Home Blog  

12 Sep 2013


500, 400, 300 mW are common values of coils power consumption of mid-power relays. But JV-xS settles for 200mW and operates even at 113 mW! 

Power consumption of for example 500 mW is low at the first sight and it may seem, that at a power consumption of other power circuitry it somehow “disappears”. Sometimes it maybe really is a relatively negligible value, but in many cases the power consumption matters very much. Apart from a general trend of power consumption reduction, a lower consumption enables for example a longer operation from a backup source at a voltage dropout. Moreover at arrays with several relays an overall consumption easily reaches even tens of Watts, what may bring for example problems with heat dissipation in summer season and similar.

Relays Fujitsu series JV-xS are quality relays of a mid power (5A) with a maximum switching voltage of 250VAC/ 1250VDC with a very sensitive coil. Small dimensions and a low profile (only 12.5 mm) contribute to versatility of the relay. Despite small dimensions provides JV-xS a high level of safety thanks to 5000VAC isolation strength (coil/ contacts) and construction from a self-extinguishing plastic.
JV-xS series is available with DC coils from 3 to 24V (JV-3S… JV-24S). Besides common versions for 5, 12 and 24V it´s possible to find in our store also the 9V version JV-9S-KT. Uponrequest we´re able to provide you also any other available versions.  Detailed information will provide you the Fujitsu JV datasheet.
In case of interest, please contact us at info@soselectronic.com.

Save energy with sensitive relays Fujitsu JV series – [Link]

19 Aug 2013


ST Microelectronics has introduced what it is calling the world’s smallest digital e-compass — a three-axis magnetometer combined with a three-axis accelerometer on a 2x2mm MEMS chip.

By saving board space on next-generation mobile devices, this device should enable new ultra-miniature, location-aware applications. Micro-electromechanical systems already provide much of the smarts to smartphones, and ST is already a major supplier for devices from Apple’s iPhone to Samsung’s Galaxy. However, a new generation of smartphones and other personal devices will have even less board space.

ST said in a press release that its new LSM303C is 20 percent smaller than previous models, saving just under a square millimeter of board space. That does not seem like much, but it will be welcome for devices such as smartwatches or monitoring bracelets, where space is especially precious.

ST Introduces Smallest MEMS Compass - [Link]

12 Aug 2013


ULN2003 – practical example of «reading» microchip schematic via Evil Mad Scientist

We often receive comments that while out microchip photos are beautiful and interesting, it is completely unclear how integrated circuit implements basic elements and form larger circuit. Of course it is impossible to do a detailed review of an 1’000’000 transistor chip, so we’ve found simpler example: ULN2003 – array ofDarlington transistors.

Despite it’s simplicity this microchip is still widely used and mass manufactured. ULN2003 contains 21 resistors, 14 BJT transistors and 7 diodes. It is used to control relatively high load (up to 50V/0.5A) from microcontroller pin. Canonical use case – to control segments of large 7-segment LED displays.

What’s inside the ULN2003 Darlington driver chip - [Link]

7 Aug 2013


TempFlat MEMS Eliminates Temperature Compensation. Steve Taranovich writes:

SiTime Corporation has introduced the TempFlat MEMS. Until recently, all MEMS oscillators used compensation circuitry to stabilize the output frequency over temperature. This new design eliminates temperature compensation, resulting in higher performance, smaller size, lower power and cost. The basic architecture of a MEMS oscillator combines a MEMS resonator die together with an oscillator IC. As shown on the left side of the diagrams below, SiTime has developed different types of MEMS resonators for different applications needs.

SiTime’s MEMS Resonators: An alternative to Quartz - [Link]

7 Aug 2013


From now, it´s even more probable to find the right connector for your application in our store. 

After success of so far types of connectors for memory cards and SIM cards, we add to our stock offer many other types of connectors for SIM cards, SD cards, micro SD cards, CF cards, E-SAT, DDR and other from company Attend.

We realize that at a development even seaming trifles are important, other pin position etc., which decide whether a given connector is usable or not in your application. That´s why we offer you at some types (SD, micro SD, SIM, …) even several versions of a seemingly same connector. From many types we have in stock initial amounts as yet, but soon we´ll increase this count – depending on your interest.
An interesting alternative to common micro SD connectors is the type  112C-TBAR-R02 with a swiveling holder. The connector is suitable for applications, where an often exchange of SD cards is not supposed, but it is necessary to save space on a PCB or where it´s not possible to insert a memory card from a side. Similarly interesting is the „2in1“ connector 112G-TA00-R for a micro SD and a SIM card. This connector particularly saves PCB space.

Should you be interested in a connector, which would be out of stock at the moment, or which we don´t have in the offer yet, don´t hesitate to contact us at info@soselectronic.com.

Memory media and data communication without limitations – [Link]

5 Aug 2013


The LT3763 is a synchronous buck LED driver controller that delivers over 300W of LED power. Its 6V to 60V input voltage range makes it ideal for a wide variety of applications, including automotive, industrial and architectural lighting. Similarly, its output voltage can be set from 0V to 55V, enabling it to drive a wide range of LEDs in a single string. The LT3763 offers both input and output current monitors and limiting, which accurately control both input and output current. The LT3763 also offers accurate output voltage regulation as well as input regulation, useful for high impedance sources such as solar panels. Its constant current and constant voltage regulation makes it ideal for applications ranging from driving high brightness LEDs to battery and supercap charging

LT3763 – 60V High Current Step-Down LED Driver Controller - [Link]

1 Aug 2013


PoE – Power over Ethernet is already a common is already a common matter. With the Ag5200 module you too can use this functionality and eliminate a mains adapter. 

A thought to use an Ethernet cable even for a power supply is already known for many years. To use an existing data connection even for an energy transmission is an attractive possibility how to eliminate a lot of mains adapters and to gain a possibility of a power consumption control and many other advantages …

After first attempts of some companies, there was accepted an international standard named as IEEE 802.3af (12,95W) and later even the 802.3at (25,5W). Despite the fact, that this system has some disadvantages like for example losses in relatively thin wires, advantages in a form of so to say everywhere-available power supply and elimination of a lot of mains inlets and adapters are significantly outweigh. That´s why the PoE system is becoming an international standard for power supply of many devices connected to Ethernet. Typical examples of PoE usage are VoIP telephones, Ethernet cameras, sensors, security devices, routers,  …

That´s why we add to our standard stock offer the Ag5200 module with a maximum power of up to 30W, enabling a very simple implementation of PoE into a target device. Ag5200 is a complete module with an isolation DC/DC converter and a part for a communication with an energy supplying device. Partially adjustable output voltage (12V), 1500V galvanic isolation and a minimum count of necessary external components ensure a very simple implementation into a target device. Overload, short-circuit and thermal protection ensure a very simple integration into a target device. An advantage is, that the DC/DC converter with a high efficiency works in a wide range of input voltages – 37 to 57V.     

Detailed information will provide you the leták Ag5200, katalógový list Ag5200 as well as a basic description of IEEE 802.3at.
In case of interest, please contact us at info@soselectronic.com.

Ag5200 module will provide energy to your devices from an Ethernet cable – [Link]

29 Jul 2013


The MAX14777 quad SPST switch supports analog signals above and below the rails with a single 3.0V to 5.5V supply. The device features a selectable -15V/+35V or -15V/+15V analog signal range for all switches. Each switch has a separate control input to allow independent switching, making the device an alternative to opto-relays in applications that do not need galvanic isolation.

The IC features 10Ω (max) on-resistance, and 9mΩ (typ) RON flatness, along with a low 50nA (max at +85°C) on-leakage. For maximum signal integrity, the device keeps this performance over the entire common-mode voltage range. Each switch can carry up to 60mA (max) of continuous current in either direction.

MAX14777 – Quad Beyond-the-Rails -15V to +35V Analog Switch - [Link]

26 Jul 2013


Aesthetic and relatively massive enclosures from company Fastron are the novelty able to provide an attractive look to your devices. 

Metal enclosures are a stable part of our offer. We usually choose them, when wanting to produce a device with a higher mechanical rigidity or with a higher resistance to disturbances (EMI shielding) but even for example in cases when we want our device to have a more “luxury” impression. An interesting novelty in this segment are new aluminium enclosures of the FSG and FHG series from company Fastron.

FSG (FSG1084, FSG1584, FSG2084, FSG2584) series enclosures are constructed as 4-piece with 1.5mm thick walls and with a front/ rear panel up to 2mm thick. Enclosure construction enables an easy assembly of a target device and also a good access in case of servicing and similar. Enclosures are supplied assembled and with 4 self-adhesion feet. Enclosures are treated with a green powder coating (upper part) and with a grey coating (bottom part). Front and rear part are chromate ( a chemical process creating a thin layer protecting from corrosion and improving adhesion of further coatings/ paint). It´s worth to notice considerably different dimensions (width) of the smallest and the biggest enclosure. A wide front panel offers an interesting construction and design alternative to common enclosures.
FHG series enclosure FHG214 is a relatively big DIN rail enclosure featuring a precise construction and very good shielding properties. All-aluminium construction and an integrated DIN-rail holder give a proposal of a long lifetime. Vast perforation enables a trouble-free intensive cooling of electronics.

Detailed information will provide you the  Fastron_metal _enclosures. In case of interest of interest, please contact us at info@soselectronic.com.

Fastron – metal enclosures with fluent shapes – [Link]

20 Jul 2013


A well known reliable PCB relay can be now found in our store in the version V23084-C2002, fully usable in demanding automotive applications. 

Previous version of widely used relay V23084-C2001 we introduced to you in the article Automotive relay for PCB used by leading world producers. However after many years of production this relay has appeared in the obsolete category, that´s why we enriched our stock with its near relative – V23084-C2002-A403, TE Connectivity ordering no. 1393267-2. The difference is in the coil sensitivity and in the material of contacts. New type has a coil switching already at 5,8 V and contacts are on the AgSnO2 basis. Because of different contacts material, the maximum continuous current is 2x18A, what is in about 10% lower than at previous version, but in praxis this limitation shouldn´t occur in the most of applications. A good information is a considerably lower price of this version.

Specified temperature range corresponds to industrial range -40 to +85°C.  Typical segments of usage are car alarms, door control and locking, control of seats, windows and wipers, and various other low voltage applications with higher current demands.
Detailed information will provide you the V23084-C2002-A403 datasheet.  In case of interest, please contact us at info@soselectronic.com.

Favorite automotive relay V23084 in a new cloth – [Link]





Search Site | Advertising | Contact Us
Elektrotekno.com | Free Schematics Search Engine | Electronic Kits