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19 Mar 2014


Low profile, higher safety and a wide spectrum of power ranges ensures, that in the TBL series you´ll find the right type for your demands.

Quality AC/DC power supplies for industrial automation and equipment of buildings (intelligent houses, …) are one of the fundamental supposals of a successful and reliable application. But how to choose the “right one”? Sure, there´s a lot of criteria and one of them is the requirement to fit into flat – low profile distribution boxes. This requirement is well met in the Traco TBL series, with the height of only 54,5 mm (after attaching to a DIN rail). TBL series provides a high safety (safety class II) and meets for example UL 1310 class II requirements (15-90W models). A big advantage is a wide range of operating temperatures -25 to +70°C (up to +60°C without power derating).

TBL series is available in 5 power ranges from 15 to 150W and also available is the 60W backup source (UPS) TBL-BC comprising circuitry for battery management. If necessary, it´s also possible to adjust output voltage (5-5,2V, 12-16V, 24-28V) – for example to compensate long conductors to a target device. In respect to an overall design and a high reliability, the TBL series is also suitable for supplying of security devices (alarms).

Detailed information will provide you the Traco TBL datasheet, TBL series models list and installation instructions.

Traco TBL power supplies fit into every distribution box - [Link]

15 Mar 2014

Dave reviews the DIYINHK 1080p USB soldering microscope. A hacked Microsoft Lifecam webcam with optics enabling a large working distance and good depth of field.
Also showing off the Tagarno FHD ZIP Full HD 1920×1080 60fps USB 3.0 30x optical zoom vision inspection microscope using Youcam 6

EEVblog #590 – DIYINHK 1080P HD USB Soldering Microscope Review - [Link]

10 Mar 2014


It´s surely not necessary to remind that any device can fail. Failure of a component, overload of a component (underestimated sizing), external influence and many other reasons are daily causing failures of devices. If the result of a malfunction is only an intermediate shutdown, it´s let´s say a better case. But if a device malfunction could cause further damage or even fire, it´s surely worth to make everything possible to prevent it.

A typical component used as a complementary – independent protection from overheating is a thermal fuse. It is a cheap but very useful component, which opens (disconnects) a circuit after exceeding certain temperature. It is a “one shot” component, i.e. after its activation it remains open and the fused circuit is disconnected (the fuse must be exchanged). It´s suitable to choose such fusing temperature of the fuse, as we consider to be really faulty, which otherwise can´t occur in an ordinary operation. Production processes enable to produce thermal fuses in a wide range of temperatures and so fuses Microtemp from company Thermodisc, which we keep in stock, are available in a range of 72-257°C (opening temperature). It´s a really wide range enabling to use a fuse for example for fusing of other component (for example a thermal fuse thermally joined with a transistor heatsink) but also for guarding an air temperature inside a device. These fuses operate on a principle of melting a small plastic pellet inside a fuse, what will cause release of a spring and a consequent disconnection of contacts.

A substantial advantage of thermal fuses Thermodisc is a maximum current up to 10-25A/250VAC depending on a type. On stock we keep the G4 series with a max. current of 10A/250VAC. Small dimensions enable to use a component similarly like any ordinary component. It´s only necessary to be careful at assembling (overheating) especially at low-temperature types.
Details regarding a correct assembly as well as an overview and tips for a correct use of thermal fuses can be find in the Thermodisc application guide. Thermal fuses are also available in other packages, or also with tabs (Fast-in). Finally, we can mention, that to reach the highest protection level in critical application, it´s ideal to incorporate several types with a slightly different fusing temperature in series.

They act only ones – right then, when it´s really necessary… – [Link]

6 Mar 2014


High efficiency, low standby power consumption and a power reserve, all this can be gained with a new adapter from our portfolio.

Minwa NR120P150PGS/E+ is in fact an “ordinary“ adapter with a fixed output voltage 12VDC/1500 mA. But it´s worth to mention, that it meets everything, what we usually require from a modern mains adapter:

  • modern design (SMPS)
  • high efficiency
  • low standby power consumption (<0.3W)
  • meets all latest regulations – EuP2, ErP,…

And finally a bonus – outstanding price. Adapters from company Minwa are in general always price-affordable, but here it is even more obvious. When we compare a one level weaker adapter NK120P100PGS/E+ (12V/1000 mA) with NR120P150PGS/E+ we´ll find, that for the price higher +14 (already at purchase of one piece) we´ll gain +50% power. So if you have a device requiring up to 1.5A current, or you use a 1A adapter at almost 100% and you want to gain some power reserve and probably a longer lifetime of an adapter, you can do so with minimum expenses.

Plus 50% of power for a scant one Euro? - [Link]

1 Mar 2014


Long term reliable contact without interference, creaking and hum, moreover in a beautiful coat – these are the Neutrik / Rean connectors.

Connectors have in general one interesting feature – there are many similar or almost the same connectors on the market. Audio connectors are not exception in this. Even though they look the same, many times there are huge differences in price and mainly in quality. If we supposed, that every producer designs and makes his products likewise responsibly, then the cheaper one should be probably a good choice. Naturally, in praxis it isn´t so.

A real difference between a quality and a low-class connector can be known only at a close-detail investigation and comparison, and ideally after a real testing in praxis.
Quality audio connector must be made of quality materials and also with a high precision. Naturally, if a producer wants to achieve success on a market, it´s often simply impossible to use a too expensive connector, which would over-price the whole device.

That´s why you can find in our store the Neutrik / Rean connectors offering a high-end class for a very reasonable price. Company Neutrik specializes already for almost 40 years in audio connectors and in general connectors for audio/ video studios, equipment of concerts (backstage) and similar, that´s why also in loudspeaker connectors, power supply, Ethernet,…
In the Neutrik products can also be found connectors Rean representing even more affordable price level while maintaining a very high quality. Already a short look at details of Neutrik/ Rean connectors will tell us, that we´re dealing with precision connectors. A matter of course is a detailed documentation with an exact description of electrical features and materials used. A comprehensive overview about available types will give you the Rean catalogue and the Neutrik catalogue (22MB). To many sophisticated connectors like for example NYS373 there are also available assembly instructions.

Uncompromising quality audio connectors for a compromising price - [Link]

27 Feb 2014


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,

In the series 55 can be found types which can be soldered directly into a PCB (without a socket) or to insert into some of many available sockets (for PCB, with soldering pins or on a DIN rail). Types from series 60 need to be inserted into a socket (for PCB, with soldering pins or on a DIN rail). Naturally, for eventual repair/maintanance, it´s much better to use a socket. Sockets can be equipped with metal or a plastic clip. Also exists a socket 94.94.3 with a safety separation of an input and output part. Similarly like at majority of Finder types, sockets can be equipped with optional protection and indication modules. Read the rest of this entry »

24 Feb 2014


Illuminated push-buttons represent a universal solution into every environment.

An answer to a question, whether it´s nicer to use a push-button with a backlight or not is perhaps a fully subjective matter. However besides an aesthetic point of view we know about at least two main reasons to use an illuminated push-button: easier orientation/ operation in a dark environment and an indication of a push-button status (activation of a given function).

So if we´ll decide for an illuminated push-button, it´s certainly beneficial to have a possibility to choose from a wide range of types and caps. In our offer can be found the best from this segment – components from a Danish MEC with over 70 years experience in production of push-buttons and switches.

Basic production portfolio of MEC switches can be divided into series „3“, „4“ and „5“. Seriesa „5“ i.e. for example 5G or 5E is the newest and the most perspective series, but also the “2” or “4” series are still popular. Types like 4FTH922 or 5GTH9358222 (4ATH98222) represent a ready-made solution with an LED. It´s also worth to mention a universal type 3FTL6, This type has besides a reliability, pleasant actuation and a crisp sound at switching yet one positive fature – it can be equipped with any 3mm LED. All that is necessary is to form leads into a required shape and apply a suitable cap. Perhaps the biggest advantage of this solution is a possibility to use a whatever LED according to your choice and this way to make a customized push-button (especially in smaller production batches). Naturally, at bigger production batches it´s possible to agree with a producer a production of various customized versions.

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

MEC push-buttons can be found even in the dark - [Link]

22 Feb 2014


EMI mains filters Schurter combined with an input AC connector will stop interference there, where it´s the most efficient – at the input.

To be more precise, usually it´s the best to eliminate interference (EMI) already at a source of interference itself. But because there are a lot of disturbance sources in a common 230V mains, the only reliable possibility how to protect our device is to equip it with a suitable filter. Another positive thing is also a prevention of possible transfer of noise from our device into a public network (mains).

Reasons why to use a filter or other EMI suppressing components are well known. In general here belongs a protection of circuits from unwanted influence (digital and analogue circuits), as well as protection from damage to a device in an urgent case. EMI is in general a “silent killer”, as it appears with a various intensity and often absolutely irregularly.

Those ones, who´ve already experienced searching for a fault, why a given device works irregularly, can say realistically about problems, which EMI is able to cause. It´s treacherous to think, that there´s no interference in a given place, because even if we´ve really measured only a small interference, it can appear anytime without warning.

Interference in mains can be described in four categories:

  • fluctuations (voltage) in an industrial network
  • harmonic interference in a range of 100Hz to 2 kHz
  • transient interference in a range up to 300 MHz
  • sinusoidal high frequency interference up to 1GHz (or even more)

In practice, interference appears mainly in last three categories. Filters are usually constructed from capacitors and inductors, or also some other components like varistors, transils, VHF chokes etc. Wide band filters are often composed of 2-3 stages. Capacitors connected between L-N are marked as „X“ and capacitors between L-PE and N-PE as „Y“ capacitors. Leakage current of a filter is mainly determined by „Y” capacitors. As medical devices must meet more stringent requirements for a leakage current, in most cases they don´t use „Y“ capacitors (even for the price of somewhat lower EMI suppression).

EMI filters are available in various versions and they use to be the most effective if they are directly on the device input. Swiss company Schurter as a specialist in a given segment offers a wide range of filters combined with an AC inlet socket or also with a switch and fuses. An advantage is that by using such a module, you´ll manage four components by one component and also their mechanical assembly to a panel. In our stable stock offer can be found several filters. Many details about a construction of Schurter filters will provide you the following document.

Say stop to unwanted “visitors” - [Link]

19 Feb 2014


If you want to go to the heart of a thing, then LCD TFT displays Winstar are right for you.

It can be said, that nowadays in the most cases it´s cheaper and faster to use a ready-made graphic module. From this category we keep in stock for example eDIP TFT modules from company Electronic Assembly, intelligent modules from company 4D Systems or also a hot novelty from company FTDI – technology EVE.

Naturally, despite this, it´s possible, that simply a ready-made intelligent module which would meet all your demands simply doesn´t exist. For these cases we have for you color TFT LCD displays from company WinStar (Taiwan). In our standard stock offer can be found displays WF43GTIB (4.3“, 480×272), WF57ETIB (5.7“, 320×240) and WF70HTIF (7.0“, 800×480). Displays incorporate a modern display controller SSD1963 supporting various communication formats, that´s why they offer so to say a free hand and a full control at your design. An idea about possibilities of these displays will give you an application note SSD1963 as well as datasheets WF43GTIBEDBT0 WF57ETIBCDBT0 and WF70HTIFGDBT0.

Company Winstar produces a large amount of various versions of displays, also without controllers.

Displays for those, who want to have everything under control - [Link]

19 Feb 2014


Silence at last – or what to do, if a silent operation of a fan matters to us?

Despite features of fans being still more improved, it´s still the fact, that they are usually the biggest noise source in devices. If a given device is intended say for a production hall, where an ambient noise is much higher, we probably don´t have to worry about it. But at devices intended for common rooms, offices, households etc., it´s naturally important to maintain the noise of a device as low as possible. If dimensions of a device allow it, it´s usually better and more silent solution to use a fan with a bigger diameter and a lower rotation speed. However, what to do when the size and a design of a fun suit us, but a power, rotation speed and consequently a noise are still uselessly high?

A partial solution is to decrease a supply voltage. Computer enthusiasts know very well, that a noise of a given fan depends (besides its aerodynamic construction) on its rotation speed. Solid producers like Sunon, specify range of operating voltages and a rotation speed at a given voltage (for example 12V). Also in a datasheet can be usually found even a start voltage, at which a given fan will reliably start to rotate. By a change of a supply voltage, we can change a fan speed, but it´s not possible to go below certain speed (at a given fan type). It´s common, that for example a 12V fan still works at 4V (when decreasing from 12 to 4V) but it´s already not able to start at such a low voltage.

Probably the best solution is to use a slower fan (with a lower rotation speed). Today almost every series of fans is available in 2-3 power levels, what reflects in a noise but also in different power consumption. This can be illustrated on 2 types of the same construction – MEC0251V1-A99 (MEC0251V1-0000-A99) and MEC0251V3-A99 (MEC0251V3-0000-A99). As for a mechanical construction, they are the same. The only difference is only in a rotation speed – 3100 vs. 2200 turns per minute. This is then reflected in a noise 44,5 vs. 34 dB and in a power consumption 5,4 vs. 1,9 Watt. The noise difference 10,5 dB is really big ( 6 dB difference is subjectively perceived as a double volume) and in many cases it´s surely not negligible even a power consumption difference of approx. -65%. Should you still be satisfied with a lower air flow, it´s naturally possible even at these slower types further decrease rotation speed by decreasing a supply voltage. Naturally, there are even more silent fans on the market, but types from company Sunon offer a very good compromise among noise, power and a price.

Choose a fan with a low noise and low power consumption - [Link]





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