Researchers have developed the technology for a catheter-based device that would provide forward-looking, real-time, three-dimensional imaging from inside the heart, coronary arteries and peripheral blood vessels. With its volumetric imaging, the new device could better guide surgeons working in the heart, and potentially allow more of patients’ clogged arteries to be cleared without major surgery.
The device integrates ultrasound transducers with processing electronics on a single 1.4 millimeter silicon chip. On-chip processing of signals allows data from more than a hundred elements on the device to be transmitted using just 13 tiny cables, permitting it to easily travel through circuitous blood vessels. The forward-looking images produced by the device would provide significantly more information than existing cross-sectional ultrasound.
Single Chip Device to Provide Real-Time 3-D Images from Inside the Heart and Blood Vessels - [Link]
Smallest (2mm x 2.5mm), 8A, DC-DC Solution with Integrated MOSFETs in the Market
The MAX15108A high-efficiency, current-mode, synchronous step-down switching regulator with integrated power switches delivers up to 8A of output current. The regulator operates from 2.7V to 5.5V and provides an output voltage from 0.6V up to 95% of the input voltage, making the device ideal for distributed power systems, portable devices, and preregulation applications.
The IC utilizes a current-mode control architecture with a high gain transconductance error amplifier. The current-mode control architecture facilitates easy compensation design and ensures cycle-by-cycle current limit with fast response to line and load transients.
MAX15108A – High-Efficiency, 8A, Step-Down Switching Regulator - [Link]
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]
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]
In this episode Shahriar extensively reviews the Rigol DSA1030A-TG3 Spectrum Analyzer. A wide variety of experiments are performed using the Rigol spectrum analyzer to serve both as a tutorial to use the instrument and to demonstrate its capabilities. Some measurement results are also performed using other calibrated instruments to verify the accuracy of the spectrum analyzer. The Rigol DSA1030A-TG3 can be purchased directly from Rigol Inc.
Rigol DSA1030A-TG3 Spectrum Analyzer Review and Experiments - [Link]
Device stores twice the energy of microbatteries currently used in transmitters. By Tom Rickey:
RICHLAND, Wash. – Scientists have created a microbattery that packs twice the energy compared to current microbatteries used to monitor the movements of salmon through rivers in the Pacific Northwest and around the world.
The battery, a cylinder just slightly larger than a long grain of rice, is certainly not the world’s smallest battery, as engineers have created batteries far tinier than the width of a human hair. But those smaller batteries don’t hold enough energy to power acoustic fish tags. The new battery is small enough to be injected into an organism and holds much more energy than similar-sized batteries.
A battery small enough to be injected, energetic enough to track salmon - [Link]
ArduControl GUI let you control your Arduino pins using this simple GUI. Just specify your serial connection parameters and you are able to read the Analog port values, write the analog output values and toggle Digital ouput pins.
ArduControl GUI – Control your Arduino via PC GUI - [Link]
A research team from National Taiwan University, National Taipei University of Technology and Chang Gung University have described how they developed a free-swimming remote-controlled bare die at the IEEE International Solid-State circuits Conference (ISSCC) in San Francisco. The 21.2 mm square die made by TSMC using a 0.35 µm process, is able to travel at 0.3 mm/s submerged in a liquid. A similar device was presented at the ISSCC in 2012, which used Lorentz forces for propulsion. This design however uses electrodes along the four edges of the chip to generate bubbles as a product of electrolysis. [via]
A Free-Swimming Chip - [Link]
Circuit board business cards have been done. But since circuit boards are, literally, my business, I felt that I needed one too. Of course it also had to be special. Research and experimentation took a long time with this one and the design even sat dormant, ready, for a while before I sent it out to fab.
An engineer’s emergency kit business card - [Link]