "Dr Jeremy Bennett is Chief Executive of Embecosm, an free/libre and open source software consultancy specializing in tool chain development and silicon chip modelling. A former academic he is author of "Introduction to Compiling Techniques" (McGraw-Hill 1990, 1995, 2003). Joern Rennecke, who leads GCC development for Embecosm, will take questions at the end of the talk. Joern is one of the leading developers of GCC, a project to which he has been contributing for nearly 20 years. He has been responsible for the Renesas SH, OpenRISC 1000, Synopsys ARC ports and most recently has been developing the Atmel AVR and Adapteva Epiphany implementations. Embecosm are currently hiring both trainee and experienced compiler developers. Details at http://www.embecosm.com/careers/." After-meeting ------------- The meeting will be followed by informal discussion and socialising in the bar opposite, Common <http://www.aplacecalledcommon.co.uk/>. There are soft drinks available and there is no pressure to consume alcohol. Location -------- The meeting will take place at the usual venue of Madlab, details above. Ring the bell beside the door to be let in. The venue provides wifi. Parking ------- Around the venue there are parking meter bays that become zero cost after 8pm on Tuesday so you will have to pay up until then and the maximum stay is 2 hours BUT MAKE SURE YOU VERIFY ALL THIS on parking. There are paid parking lots around the venue, they are marked by a blue P in this OpenStreetMap centred on Madlab <http://www.openstreetmap.org/#map=15/53.4843/-2.2365>. Most of those parking lots are owned by NCP <http://www.ncp.co.uk/>. If you can’t decide otherwise then park in Manchester Arndale <http://www.manchesterarndale.com/directions.aspx>. Public Transport ---------------- Manchester Victoria (MCV) train station, Shudehill tram and bus station, and Manchester Piccadilly bus station are all fairly close to Madlab, see OpenStreetMap centred on Madlab <http://www.openstreetmap.org/#map=15/53.4843/-2.2365>. Manchester Piccadilly (MAN) train station and Manchester Central Coach Station are not too far away either. More Information ---------------- Information about Manchester Free Software can be found on the Manchester Free Software pages on LibrePlanet <http://libreplanet.org/wiki/Manchester>. Regards, Mike. -- FSF member #9429 http://www.fsf.org/register_form?referrer=9429 http://www.fsf.org/about "The Free Software Foundation (FSF) is a nonprofit with a worldwide mission to promote computer user freedom and to defend the rights of all free software users."

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OSHUG #32 -- Embedded Scripting, 27th March 2014.
by Andrew Back 27 Feb '14

27 Feb '14

Hello, Registration is now open for the March meeting. Details below. Regards, Andrew // Event #32 -- Embedded Scripting (Lua, Espruino, Micro Python) 27th March 2014, 17:30 - 20:30 at BCS London, 1st Floor, The Davidson Building, 5 Southampton Street, London, WC2E 7HA. Registration: http://oshug.org/event/32 The thirty-second OSHUG meeting will take a look at the use of scripting languages with deeply embedded computing platforms, which have much more constrained resources than the platforms which were originally targeted by the languages. -- Programming a microcontroller with Lua eLua is a full version of the Lua programming language for microcontrollers, running on bare metal. Lua provides a modern high level dynamicaly typed language, with first class functions, coroutines and an API for interacting with C code, and yet which is very small and can run in a memory constrained environment. This talk will cover the Lua language and microcontroller environment, and show it running on-off-the-shelf ARM Cortex boards as well as the Mizar32, an open hardware design built especially for eLua. Justin Cormack is a software developer based in London. He previously worked at a startup that built LED displays and retains a fondness for hardware. He organizes the London Lua User Group, which hosts talks on the Lua programming language. -- Bringing JavaScript to Microcontrollers This talk will discuss the benefits and challenges of running a modern scripting language on microcontrollers with extremely limited resources. In particular we will take a look at the Espruino JavaScript interpreter and how it addresses these challenges and manages to run in less than 8kB of RAM. Gordon Williams has developed software for companies such as Altera, Nokia, Microsoft and Lloyds Register, but has been working on the Espruino JavaScript interpreter for the last 18 months. In his free time he enjoys making things - from little gadgets to whole cars. -- Micro Python -- Python for microcontrollers Microcontrollers have recently become powerful enough to host high-level scripting languages and run meaningful programs written in them. In this talk we will explore the software and hardware of the Micro Python project, an open source implementation of Python 3 which aims to be as compatible as possible with CPython, whilst still fitting within the RAM and ROM constraints of a microcontroller. Many tricks are employed to put as much as possible within ROM, and to use the least RAM and minimal heap allocations as is feasible. The project was successfully funded via a Kickstarter campaign at the end of 2013, and the hardware is currently being manufactured at Jaltek Systems UK. Damien George is a theoretical physicist who likes to write compilers and build robots in his spare time. Note: Please aim to by 18:15 as the first talk will start at 18:30 prompt.

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Fwd: [OSC-Members] Interesting use for old tech
by Jeremy Bennett 18 Feb '14

18 Feb '14

This came up on the Open Source Consortium mailing list and thought it might appeal to/inspire OSHUG members Jeremy -------- Original Message -------- Subject: [OSC-Members] Interesting use for old tech Date: Thu, 13 Feb 2014 12:22:11 +0000 From: Robert To: osc-members(a)opensourceconsortium.org I came across this: http://www.youtube.com/watch?v=nOMX3deeW6Q First thought; somebody has a lot of time to spare - but interesting and amusing nevertheless. Is that a RPi or an Arduino I see as the controller? Having looked on YouTube I see there's lots more. This: http://www.youtube.com/watch?v=bGSTYvx5c78 is my favourite so far. Robert. -- Tel: +44 (1590) 610184 Cell: +44 (7970) 676050 SkypeID: jeremybennett Twitter: @jeremypbennett Email: jeremy.bennett(a)embecosm.com Web: www.embecosm.com

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