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27 Mar 2015


To tell the truth, probably no, but we have for you a few hints for relays which are very close to an ideal.

Signal relay is almost an „ideal component“ thanks to a practically zero distortion and a total isolation of a switched signal from a control one. That is naturally one of the main features of all electromechanical relays, but at signal relays it´s especially valued, as we usually require switching of relatively small signals. Favorite and widely used are for example relays Fujitsu series B3 and B4 (miniature SMT and THT relays) and series AxW (miniature only 5mm high relay) – all with bifurcated gold-plated contacts for a high reliability.

A novelty in our portfolio is the series Fujitsu NA representing something like a “golden middle way “. With dimensions 7,4×14,9×9,7 mm it belongs to narrow miniature relay enabling a high density of components on a PCB. Even though relay NA is somewhat bigger than for example series B4, but it´s able to withstand higher AC current – up to 0.5A/125VAC (vs. 0.3A at series B4) and it also provides an extreme mechanical lifetime up to 100×106 , what´s approximately twice that of B4 series. Sensitive coils, with a consumption of 0.1-0.3W at majority of types enable a dense mounting without problems with overheating.

From the point of view of the lowest possible consumption are naturally the best latching relays (with a permanent magnet) controlled only by pulses. Usually they´re easy to recognize by a letter „L“ behind the series marking (for example NAL, JSL). In a Fujitsu signal relays overview and the Fujitsu catalogue can be easily found a comparison among particular types as well as detailed information about them. We try to keep the most favorite types always on stock, what´s also reflected in the substantial increasing of stock.

Does a universal signal relay exist? - [Link]

24 Mar 2015


When observing basic rules will the top quality AGM VRLA batteries last you up to 15 years – we will advise how.

This description could start by a long list of technical improvements of Panasonic batteries. thanks to which they gained a stable place on the top of development in this segment (AGM, expanded positive grid. additives for regeneration from a deep discharge, self-extinguishing container material,…).

However those are things, which can be easily checked up from available internet source or even better from satisfied users. Instead of it, we better bring you a few advices for usage of VRLA/ SLA batteries to serve you as long as possible:

20 Mar 2015


With Sensirion humidity and temperature sensors you can be sure of what you measure. Moreover, now we´ll support your development by free samples.

Top-class calibrated humidity and temperature sensors Sensirion already gained many fans. Mainly thanks to a fact, that they´re not only “sensors” but a ready-made solution with a pre-amplifier, ADC and other circuits, which directly provide a final value in a digital form. That´s why it´s not necessary to solve input portion (noise, shielding, power supply, length of wires,…). Moreover, their long-term stability is verified in a praxis.

Features and usage of Sensirion sensors was introduced to you in many our articles. In the Sensirion portfolio can be found easily solderable types on a small PCB like for example SHT11(15) or SHT71 (75), as well as miniature types in SMT DFN packages like for example SHT21 (25) and also the new SHTC1. Small DFN package is practically impossible to solder manually, but it´s relatively easily manageable by means of a solder paste and a hot-air soldering station or ideally by a reflow in a hot-air oven.

Maybe, you´ve already noticed, that in many articles we also bring you a contest with a possibility to win free samples of a given component. We usually draw by lots 1-10 winners, which will directly receive free samples.

Still, if you´re seriously interested to try a given sample for a development of your (industrial) application, please contact us by e-mail. In many cases, we can provide you a given sample even if you wasn´t one of lucky winners of the contest.

Evaluate the Swiss precision for free! - [Link]

18 Mar 2015


LT series LED drivers with 10-100W power represent a complete solution with wide possibilities of control. Exceptionally narrow and slim design, remained even at high-power versions, provides a high flexibility of use. 

Power supplies for LED lighting (so called drivers) are available from many producers, in a various qualitative level. Why to decide just for the LT series from German company Friwo? Here are few reasons:

  • precise design, safe operation and a long lifetime
  • voltage and current regulation in one device
  • high efficiency and a possibility of dimming in a range of 0-100% directly via a CTRL pin
  • modules are available in 10-100W power, with a possibility of customization by laser directly at production
  •  also available a module for dimming – so called DIMMbox, further expanding possibilities of control (switch, 1-10V, DALI) and with a possibility of synchronization with up to 1000 slave units
  • very small cross section of modules (21x30mm, resp. 24x30mm at LT100) – applicable even in very tiny conditions

Wide control possibilities of LT series modules are perhaps the most interesting. Modules contain a galvanically isolated CTRL input, by which it is possible to switch on/ off the module without disconnecting from 230V mains. CTRL pin also serves for regulation of an output current. For this purpose, only one resistor (or a potentiometer) is necessary – connected between SEC+ and CTRL pins, with a value counted by a simple formula in the datasheet. The output current can also be controlled by an external voltage in the range of 0-1,8V connected to SEC- and CTRL, as well as by means of a PWM TTL (0/5V).

Further possibilities of control are provided by a standalone additional module DIMMbox. DIMMbox operates as an (almost) lossless PWM regulator with a MOSFET switched at f=600Hz. DIMM-BOX connected to any series LT driver enables to regulate an output current in a range of 10-100% or 0% (OFF) via a usual switch („switch-dimm“ mode), via a linear voltage 1-10V and also a DALI interface. DIMMbox tests after switching on, which of three methods of control is used and consequently accepts only signals from a given input – until switching off the module. DIMMboxes can be connected through SYNC inputs, ensuring the same level of dimming for all modules. Enclosed pictures will provide you the best idea about possibilities of connection.

Every power class is available in several versions, with various output voltages and currents . Detailed information will provide you the LT series overview, DIMMbox datasheet, as well as datasheets of particular models, for example LT20 or LT100.

Friwo LED drivers will light up your LEDs as much as you just want - [Link]

10 Mar 2015


New communication module WIZ550WEB offers interesting possibility how to get any device on the web.

To administrate devices through a web interface is simple, fast and comfortable. Also can be added, that it´s a solution that saves time and money and in a vast majority of cases it´s beneficial for a producer and also a customer. Besides common “network devices” for example for data acquisition (telemetry – when we want a device to send measured data), a network connectivity is still more used at devices, whose functionality is not dependent on a web connection. Usually here belong devices, where this “extra functionality” brings several advantages.

Example of such device can be for example a heating boiler, where a user can comfortably monitor its operation and change temperature and in case of a required service a producer can diagnostic the device remotely – without a costly personal inspection.

Novelty in this field is the WIZ550WEB module based on the W5500 chip (10/100 Mbps) from company Wiznet and the STM32F103RBT6 MCU. Hardwired core is highly stable and resistant to attacks. By means of the WIZ550WEB module you can use 16 digital I/O pins and 4 analogue inputs. It also supports serial configuration via AT commands.

The simplest way to start is to use a rich-featured development board Wiz550WEB-EVB with 8 output relays, 8 digital inputs with optocouplers (TLP290-4) and 4 analogue inputs (0-12V).

Detailed information will provide you documents Wiz550WEB_datasheet, Wiz550WEB_getting_started and Wiz550WEB_users_guide. Also useful are Wiz550WEB and EVB kitu schematics.

With the WIZ550WEB module you’re immediately on the web - [Link]

6 Mar 2015


That´s why this modern multimeter is also suitable development of sensitive and “ultra low power“ devices.

Wide offer of modern measuring equipment enables us to choose a suitable device for every purpose and in various price levels. A decision which device to buy and/or a decision whether it´s worth to go for a higher-level device surely isn´t easy.

UT61D, which we want to introduce to you this time offers all usual features – at the first sight. But when we go deeper, we find out that besides a pleasant resolution (5999) and a decent precision (0,5-0,8%) it also offers 60mV ranges – for DC and also AC. Especially in the AC field it´s not that common (at equipment of thice price-level) and moreover – all that we measure in the AC signals can be labeled as TRMS (true RMS). And to all this, also measuring of current starts with a 600uA range (DC aj AC), what means measuring with a 0,1uA resolution.

Probably the last main bonus of UT61D is a possibility of communication with PC via serial port (RS232) and displaying of measured parameters in a simple graphic software.

Detailed information will provide you the UT61D user guide as well as UT61 family flyer.

UT61D handles high and also extra low voltages - [Link]

3 Mar 2015


Thanks to a simple adapter, MEC Unimec switches can be used even in places, where their original height wouldn´t be sufficient.

We already know, that Switches MEC Unimec switch in up to eight ways and also that they´re available as momentary or alternate (latching). UNIMEC switches feature perhaps only one “disadvantage” – that on the same PCB no other higher components can be used (which would be higher than the switch). If you´re satisfied with the UNIMEC features, but despite that you cannot use them in your application right for their (low) height, we have for you a solution. It is based on usage of the „16270 extender“. In combination with any right-angle cap of the 16300 series and with a prolonged bezel 16324 (16325,16326) we gain by this combination a switch higher in 4.5 mm. This simple solution is also suitable for cases don´t have high components on a PCB but from any reason it´s advantageous, when some room will be left between a front panel and a PCB (for cooling, …)  Detailed information will provide you the MEC 16324-16326 brochure and the Unimec datasheet. Selected types are in stock and upon request we´re able to provide you any other components from MEC.

MEC extender – and you’re a level higher - [Link]

25 Feb 2015


AC/DC modules Traco TMPS 03 with dimensions of 1“x1“x0,6“ represent a top-class solution of power supply with minimum space requirement.

Power supplies with a high power density (W/cm3) are nowadays offered by several producers. However, perhaps the biggest challenge is a miniature power supply with a power of say a few Watts. It´s because even these smallest power supplies need practically the same components like the bigger sources need (just less powerful of course), but dimensions of these “weaker” components are usually only slightly smaller than powerful ones.
In this case the new TracoPower TMPS 03 series brings a literally new dimension. Dimensions 1×1 inch (25.4mm) and a height only 15.3mm enable usage of TMPS modules even in devices, where every cm3 is precious.

A big advantage is, that the TMPS module is capable of a short-time (<30s) repetitive operation delivering up to 30% higher power (while maintaining average total power of 3W). This can be valued for devices requiring higher start-up current, or at driving small motors and similar. TMPS easily meets requirements for a small standby power consumption, as it only needs 0,15 W in the no-load condition.
TMPS series module can be sourced from “any” AC mains line (85-264VAC) and even from a DC line (120-370VDC).

One “inch” will provide you 3 Watts - [Link]

22 Feb 2015


Thanks to the enhanced functionality of the M95 FA module, this new version of the favorite GSM/GPRS module can be used for even more applications.

Quectel M95 communication module is already well-known among designers and we can say, that also very favorite. Its producer also knows this fact, that´s why Quectel decided to come to the market not with a new type, which might have other package, functionality,…. but a new version of M95, marked as M95FA. M95 FA maintains compatibility with the previous versions M95A (R1.0) and M95 EB, plus it naturally adds something new …Similarly like M95EB , even the „FA“ supports eCall and DSSS (Dual SIM single standby), but also supports digital audio, secure data transfer thanks to the SSL and other. M95 FA is based on the latest MTK chipset, ensuring long lifetime and availability. M95 gained various international certificates and meets all requirements in the GSM/GPRS bands.

To make the development easier, M95 FA is also available on the so called adaptor board – M95FA-TEA-03-STD,usable with the M10EVBKIT.
Detailed information can be found in the Quectel M95 flyer, Quectel 2014 catalogue and upon request we´ll send you complete detailed SW and HW documentation.

New version of the GSM/GPRS module Quectel M95 is here - [Link]

19 Feb 2015


SosElectronics offers you simply applicable solution of a power LED on a thermal clad in a special offer! 


  • power white SMD LED Luxeon Rebel
  • luminous flux min. 100 lm / 350 mA
  • specified to continuous 700 mA / 3,2 V
  • made on a ceramic base with electrically insulated thermal pad
  • guaranteed lumen maintanance 70% of original value at 50 000 hrs / 700mA / Tj 135°C
  • low moisture sensitivity – JEDEC Level 1
  • dimensions: 4,61 x 3,17 x 2,10 mm


  • thermal clad for Lumileds Luxeon Rebel
  • optimal heat transfer from LED to heatsink
  • longer LED lifetime and luminosity thanks to a lower operating temperature
  • star board
  • easy application

Readily usable LED for exceptional price - [Link]





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