Showing posts with label electronics projects. Show all posts
Showing posts with label electronics projects. Show all posts

Saturday, 8 September 2012

Raspberry Pi, British ingenuity

The UK-made Raspberry Pi's have been assembled at Sony UK Technology's factory in Pencoed, South Wales. About 30 jobs will be created as a result of the deal which will mean most of the Pis being distributed by Premier Farnell will be made in Britain. UK production of the Raspberry Pi started in mid-August and began being delivered to customers this week. Pi boards made in the Welsh plant have "Made in the UK" printed next to the power jack.
In a blogpost, Raspberry Pi community director Liz Upton said it chose Chinese manufacturers at the start of the project because it could find not find a UK manufacturer that could make them cheaply enough or was willing to take a risk on the bare-bones computer. "There was just no way to make the Raspberry Pi in the UK and keep the price at $25 (£16) for the Model A... and $35 (£22) for the Model B," she wrote. Ms Upton said it had taken six months to get to the point of manufacturing Raspberry Pi computers in the UK. The news about manufacture comes as the design of the machine gets an overhaul. The changes are based around suggestions from Pi owners and will mean tweaks to the way the device works and fix some minor bugs.
The first batch of 10,000 boards was manufactured in Taiwan and China, rather than in the UK. This is in part because import duty is payable on individual components but not on finished products. Chinese manufacturers also quoted a lead time of four weeks, compared to 12 weeks in the UK. Savings can be reinvested in the Foundation's research and development activities. Shipping delays for the first batch were announced in March 2012, as the result of installation of an incorrect Ethernet port. But the Foundation expects that manufacturing quantities of future batches can be increased with little difficulty if required. "We have ensured we can get them [the Ethernet connectors with magnetics] in large numbers and Premier Farnell and RS Components [the two distributors] have been fantastic at helping to source components," Upton said.
Initial sales commenced 29 February 2012 at 06:00 UTC;. At the same time, it was announced that the Model A, originally to have had 128 MB of RAM, was to be upgraded to 256 MB before release. The Foundation's website also announced "Six years after the project's inception, we're nearly at the end of our first run of development – although it's just the beginning of the Raspberry Pi story." The two licensed stores selling them within the United Kingdom, Premier Farnell and RS Components, had their websites stalled by heavy web traffic immediately after the launch. At one point the webmaster pleaded, "Guys – can you please stop hitting F5 on our website quite so often? You're bringing the server to its knees." Although as yet unconfirmed, reports suggest that there are over two million expressions of interest or pre-orders. The official Raspberry Pi Twitter account reported that Premier Farnell sold out within a few minutes of the initial launch, while RS Components took over 100,000 pre orders on day one. Manufacturers were reported in March 2012 to be taking a "healthy number" of pre-orders.

On 16 April 2012 reports started to appear from the first buyers who had received their Raspberry Pi. As of 22 May 2012 over 20,000 units have been shipped. On 16 July 2012 it was announced that 4000 units were being manufactured per day, allowing Raspberry Pis to be bought in bulk. On September 5th the Raspberry Pi Foundation announced a second revision of the Model B Raspberry Pi On 6 September 2012 it was announced that going forward the bulk of Raspberry Pi units would be manufactured in the UK, at Sony's manufacturing facility in Pencoed, Wales. The foundation estimates the plant will produce 30,000 units per month at Sony's Welsh plant, and will create about 30 new jobs

The Raspberry Pi is a cheap bit of english tech which is a great introduction to programming and get young people involved. There are of course a few tutorials which might interest hobbyists like myself in to projects like the media center or other complexes projects.
In the early 1980s, the UK founded a sizable cottage industry designing and making computers on the back of the BBC Micro and later the Acorn Archimedes, the latter being made by Norwich Computer Services. As these proprietary but hugely influential designs and their creators faded, in the 1990s came more standard UK-designed PCs from ICL and Apricot, eventually taken over by Fujitsu and Mitsubishi respectively. One was closed and the other continued as a services part of a Japanese multi-national, its Britishness hollowed out. Apart from a few niches such as Psion, the native British computer industry was dead and everyone moved on to software. Now, unexpectedly from a small office in Cambridge, the industry is back in a smaller but perhaps eventually equally influential form.


                                   

Sunday, 15 July 2012

The wonderful world of Programable chips

When I first got into electronics I was making projects with simple circuits burglar alarms and music amplifiers. I could see the potential of digital electronics actually learning the basics with Boolean algebra and how to make a digital lock device. I soon made the choice to music and electronics and never looked back.
Digital electronics was a secret interest of mine I wanted to go back and learn about programable chips and what I could do to incorporate them into some gadget ideas.

EPROM's (erasable programmable read only memory)  chips are memory chip that retains its data when its supply is switch is off. Meaning it is non volatile. It is an array of floating gate transistor individually programmed by an electronic device that supplies higher voltages than those normally used in Digital circuits.
A programmed EPROM retains its data for a minimum of ten to twenty years, with many still retaining data after 35 or more years, and can be read an unlimited number of times. The erasing window must be kept covered with an opaque label to prevent accidental erasure by the UV found in sunlight or camera flashes. Old PC BIOS chips were often EPROMs, and the erasing window was often covered with an adhesive label containing the BIOS publisher's name, the BIOS revision, and a copyright notice. Often this label was foil-backed to ensure its opacity to UV.


Flash forward a few years and you have PIC Programable Interface controller. They are a family of modified Harvard architecture micro-controllers made by microchip technology.
PICs are popular with both industrial developers and hobbyist alike. they are widely available have a extensive collection of application notes, and are relatively cheap. The original PIC was built to be used with General instrument's new 16 bit Central Processing Unit. The PIC used simple microcode stored in a Read only Memory to perform tasks,
Devices called programmers are used to get program cod into the target PICs. There are many programmers for PIC micro-controllers ranging from the simple design of in circuit design programming, which allows direct downloading of code from host computer. Or complex programmers that can sense the device at several voltages., many of which have been preprograms themselves.

I often seen these devices in the back of electronics magazines for making circuits such as voice synthesizer, universal Infrared Reader. or counter / timer. Much of the projects I didn't have much interest in. They also were basically chips that need a circuit to be built for them. I much prefer the kit form projects as I didn't want to order a shopping list of items but rather have the whole project sent to me so I could construct it my self. Next comes the Arduino it is a popular open source single board microcomputer, descendant of the open source wiring platform. It is designed to make the process of using electronics in a multidisciplinary projects more accessible.
In 2005, in IvreaItaly (the site of the computer company Olivetti), a project was initiated to make a device for controlling student-built interaction design projects with less expense than with other prototyping systems available at the time. As of May 2011, more than 300,000 Arduino units were "in the wild".Founders Massimo Banzi and David Cuartielles named the project after Arduin of Ivrea, the main historical character of the town.[8] "Arduino" is also an Italian masculine first name, meaning "strong friend"
The Arduino project is a fork of the open-source Wiring Platform. Colombian artist and programmer Hernando Barragán created Wiring as a master's thesis at the Interaction Design Institute Ivrea under the supervision of Massimo Banzi and Casey Reas. Wiring was based on Processing and its integrated development environment which had been created by Casey Reas and Ben Fry.

For me Arduinos are a great way to start at entry level programing from simple projects to more complex ones. There are many project you can start with like a EMF detector for ghostly apparitions. I like the wireless applications for possible bluetooth connections for you Iphone or computer control. I am still reading up on these fascinating projects and wondering about copying a circuit for my next electronics project. Until then why not look into the wonderful world of the Arduino micro computer.