Murata Power Solutions is proud to be a finalist in EDN magazine's 20th Annual Innovation Awards Competition. Our OKL series has been selected from hundreds of nominations to be a finalist for this year's awards. If you can take a few minutes to review the nominations, we would appreciate your vote. And you might find the OKL is a great fit for your point-of-load application.
Instituted in 1990, the Innovation Awards honor the people, products, and technologies that have shaped the industry over the past year. Nominees must have demonstrated innovation that resulted in a significant advance in technology and/or product development during the past 12 months, and the OKL design did just that!
The key design feature of the Okami OKL range of PoL DC/DC converters is the innovative iLGA (inspectable land grid array) package, which features small plated cut-outs (castellations) that allow easy access for visual inspection as well as test probe access to all pads. The iLGA package overcomes problems associated with testing and inspecting conventional LGA packages. It also supports greater reliability in customer PoL applications.
The Massachusetts Data Breach Law that took effect on March 1, 2010 requires you to adequately secure your data. This means hardening your systems, preventing intrusions, and documenting policies.
But besides the fact that you are now required by law to do so, there are many other reasons to have a comprehensive security plan in place. For example, according to the Ponemon Institute, the average data breach costs $6.75 million.
Black Box can help you implement your comprehensive security plan with effective security solutions that aren’t going to break the bank.
The Veri-NAC™ appliance for network access control helps you comply with this new law by enabling you to find and fix network holes, and prevent unauthorized access to confidential citizen records. It also comes with templates for producing security policies for documenting due care and due diligence. Veri-NAC is a plug-and-play, agentless, and non-inline appliance, designed to provide rock-solid security. Best of all, it requires no infrastructure upgrade like some other NAC solutions do. For more information, go to blackbox.com/go/Veri-NAC.
The Massachusetts Data Breach Law that took effect on March 1, 2010 requires you to adequately secure your data. This means hardening your systems, preventing intrusions, and documenting policies.
But besides the fact that you are now required by law to do so, there are many other reasons to have a comprehensive security plan in place. For example, according to the Ponemon Institute, the average data breach costs $6.75 million.
Black Box can help you implement your comprehensive security plan with effective security solutions that aren’t going to break the bank.
The Veri-NAC™ appliance for network access control helps you comply with this new law by enabling you to find and fix network holes, and prevent unauthorized access to confidential citizen records. It also comes with templates for producing security policies for documenting due care and due diligence. Veri-NAC is a plug-and-play, agentless, and non-inline appliance, designed to provide rock-solid security. Best of all, it requires no infrastructure upgrade like some other NAC solutions do. For more information, go to blackbox.com/go/Veri-NAC.
Farnell po raz kolejny weźmie udział w targach Automaticon i w tym roku zaprezentuje produkty sześciu wiodących na rynku producentów: Analog Devices, Fluke, Harwin, Molex, Texas Instruments i Vishay, którzy gościć będą na stoisku H12-J11 w Hali III (dawniej Hala II). Odwiedzający stoisko Farnell będą mieć okazję do spotkania się z przedstawicielami tych producentów, uzyskania porady od specjalistów oraz przetestowania nowych produktów dostępnych na rynku.
EZ-BoardWare - akcesoria do montażu SMT, które redukują koszty oraz upraszczają projekt PCB. Pełna informacja na stronie producenta: www.harwin.com/ez-boardware
Datamate - rodzina złączy o wysokiej niezawodności idealnie nadająca się do aplikacji gdzie odporność na wibracje, wstrząsy, czy wysokie temperatury jest głównym wymogiem. Więcj informaacji na stronie: www.harwin.com/datamate
Złącza M50 - złącza o rastrze 1.27mm typu board-board o wysokiej niezawodności oraz niskim profilu.
Środa, 24 marca – prezentacje Fluke i Analog Devices
Z szerokiej oferty Fluke obejmującej m.in. multimetry cyfrowe przenośne i stacjonarne, testery elektryczne, mierniki cęgowe, kamery termowizyjne, skopometry na stoisku Farnell będzie można zapoznac się z:
Photoelectric sensors consist of an emitter and receiver, the emitter sends out a beam of light for the receiver to sense. With the diffused and retro reflective type of sensors both the emitter and receiver are placed in the same housing and are configured for light to be reflected back to the sensor.
Retro reflective sensors use a target to reflect light back to the sensor and will sense an object that breaks the beam’s path. The diffuse reflective type senses an object when the light beam is reflected back to the sensor. Additional features as well as different form factors will vary from series to series.
We've added a cool new feature on Harwin.com - you can now have your very own MyHarwin! It's at Beta at the moment, and basically it will keep track of the products you have looked at. You can also save elements of your browsing history, if there are parts that you go back to on a regular basis. Future developments will hopefully include tracking your sample requests and profile management, a single logon for all requests and CAD downloads.
I'm hoping that you will find this feature useful - it's probably a feature you use on shopping websites such as Amazon that you use without even realising it! Anyway, do please come and have a play with MyHarwin!
High gain circuits generally require multiple stages of precision amplifiers. However, lower precision components can often be used if provision is made for adjusting offsets and sometimes adjusting gain. Injecting a little current into an input node of an amplifier can be quite effective in correcting for a large offset voltage. The real problem with a large offset voltage is that it is nearly always accompanied with a large temperature coefficient of offset, meaning the offset voltage can change quite a bit as the circuit temperature changes. This change in offset can be quite annoying, but can be caompensated for by monitoring the circuit temperature and recalibrating (readjustaing the offset correction) whenever the temperature changes enough to require it. Another problem with high gain circuits is susceptibility to noise. For this it is necessary to use the correct components and to know how to properly lay out the circuit board for best performance. Signal integrity plays heavily in this.
This all means that the circuit may be more complex than desirable, but the payoff is in a circuit that is very robust in that it can be relied upon to do what you want it to do.
I am working, with others, on an idea that will make such circuit design virtually trivial.
One area of confusion in production safety testing is the dielectric strength test, sometimes known the as dielectric withstand test or “hipot” test.
This test is usually applied between the secondary output and chassis ground and then between the AC connection (primary) and ground / secondary. This test can identify any assembly errors such as a pinched wire.
It is important to ensure to short the line and neutral together during the test, and when making the primary to secondary test, connect the secondary side to chassis. Short the output terminals together if testing a standalone power supply. Failure to do this can result in damage to the power supply.
A routine question is “should the test voltage be AC or DC?” The majority of power supply manufacturers use a DC voltage because the leakage current through the “Y” capacitors can mask another fault.
The “Y” capacitors are identified in a very simplified diagram below are used to reduce EMI and electrical noise.
As can be seen, applying an AC input to chassis hipot test would result in mill-Amps of current flowing through the capacitors
The majority of safety standards allow DC hipot voltages. Instead of applying 1500VAC, one would use the peak voltage of the AC, √2 x 1500 = 2121VDC. Add 10% to reduce the test time from 1 minute to 1 – 2 seconds.
Apply the DC voltage slowly to allow the capacitors to charge up without tripping the current limit of the test equipment. Remember to discharge the capacitors after the test.
On a cold day in Tacoma, thermography shows house-warming, heart-warming results
It was a record cold day in Tacoma, and a bright sun could not ease the chill of the light wind that wrapped itself around the dozen tidy homes of Larabee Terrace.
The cold snap provided the first big test of the heating systems, insulation and construction techniques used by the Habitat for Humanity volunteers and low-income homeowners who built these homes. Conditions were ideal for a quick course in thermography and weatherization. It was a great opportunity for Habitat staff members to learn to use their new Fluke TiR1 thermal imager.
Thermographer, and Sr. Product Manager, Michael Stuart had driven down from Fluke headquarters for the orientation. The Washington State University team, representing the Department of Energy Building America program, was there with their blower door setup. A blower door test used in conjunction with some thermal imagers from Fluke in one of the newly-built homes would reveal any gaps in the way they were built and point the way to greater energy efficiency.
Volunteers and partners
The homes at Larabee terrace step down a west-facing hillside in an old Tacoma neighborhood of smaller homes. It's the latest project of Tacoma Pierce County affiliate of Habitat for Humanity International. Habitat works in partnership with people in need to build and renovate decent, affordable housing. The houses then are sold to those in need at no profit and with no interest charged.
Since 1985, Habitat has built more than 162 homes in Pierce County, providing home ownership opportunities to households making 30 percent to 60 percent of the Area Median Income. And the benefits extend beyond the homeowners and their neighborhoods. The volunteers who devote their time to building the homes enjoy the warm feeling of giving back to their community. Each Habitat family must complete 500 hours of "sweat equity" through work on their and other people's homes or other work that helps the Habitat run. Habitat is a partnership that builds houses together with the families who will live in them.
"Our goal is to try and make these homes more energy-efficient and more affordable to live in," said Gomer Roseman, Site Development Director, Tacoma Pierce County affiliate of Habitat for Humanity International. "If we can reduce the utility bill by $25 a month, somebody who earns $25,000 a year would be very happy about it."
Modest in size (averaging 1500 square feet) and affordably priced, the Larabee Terrace homes are built to save energy. Their heating systems, designed by a retired Boeing engineer, get double duty from an on-demand gas water heater used to warm domestic water and provide under-floor radiant heat. Foam exterior sheathing boosts wall insulation from a standard R20 to R30.
"That shows up in the infrared imaging," said Mike Lubliner, Sr. Building Sciences Specialist for the WSU Extension Energy Program. "You don't see the distinct heat loss normally caused by the studs in the walls." As Stuart demonstrated its use, the imager made other construction details and areas for possible future improvement surprisingly easy to see. The infrared scans revealed the normally expected cooler areas where walls and ceilings come together—and were even sensitive enough to see where sheetrock screws were under the paint.
Infrared reveals opportunities
After a quick thermography introduction, the WSU team set up a blower door in a recently completed home. The door-mounted fan drew air from the structure, reducing the interior pressure and pulling in cold outside air through openings visible and unseen.
Though the house performed well, some fixes were needed. In the imager's scan, some electrical outlets in outside walls took on a cooler blue tint where air infiltration was occurring through the electrical chase. In another area, cool "air fingers" lightly streamed from a ceiling fixture -- evidence that cooler air was coming in through the fixture and cooling off her surface of the ceiling around it. A few areas even showed where a little more attention could have been given to the placement of the fiberglass bat insulation in the upper part of some wall cavities. Roseman said the results will help produce a better, more efficient, Habitat house by indicating where improvements can easily and inexpensively be made during the construction process and afterward.
"Everything that we've seen as a result of this test indicates something we could be doing differently that would give us a better result," said Roseman. "What we've learned today is that we need to provide better sealing around our electrical penetrations in the walls, and we need to pay more attention to the connection at the top plate. Those are things we're going to work on now and try and build a tighter house.
"If we can build a better house for the same price, and it results in a saving for the owner, we've accomplished something. Tools like this allow us to see the hidden movement of air, things that aren't visible to the naked eye—things that enable us to do a better job without spending a lot of money."
According to Lubliner, infrared testing could be even more productive as Habitat moves into rehabilitating existing homes, built without the energy-conscious techniques of today. "I believe there will be more and more focus on existing homes," he said. "I think the infrared technology and blower door technology will get us more low-hanging fruit in the existing sector than they will in new homes."