Author Archives: richard wilson

Raspberry Pi becomes an industrial web server

modberry500A Polish start-up company is claiming to have created the first industrial computer based on the new Raspberry Pi Compute Module.

Techbase, said the device which it has dubbed ModBerry is designed to be used in automation and installation markets providing multi-level user access cloud management.

It designed around the Raspberry Pi Compute Module’s 700 MHz Broadcom processor with 512 MB of RAM and 4GB NAND flash storage.

Its interfaces include RS 485/232 serial ports, CAN and very economical 1-Wire buses, all of which are widely used in automation industry.

There are Ethernet, USB and HDMI ports and wireless communication, such as Wi-Fi, LTE/3G/GPRS cellular modems or Bluetooth technology.

Bartosz Bielawski, marketing manager at Techbase said he believes the Raspberry Pi is here to stay “as a new standard in embedded computing industry”.

The device is also backwards compatible with the original Raspberry Pi board.

It uses Raspberry Pi’s supports free Raspbian operating system, based on Debian GNU/Linux.

The company has also developed its own software specifically for automation and installation markets, which includes iMod, iModCloud and iModWizard.

Apart from the basic installation management like software updates or device grouping and aforementioned access control, iModCloud sports numerous other functions like data visualization capabilities – through data tables or charts, maps, with GPS-enabled devices marked on them, file management and a robust notification, custom-based actions system.

 

Cambridge team make superconductor ‘golf ball’

cambridgeResearch led by University of Cambridge engineers claim to have made a breakthrough in superconductor science by harnessing the equivalent of three tonnes of force inside a golf ball-sized sample of material that is normally as brittle as fine china.

The research team said what is significant about this discovery is that it demonstrates the potential of high-temperature superconductors for applications in a range of fields, including flywheels for energy storage, ‘magnetic separators’, which can be used in mineral refinement and pollution control, and in high-speed levitating monorail trains.

The research team managed to ‘trap’ a magnetic field with a strength of 17.6 Tesla in a high temperature gadolinium barium copper oxide (GdBCO) superconductor, beating the previous record by 0.4 Tesla.

According to Professor David Cardwell of Cambridge’s Department of Engineering, who led the research, in collaboration with Boeing and the National High Field Magnet Laboratory at the Florida State University: “There are real potential gains to be had with even small increases in field.”

“This work could herald the arrival of superconductors in real-world applications,” said Professor Cardwell. “In order to see bulk superconductors applied for everyday use, we need large grains of superconducting material with the required properties that can be manufactured by relatively standard processes.”

A number of niche applications are currently being developed by the Cambridge team and its collaborators, and it is anticipated that widespread commercial applications for superconductors could be seen within the next five years.

Superconductors can carry currents that are typically 100 times greater than copper, which gives them considerable performance advantages over conventional conductors and permanent magnets.

Superconductors are materials that carry electrical current with little or no resistance when cooled below a certain temperature.

While conventional superconductors need to be cooled close to absolute zero (zero degrees on the Kelvin scale, or –273 °C) before they superconduct, high temperature superconductors do so above the boiling point of liquid nitrogen (–196 °C), which makes them relatively easy to cool and cheaper to operate.

Superconductors are currently used in scientific and medical applications, such as MRI scanners, and in the future could be used to protect the national grid and increase energy efficiency, due to the amount of electrical current they can carry without losing energy.

The new record was achieved using 25 mm diameter samples of GdBCO high temperature superconductor fabricated in the form of a large, single grain using an established melt processing method and reinforced using a relatively simple technique.

The previous record of 17.2 Tesla, set in 2003 by a team led by Professor Masato Murakami from the Shibaura Institute of Technology in Japan, used a highly specialised type of superconductor of a similar, but subtly different, composition and structure.

The research was funded by The Boeing Company and by the UK Engineering and Physical Sciences Research Council (EPSRC). The National High Magnetic Field Laboratory, where the measurements were performed, is funded the National Science Foundation and the State of Florida.

UK bids to create IoT standard

Pilgrim Beart

Pilgrim Beart

The UK government is funding a consortium of more than 40 UK-based technology companies to help them take commercial advantage of the market for internet-based devices, the so-called internet of things (IoT).

The initiative which is funded by the Technology Strategy Board has at its centre the creation of a new open IoT specification. Called HyperCat, it is designed to support software interoperability, allowing applications to search for data and resources are available on a specific data hub, or across the Internet.

It is the result of 12 months work and with £6.4m funding involving companies such as ARM, BT and IBM with UK start-ups and universities.

“HyperCat has been designed to move us from the ‘internet of silos’ to the internet of things,” said Pilgrim Beart, CEO of IoT start-up 1248.

“Previously, applications were vertically-integrated, working only with specific services, which confines data to narrow vertical silos. HyperCat enables apps to discover data across all services, freeing machines from the human programmer bottleneck and allowing a many-to-many relationship to develop, which is the key to IoT.”

The government hopes this initiative and investment will help give UK companies a leadership position in IoT and in turn support the UK economy by creating new jobs and attracting foreign investment to the UK.

The project has created clusters of IoT start-ups and universities each focussed on a particular application. Each cluster used the HyperCat specification to create interoperability within their cluster and then between clusters.

“This will drive commercial use of the hubs and lowers the barrier to participation, particularly for SMEs,” said John Davies, Head of Semantic Technology at BT.

“While there is still the need for applications and services to agree on standard ways to describe data – so called ontologies – HyperCat offers a common approach to describing the information held on data hubs, thereby allowing people to find data relevant to their specific needs more quickly and easily,” said Davies.

 

 

Linear retunes low noise fractional-N PLL

Linear Tech Linear Technology has introduced a fractional-N phase-locked loop (PLL) with 6GHz-plus integrated voltage-controlled oscillator (VCO).

The LTC6948 has a fourth order delta-sigma modulator that employs noise-shaping techniques to minimise noise contribution without creating the fractionalisation spurs typically found with fractional-N PLLs.

The chip is a fractional-N PLL with integer-N spurious performance.

The benefits of fractionalisation are frequency agility and improved phase noise.

The device has a -274dBc/Hz normalised 1/f noise specification that does not affect its -226dBc/Hz normalised in-band phase noise floor.

Typical applications include wireless communications using complex modulation schemes, communications systems that employ long burst durations and Doppler radar.

There are four versions of the LTC6948, each offering a different VCO frequency band with the fastest option delivering up to 6.39GHz.

The VCO output divider can be programmed from 1 through 6 to cover a wide range of frequencies down to 373MHz. V  

The FracNWizard simulation and design tool is available for free download.

All versions of the LTC6948 are specified over the full operating junction temperature range from -40°C to 105°C. The products are available in a 4mm x 5mm, 28-lead plastic QFN package.

 

ST’s audio chip goes from soft to LOUD

STSTMicroelectronics’ latest audio processor has been designed with a wide dynamic range which allows digital signals with a dynamic range exceeding 130dB to be generated without the need for high-performance ADCs (analogue-to-digital converters).

The STA311B embeds eight audio-processing channels with up to 10 independent user-selectable bi-quadratic filters per channel, input and output mixing capabilities with multi-band dynamic range compression.

There is also auto-detection of input sampling frequency, input and output RMS metering, and pulse width modulation technology.

The input/output RMS metering function is designed to deliver an increased level of safety to the final product without any additional hardware cost.

This allows the application to suppress unwanted energy surges that could potentially damage the speakers.

The STA311B’s pop-free circuitry also enables a seamless start-up, eliminating unwanted noise due to the bridge charge sequence in both Single-End and Bridge-Tied Load configurations.

The device is available in a 8.0×8.0×0.9mm VFQFPN package,

The STA311B is supported by ST’s free APWorkbench software development tool.

 

Microchip adds data encryption to PIC microcontrollers

microchipMicrochip has tuned its eXtreme Low Power (XLP) PIC microcontroller range with increased data protection capabilities.

The MCUs integrate a hardware crypto engine, a Random Number Generator (RNG) and One-Time-Programmable (OTP) key storage  or protecting data in embedded applications.

Several security features are integrated into the PIC24F “GB2” family, to protect embedded data. The fully featured hardware crypto engine, supporting the AES, DES and 3DES standards, reduces software overhead, lowers power consumption and enables faster throughput.

The PIC24F “GB2” devices offer up to 128kbyte flash and 8kbyte RAM in small 28- or 44-pin packages, for battery-operated or portable applications.

A Random Number Generator creates random keys for data encryption, decryption and authentication, to provide a higher level of security.
For additional protection, the One-Time-Programmable (OTP) key storage prevents the encryption key from being read or overwritten.

These security features increase the integrity of embedded data without sacrificing power consumption. With XLP technology, the “GB2” family achieves 180 µA/MHz Run currents and 18 nA Sleep currents, for very long battery life in portable applications.

The MCUs also integrate USB for device or host connections, as well as a UART with ISO7816 support, which is intended for smartcard applications.  

Product variants are available with USB (PIC24FJXXXGB2XX) and without USB (PIC24FJXXXGA2XX). The PIC24FJ128GB204, PIC24FJ64GB204, PIC24FJ128GA204 and PIC24FJ64GA204 are offered in 44-pin TQFP and QFN packages. The PIC24FJ128GB202, PIC24FJ64GB202, PIC24FJ128GA202 and PIC24FJ64GA202 are available in 28-pin SOIC, SSOP, SPDIP and QFN packages. All of these new MCUs are available today for sampling and volume production.

R&S tester sets up vehicle-to-vehicle radio links

Rohde and SchwarzRohde & Schwarz has introduced a radio conformance test system for standard-compliant testing of components for vehicle-to-vehicle applications and intelligent transport systems (ITS).

The TS-ITS100 automated test system for standard-compliant testing of RF components in line with IEEE 802.11p. These components are used for vehicle-to-vehicle communications and intelligent transport systems (ITS).

Using sequencer software developed especially for RF conformance tests, the test system makes it possible to verify compliance with regional standards such as ETSI EN 302 571 in the EU, IEEE 802.11-2012 in the USA or the ARIB standard in Japan.

These standards ensure that 802.11p user equipment works smoothly within the available spectrum and does not interfere with adjacent services in the spectrum.

Taking fading into consideration, the TS-ITS100 also covers specific performance tests as defined by the Car 2 Car Communication Consortium (C2C-CC), which includes Rohde & Schwarz.


Cambridge start-up connects horses to IoT

Will Bradley, managing director of Gmax

Will Bradley, managing director of Gmax

Cambridge Design Partnership has created a start-up company aimed at commercialising wearable electronic devices, for horse-racing.

Gmax Technology will manufacture a range of connected body monitors aimed at the horse-racing sports market.

The 5 year old start-up is targeting a niche high value market for sports monitors. It has been supported by Technology Strategy Board SMART awards and Knowledge Transfer Partnership grants.

One of its first products, called Vetcheck, is a handheld equine ECG and is currently in use at Dubai International Endurance City.

The firm’s flagship product, dubbed the Trackwork, is used to gather live performance data from groups of training horses, allowing owners and trainers to monitor fitness during training anywhere in the world.

It is currently in use in the UK by the Coral Champions Club allowing over 4000 of their members to follow the training of their horses over the internet.

gmexThe spin-out came from Cambridge Design Partnership’s expertise in designing medical diagnostic devices and products.

“The multidisciplinary approach of the team has allowed us to create products that combine novel sensors with wireless communications, which deliver valuable insights into the physiological effects of training,” said Will Bradley, managing director of Gmax.

“These innovative solutions are already in use by the horse racing industry and we expect similar products to be developed for a variety of markets such as human healthcare and sports training.”

 

 

US conflict minerals legislation has no exceptions

Howard Venning

Howard Venning

Aspen Electronics, managing director Howard Venning emphasises the need for suppliers to demonstrate compliance with European and US government legislation.

By far the biggest change has been the UK’s integration into the European Union. Membership has meant that today the UK must agree with, and implement, hundreds of EU directives and ensure compliance.

It all started with CE marking, which encompassed EMC, LVD, RTTE, WEEE, REACH & RoSH 2, plus the Batteries Directive, to name just a few.

All the above legislation comes at considerable cost to both large and small manufacturers as they work to prove understanding and compliance. An online search will reveal literally hundreds of manufacturers, distributors and stockists own interpretations of the regulations and statements of compliance.

For each of these pages someone somewhere had to spend time and effort in understanding the implication of the regulations and then writing a statement to provide an answer to each and every customer who asked the question. In turn these customers are asked by their customers to prove compliance and the cycle starts all over again.

Anyone who has been in the industry for 30 years plus will know that today’s equipment is so much better than it used to be – but still end users must have 100% confidence that the products they have purchased are safe. All this costs money and we’re all paying for it.

With all this legislation we have yet to reach that point in the development of standards where someone stands up and says – “you know what, I think that is as good as it will ever get”. If we did get to that point we would all breathe a sigh of relief as the prospect of yet another course or presentation diminishes.

Dealing with US legislation is far more onerous. US export controls have been in place for many years. The EAR regulations have always focussed on making sure US products were not shipped direct to or indirectly to undesirable countries, customer or end uses.

Whilst the countries, customers and end uses have changes, the basics have not and anyone importing products from the USA should know what is required.

More recently the USA introduced the ITAR regulations which applied in parallel to the EAR regulations and therefore became far more demanding. As the implications of non-compliance came to the fore, organisations, typically the major defence contractors introduced their own compliance regimes to ensure they could demonstrate they had everything under control.

Our experience has revealed marked differences in the way ITAR regulations are interpreted by both manufacturers and customers, again adding to the cost of compliance.

With any of the previously mentioned EU directives there are numerous exclusions. For example, the WEEE directive has a de minimis clause that exempts “small producers” (those that produce less than 5 tonnes of electrical waste per year) from joining a Producer Compliance Scheme.

Another example is the use of lead in other electrical and electronic applications as defined in the RoHS regulations. Whilst the general idea is to prohibit the use of lead, certain applications are exempt and a small amount of lead is permitted in, for example, certain types of solder.

However, the latest piece of legislation to arrive from the US has no exceptions or exclusions. This possibly unique piece of legislation is the requirement to comply with the ‘Frank-Dodd’ act, otherwise known as the Conflict Minerals Act.

The conflict minerals act has no de minimis clause and therefore no matter how small you are as an organisation, or your “use” is of any of the minerals controlled under the act, you must comply. This is almost an impossible task that will certainly demand many hours of research, emails, letters etc. as you keep your customer, and their customer and their customer, happy as the effects of this legislation goes up and down the supply chain.

In a recent example the US parent of a UK company sent us an excel spreadsheet to complete that details all the products from all the manufacturers we had supplied over the last few years.

This we completed with the standard statement that we were a distributor and as such were not in a position to supply all the information required. We received a short email thanking us for our submission, but it pointed out that “we have detected that the list of smelters has not been provided.” At that point, which just happened to be 5.00pm on a Friday afternoon, I needed to make a serious management decision.

What was more important, trying to work out just how I was going to get the names of the smelters used by the supplier of the gold…. who supplied the gold dealer…. who supplied the gold distributor…. who supplied the plating shop…. that plated the centre pin of the BNC connector…. produced by the connector manufacturer…. who supplied the distributor…. who supplied the manufacturer of the 50ohm 25 watt load, (which was just one of the 28 products on the list), or find a supplier that had an arrangement with the manufacturer of a complex product that demanded just as much time and effort to ensure quality was maintained throughout the supply chain bringing the customer a repeatable product ensuring the purchasing experience met all the criteria expected…. the pub won !

 

TI adds PMBus control interface to buck converters

TPS544B20 Texas Instruments has introduced its first 18V, 20A and 30A synchronous DC/DC buck converters with a PMBus digital power control interface.

The SWIFT TPS544B20 and TPS544C20 converters also have integrated MOSFETs.

The reference voltage accuracy is specified at 0.5% and there is differential remote voltage sensing for powering processor-based SoCs.

Selectable D-CAP or D-CAP2 adaptive on-time control mode is designed to provide a fast load transient response and reduces external component count.

The PMBus is used for programming, real-time monitoring of the output voltage, current and external temperature and fault reporting.

For PMBus applications without output voltage, current and board temperature telemetry, TI offers the 12A SWIFT TPS53915 buck converter.