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26 Mar 2015

obr1675_1

Silent operation, immunity against mechanical shocks and magnetic field and other factors make a solid state relay the best choice for many applications.

Where to start? We´ll try to name “pluses” of solid state relays – SSR:

  • long lifetime, no moving parts, no contact burning
  • silent operation, very desirable for commercial and medical applications
  • minimum electrical noise thanks to a possibility of zero-crossing switching
  • easy control (interfacing) and minimum energy consumption to control
  • resistance to shocks and vibrations, installation in any position
  • fast switching (approx. 0.1 ms)
  • low weight
  • immunity to outer magnetic field (usable near powerful motors,…)

Some disadvantage of SSR is, that they generate more heat when conducting a current through “contacts”, than classic EMR. But this is dependent on a switched current. On the other hand – power consumption of the SSR itself is minimal in comparison to EMR of a similar size.

From above mentioned features result, that SSRs are a great choice everywhere, where it´s necessary to switch frequently and/or also to change rotation of motors (integrated in a single component). SSRs are also maximally suitable for switching of DC currents (solar applications, batteries,…) as they don´t suffer by arcing and contact wearing like classic EMRs (DC arcing is much more difficult to extinguish than the AC one). Much longer lifetime in comparison to EMRs result in very low operation/ service costs and significantly eliminates losses caused by eventual downtimes.

If we allured you to SSR, than it´s certainly worth to take a look at products of a leading producer in this field – výrobky spoločnosti CRYDOM, which specializes for development and production of SSRs already for over 40 years. Among novelties in our stock can be found Crydom SSR for PCB in SIP and miniSIP packages, panel mount types, as well as types for a DIN-rail mount. Their basic features are very similar, they differ mainly in max. voltage and current, which they´re able to switch.

Practically each SSR Crydom is available for switching of AC or DC current and also in an “R” version (random switching in any phase of AC voltage) or „ZCD – zero crossing“ switching in “zero” (suitable for minimizing of switching noise).

Detailed specification can be found in the datasheets at jednotlivých typoch and a help at selecting will provide you documents Crydom overview, Crydom product guide, Crydom Selecting SSR and Crydom motion control. The „SSR-the inside story” document is intended for those of you, who like to understand components deeply.


CRYDOM – solid state relays from specialists - [Link]

24 Mar 2015

obr1444_1

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:

18 Mar 2015

obr1187_1

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

obr1671_1

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

obr1670_1

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

obr1667_p645

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]

27 Feb 2015

BlueGecko

by elektor.com:

At the Embedded World conference held in Nuremberg, Germany this week Silicon Labs unveiled its Blue Gecko platform aimed squarely at Internet of Things applications. Silicon Labs have combined both their EFM32 Gecko MCU technology together with a 2.4GHz Bluetooth Low Energy transceiver (including a power amp and balun giving at least +10 dBm output power) on one die.

The 32-bit MCU inside the wireless SoC runs Bluetooth protocol stacks and scripting language developed by Bluegiga. Blue Gecko SoCs are based on ARM Cortex-M3 and M4 cores with 128 to 256 Kbyte flash and 16 to 32 Kbyte RAM. Silicon Labs are offering the complete Bluegiga Bluetooth Smart software stack for Blue Gecko modules and wireless SoCs. The stack implements the Bluetooth Smart protocol layers including the Attribute Protocol (ATT), Generic Attribute Profile (GATT), Generic Access Protocol (GAP) and security manager together with connection management.

Blue Gecko for the IOT - [Link]

25 Feb 2015

obr1664_1

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

obr1663_uvod

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]

16 Feb 2015

obr1661_1

New series of Friwo FOX mains adapters meets the most stringent energy regulations already now and at the same time it´s more compact than its predecessors.

DoE 2016 is a known term naming stringent regulations established by DoE (department of energy USA) valid from year 2016. Among other things it brings a requirement for a standby power consumption of small adapters to be below 0.1W. In Europe we have here a limit of 0.5W for majority of small adapters, but even here can be expected toughening in the nearest years.

That´s why German company Friwo as a long-term long-term OEM producer of power supplies and adapters comes with a new line of mains adapters named “FOX”. Besides high efficiency, these power supplies are also extraordinarily compact. Already recent series MPP and GPP are very compact, but FOX is a “step further”, as also illustrated on attached picture. System of exchangeable primary and secondary adapters (connectors) enables to use the same power supply for various applications and in various countries.

Even the FOX series meets various international requirements and obtained many approvals. a medical version will be also available soon. The FOX series is a novelty – 12W types are available upon order. Gradually also other types – FOX 18, FOX 30 a FOX 6 will be produced.
FOX series, as the only type on the market meets criteria for IP42 protection – with selected primary adapters (connectors).


An adapter with standby power consumption below 0.1W? - [Link]



 
 
 

 

 

 

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