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22 May 2015

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From a wide offer of solders from company Stannol, it´s easy to choose the most suitable type meeting your demands.

The solder matters, it is an undisputable fact confirmed daily in a development and production of electronics. Hand soldering of prototypes, automated machine soldering, soldering of small SMT components or on the in contrast soldering of big joints of massive connectors, rework, … all that wants a solder optimized for a given usage.
As we know, features of a solder wire are determined by an alloy itself (PbSn xx, SnAg xx, …) but in a considerable extent also a flux used. A flux has a big influence mainly on a soldering process, spreading of solder (often even on partially oxidized surfaces), spitting at hand soldering, etc. That´s why despite of often similar specification (according to datasheets), it is still possible to see considerable differences among solders after all. Besides the most important parameters like composition of alloy and flux properties, some features (like spitting and solder spreading) can be really evaluated only at working with a given type.

Over 130-years experience of German company Stannol give a guarantee, that in their portfolio can be found a type suitable even for your work. In a Stannol catalogue can be found favourite “universal” types suitable for the most types of works in electronics and electrotechnics (for example HS10, HF32, Kristall 400) but also specialized types suitable even for soldering of poorly solderable surfaces.

The principle of Stannol products marking is in it, that they are marked by a flux type (HS10, HF32,…) and by an alloy used (Snxx, SnPb,…). A solder wire is available in many combinations flux / alloy , that´s why it is suitable look at their properties in detail and then to choose a suitable type. On stock we keep the most favorite types with fluxes HS10, HF32 or 2630, suitable for majority of joints.

  • HS10 – no-clean flux containing halides, based on a natural resin (colophony). Outstanding properties regarding spreading and electrically safe residues. The flux is non-corrosive on non-ferrous materials. The most popular type for electronic industry.
  • HF32 no-clean halide-free flux with an activated resin (colophony). Outstanding combination of high activity, good wetting properties and small amount of residues. Residues are transparent, hard, dry and non-corrosive. Very suitable even for SMT components, high reliability of joints. Special version HF32 SMD features even lower flux content and leaves minimum residues, that´s why it´s very suitable even for rework, manual adding of components to PCB and similar.
  • 2630 – the most active no-clean flux containing halides. Usable even on places where HS10 is not sufficient. Ideal for surfaces with poor solderability as well as for soldering of bigger joints (thicker copper wires etc.).

Upon request, we´re able to provide you with another types from Stannol production, for example Kristall 400 – no-clean halide-free flux with synthetic resins, with transparent residues and good activity, able to provide excellent soldering results. In general, fluxes, which contain halides are more active and at soldering they feature better wetting. On the other side halide-free fluxes are more safe in respect of possible corrosion around a solder joint and modern fluxes already have very good wetting properties. Normally, neither halide fluxes marked as “no-clean” don´t cause corrosion around a solder joint but at certain circumstances (for example devices intended for very humid conditions) it may be necessary to wash soldered joints from flux residues.

Detailed information will provide you the attached table as well as Stannol catalogue, overview of Stannol soldering materials, overview of Stannol solder wires and overview of soldering fluxes standards.


Find the right solder for you – [Link]

21 May 2015

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Top-class thermal imaging cameras Flir E6 and E60 with a high resolution, dual displaying and WiFi connection are now available for schools with a 50% discount!

Thermal imaging cameras find their place in many industrial segments also because they´re still more affordable. At the same time, top-class full-featured IR cameras are available in a midle price level. This is also a case of FLIR E6 and E60 cameras.

Flir E6
Advanced camera with a big 3″ display, 160×120 px (IR) + 640×480 px (camera for a visible spectrum). Possibility to combine images from infra and visible spectrum (“MSX”) , wide setting possibilities and 0,06´C sensitivity. Spot metering and area metering make possible fault identification easier.

Flir E60
Top-class camera with a WiFi and Bluetooth connectivity (video and pictures). High resolution (320x240px= 76000 pixels) together with a built-in 3,1Mpx camera for a visible spectrum enable to detect sources of faults very exactly. Spot metering, digital zoom, picture-in-picture and other functions make this camera truly versatile. A real bonus are (optional) exchangeable lenses (wide, 2x tele) as well as possibility of manual focus control enabling to make sharp images even at small distances. Big 3,5″ LCD with a touch panel also contributes to easy and intuitive control. Maximum measurable temperature of 650´C make the camera usable for a whole range of demanding industrial measurements.

Moreover, company FLIR, the leader in a segment of thermal cameras comes with exceptional offer for a support of education. Special offer applies to E6 and E60 FLIR thermal cameras. For exceptional price with a 50% discount you´ll get not only a camera itself, but also a complete “Educational kit” containing:

  • FLIR camera
  • Educational DVD
  • Building guide
  • Industrial guide
  • R&D guide

 Flir E6 kit is vailable for 1247.50 Euro and the Flir E60 kit for 3747.50 Euro.

 


Would you also like to locate a fault within few seconds? – [Link]

20 May 2015

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Top-class component should be equipped with a top class documentation. That´s also a case of many AC/DC and DC/DC modules series from Traco Power.

Demands of various application also vary. While somewhere it´s enough to know, that a given power supply will give us „some DC12V/1A“ or that a given „LED shines green and withstands 20mA“, in majority of cases we naturally need much more about a given component. Somewhere at the end of this chart are applications, where we need to know literally every parameter, including commonly non-mentioned parameters and graphs from a real measurement.

From this point of view, Swiss company Traco Power is really helpful at development and at selecting given AC/DC or DC/DC module, as all power modules are equipped with quality documentation in a form of detailed datasheets, certificates, 3D drawings and similar. Masterpiece – the application notes are available for several „high performance“ modules like for example TEN8WI module.

TEN8xxxxWI is the 8W DC/DC isolating module with a high energy density, enhanced range of operating temperatures and a wide input voltage range( 4:1). Besides a common documentation, there´s also available the TEN8WI application note, where we can find all important information for successful usage even in critical applications (EN50155-railways), including EMC characteristics, thermal consideration, recommended PCB layout and other.

For applications, where we don´t require that wide input voltage range, the standard TEN8 version (non- „WI“) is intended. In the TEN8 and TEN8WI families can be found a large amount of types with various input voltages (input 9-18VDC, 18-36, 36-75 or 9-36, 18-75 at the WI series) and 3.3 to 15Vdc output, including symmetrical ones (for example +-12V). On stock we keep a few versions, all other versions we´re able to supply you in a short leadtime.

Detailed information will provide you datasheets at particular types, as well as above-mentioned TEN8WI application note, TEN8WI certificate, TEN8WI-3D drawing and the TEN8 series filter design.


Aren’t you very satisfied with “empty” datasheets? – [Link]

19 May 2015

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±2% accuracy in a whole range of relative humidity measurement – that´s just one of several improvements brought by the third generation of miniature calibrated sensors from company Sensirion.

Even the actual series like SHT1x and SHT2x belong to a top in this segment. Forthcoming series SHT3x (SHT30, SHT31 and soon also SHT35) addresses mainly those of you, requiring maximum accuracy even in limit values (humidity below 10% and above 90%), miniature dimensions and ultra low power consumption. So a main difference of a new SHT31 compared to SHT21 is, that a typical +-2% is maintained in a whole range. Together with a precise temperature measurement in element we still have a possibility to simply compute a dew point, what´s one of the key parameters for ventilation control (HVAC, heat recovery). If it´s “only” necessary to guide a humidity not to exceed certain level, then you´ll probably also use the output „Alert“ pin, able to start interrupt in a host MCU for instance or directly control further devices. Output of the SHT3x sensor is the linearized value, which can be easily transformed to a final value (%RH, °C).SHT31 is available in 2 versions – SHT31-DIS-B with a digital output via well-proven I2C bus (2 selectable addresses) and also in a version SHT31-ARP-B with a linearized analogue (proportional) output. That´s why SHT31-ARP-B is an interesting alternative for direct processing in analogue circuits, as it contains 2 independent outputs with output voltage of 10-90% Vdd, responding to 0-100%RH and -45 to +130°C temperature. Digital output version also features wide possibilities of setting regarding measurement frequency, communication speed and other parameters.

Detailed information will provide you SHT3x-ARP and SHT3x-DIS datasheets. Comparison of particular series will provide you the „Sensirion_Humidity” flyer.


Even the humidity & temperature sensors can be “3G” – [Link]


18 May 2015

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Besides heavenly blue, now the Hammond 1455 aluminium enclosures are also available as hellish red.

There are several possibilities how to make a device exquisite – and one of them is certainly a unique design. From this point of view, enclosures with red-anodized surface are simply eye-catching. Elegant red surface (matt) makes a luxury impression and it´s obvious at the first sight, that we don´t deal with a simple color painting but a high-grade hard coating (anodized).New red surface finish is offered by Hammond for many 1455, where can be found enclosures of various sizes, with a length of 6 to 22 cm. 1455 series enclosures are available with plastic or metal end panels, while plastic end panels are also available in attractive color versions from polycarbonate.

This novelty is so far available upon order, with a short leadtime. Detailed information can be found in datasheets at particular enclosures below this article.


HAMMOND 1455 aluminium enclosures now also in attractive red version – [Link]

14 May 2015

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No need to consider temperature resistance of Multimec 3 and Unimec switches anymore.

Company MEC, Dutch producer of top-class push-button switches Multimec, Unimec and others comes with good news for developers and producers of electronics.

Well-known reliable push-buttons were in majority of cases available in so called standard version (L6, -40…+115°C) and in a high-temperature version (H9, -40…+160°C). From now on, all types will be gradually available only in a „high temperature“ version, which can be identified by „H9“marking in suffix. This applies to Multimec 3 and Unimec series (series Multimec 5 is already from the beginning only available in a high-temperature version).

The main „good news“ is, that these high-temperature types will be available for practically identical prices like standard types. That´s why, even in applications where you wouldn´t necessarily need that high thermal resistance, you can use this high-temp version and profit from unchanged price and potentially wider possibilities of usage of your product.

The most suitable type for you application can be easily found in the MEC catalogue (11MB).


High-temperature versions of MEC switches now for the price of standard versions – [Link]

13 May 2015

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How to coordinate busy working schedule and also find time to attend the exhibition? It’s simple, just one click...

For this exhibition season, we have prepared unconventional news. You don’t have to travel to attend the exhibition to learn about news in electro-technical business no more. All of that can be done from the comfort of your office. All you need to do is just one click and we will transfer you to virtual expo to SOS stand.

You will soon learn more about what we have prepared for you on our web and facebook profile… You can already schedule a date for the virtual exhibition in your diary.

Virtual stand on “virtual expo” will be available since 
 25.5.2015

Enjoy the exhibition from the comfort of your office… – [Link]

11 May 2015

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Pleasant actuation characteristics and reliable features of a push button switch Marquardt series 1840 make it attractive for all applications where you require control by a push.

Classic push-button switches are favorite for many decades, maybe also because they´re well known already from the beginnings of electronics. Probably, a nostalgia is not the only reason making them popular, but mainly an easy control, when even an unacquainted person knows, that it´s something “what has to be pushed” to change a status of an electric device.

Exactly a term “to change a status” is important, because at these switches it´s not possible (or not easily visible), whether it´s switched on or off. Though it´s true, that the majority of such switches is a little bit pushed down (lowered) in a switched on status, but the difference is often small. That´s why these switches are not suitable for applications, where from safety reasons it´s necessary to know tha status of the switch before connecting to a mains line.

Marquardt 1840 series switches are available as single-pole switches – 1841 (momentary, SPST), two-pole switches – 1842 and single-pole changeover switches – 1843 (SPDT). Directly from our stock we offer you momentary switches ) 1841.1201 (SPNO) and 1841.1301 (SPNC).
Series 1840 (SPNC) belongs to a top in this segment and offers a really pleasant control and a quality switching system with a mechanical endurance of min. 100 000 cycles. 6A/ 250V is far sufficient for many applications and assembly is simple – by means of an M12 nut supplied. An interesting supplement is also a neoprene cap integrated with an M12 nut, enabling to gain a considerable resistance to water and dust. Also available are 2-pole versions – 1842 and also versions functioning as a push-button (momentary).

There are 2 nuts supplied. One is “regular” – hexagonal and the other one is a round type intended to be used as a top cover on a front panel. Further detailed information will provide you the Marquardt 1840 datasheet.

Marquardt 1841 – above standard classics – [Link]

5 May 2015

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Switching of three-phase motors or a realization of a sophisticated installation is a breeze with industrial relays Finder.

As we know, a relay is a very versatile component, able to realize also various “sequential” circuits, when for example by switching one relay we´ll switch on a target device and at the same time we´ll enable (or disable) switching of another relay. In these case, it´s an often demand for a relay to have a sufficient number of poles. Majority of such “logic” circuits can be realized even with a common 1-2 pole relays, but it´s not always economical and it also brings another costs for solution of supplying and protection of logic circuits.

Industrial relays Finder series „55“ and „60“ are suitable for a construction of such more complex circuits or for switching of three phase devices.

  • Finder 55 – miniature industrial relay for a PCB or for socket, 2-4 poles, 7-10A (switching current up to 20A), 250/400VAC,
  • Finder 60 – a more robust industrial relay for a socket, 2-3 poles, 10A (switching current up to 20A), 250/400VAC,

Read the rest of this entry »

30 Apr 2015

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And it can be added that also simply and cheaply. MCP73831 from company Microchip is „all-in-one“ solution for charging a single Li-ion/Li-Po cell.

Li-Ion a Li-Polymer cells are becoming a No.1 choice for many applications, where they persuade by high energy density, low weight, low self-discharge and for majority of applications also by their favorable flat shape (Li-Po). Their price is also affordable (in regard to their properties) and so there´s usually only one “difficulty” – to solve charging, or more exactly – overall management of these cells. Basic principles were highlighted to you in our article “Try the most favourite types of batteries”. To reach a maximum cell lifetime, it´s also advisable to use initial (preconditioning) slow charging and also important is a proper charging termination as well as repeated recharging after reaching a certain degree of discharge.It´s obvious, that to construct such a circuit from discrete components would be possible, but impractical, bulky and expensive. That´s why there are various charging controllers on the market and in many cases a single chip solution is an ideal solution. This is also a case of MCP73831 chip – a fully integrated linear charging controller. If you use only a single cell and maximum charging current of 500mA is sufficient for you, then MCP73831 will meet all requirements for a quality and safe recharging solution. MCP73831 has integrated output (FET) transistor, current sensing and reverse discharge protection.

Charging current can be easily adjusted by a single resistor, what´s also associated with other parameters like preconditioning current and charging termination. MCP73831 also contains a thermal regulation, which decreases output current in case of increased chip temperature (for example because of higher ambient temperature).

MCP7383x is available in four versions with factory-set regulation (max. charging) voltage. In our store can be found “the safest” first version with 4.20V regulation voltage – MCP73831T-2ATI/OT. In datasheet (p. 25) we can also read that this is the “AT“ version, which starts repeated charging at 94% Vreg (i.e. at approx. 3.95V), in a SOT23-5 package. Supply voltage can be in a range of 3.75-6V, while in respect to a thermal stress of a chip it´s better to supply it by a voltage close to max. output voltage (4,20V).

The chip can be easily supplied by a standard 5V voltage, but in cases of increased risk of overheating (operation at higher ambient temperatures, densely populated PCB,…), a common Si diode in series can be helpful. This will decrease supply voltage in 0.6-0.7V (and takes a portion of thermal loss on itself).
Charging status can be found at the “Charge status output” pin, which can drive an indication LED or can be connected to a host microcontroller.

With MCP73831 you’ll charge lithium cells easily and safely – [Link]



 
 
 

 

 

 

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