Switch-mode regulator Traco TSR 0.5 will give you as much as you need. If you have an application, where 0.5A is sufficient, then the new series of DC/DC modules is ideal for you.
Maybe, it´s worth to ask a question, whether it makes sense to use a switch-mode regulator for such a low current? For sure yes, at least because of two reasons. If we need to create 3.3V from for example 12V, then at a current of 0.5A a power loss of 4.35W appears at a classic linear regulator. That´s already a quite considerable power, able to heat up a device – especially at smaller enclosures and a dense population on a PCB.
Another reason is energy saving – especially at battery powered devices. Switch mode power supplies (SMPS) have a “genial” feature, that thanks to their high efficiency we use practically whole power drawn from a source, i.e. if we need say 5V/0.5A from a 15V source – we won´t take from it 0.5A but only approx. 0,17-0,18A.
Novelty of company Traco Electronic – series TSR 0.5 is by its function very similar to well known, proven DC/DC regulators TSR1 or TSRN1. The main difference is in a smaller allowed current and a feelingly lower price . That ´s why this series is very suitable for any application, where a current of 0.5A will be sufficient. A big advantage can be a wide operating temperatures range from -40 to +90°C (power derating 5%/K at temperature above 80°C). Maximum input voltage of 32V enables a usage even at power supplying from various alternative energy sources with a big input voltage fluctuations.
This novelty is so far available in a version with 5V output voltage (TSR 0.5-2450) and soon there will be another.
Why to pay for the current, which you won´t use? - [Link]
StickyBUGs are small, modular boards that enable you to quickly make your own Arduino shield, with no wiring or soldering required!
StickyBUGs are small, modular boards that enable you to very quickly make your own shield, with no wiring or soldering required! Take a handful of stickyBUGs, plug them into the main stickySHIELD and you are ready to go! Full sample and library code is provided. StickyBUGs can be placed in any order, making them the ultimate configurable solution for Arduino development. Now you can create the shield you want that will fit perfectly into your next project. Fast, configurable and low cost make stickyBUGs an ideal addition to any makers toolbox.
StickyBUG – Make Your Own Shields for Arduino - [Link]
Rohde & Schwarz designed the new 200 MHz models of the R&S RTM oscilloscope especially for universities and educational institutions. The education mode was developed for test and measurement practica and makes it possible to disable all analysis tools (e.g. Autoset and QuickMeas) and automatic measurements. This improves the learning effect as students and learners have to calculate measurement results on their own. The mode is password-protected and available for the other bandwidth models of the R&S RTM family as well.
The R&S RTM is also ideal for general T&M applications in development, manufacturing and service. Using the R&S RTM-B200, -B201 and -B202 bandwidth upgrade options, the 200 MHz models can grow with future requirements and be expanded to 500 MHz. The new R&S RTM-K32 digital voltmeter option enables the R&S RTM to measure various values such as AC, DC, peak and crest factor with three-digit accuracy regardless of the oscilloscope’s triggering. A seven-digit frequency counter has also been integrated into the scope.
200 MHz bandwidth, education mode, digital voltmeter and frequency counter added to R&S RTM bench oscilloscope - [Link]
Solar Impulse plane set to circle world using renewable energy via euronews
A plane powered by the sun, the Solar Impulse 2, has left Switzerland in a cargo flight bound for Abu Dhabi.
Once there, it will attempt a flight around the world, over India and China, taking in Hawaii and the rest of the US before crossing the Atlantic to southern Europe, northern Africa and completing the circle back to the UAE.
“We would like to demonstrate, with Solar Impulse, that we can today achieve incredible things with renewable energies and clean technologies,” explained Dr. Bertrand Piccard, founder of the Solar Impulse project.
“If an aeroplane can fly with no fuel around the world, can you imagine how this technologies could be used everywhere? We have today solutions, technical solutions, to divide by two the energy consumption of the world, and simultaneously create jobs and make profit for the industry,” added Piccard.
Solar Powered Plane Set To Fly Around The World - [Link]
by Jessica Lipsky @ edn.com:
Intel announced at CES 2015 the Broadwell family, its fifth-generation Core processors. The 14 new chips are essentially versions of the company’s 22nm Haswell architecture made in its new 14nm process, providing enhancements it hopes encourages PC and notebook users to upgrade.
Intel will offer dual and quad-core chips — 10 processors at 15W (both Core i5 and i7 chips) with Intel HD graphics, and four 28W products with Intel Iris Graphics spanning i3, i5, and i7 lines. The dual-core chips have 1.9 billion transistors, a 35% increase over the prior generation, and a 133 mm2 footprint that is approximately 50mm2 smaller than its predecessors. The 15W chips have data rates up to 3.1 GHz while 28W i7 cores hit up to 3.4 GHz.
Intel rolls 14nm Broadwell in Vegas - [Link]
This project was made to fill in the lack of electronic systems out there. Guitars have the gTar, pianos have the roll-up version, but there isn’t really a well known electronic replacement for the traditionally expensive and loud drum sets. The system can further be downsized, perhaps to wrist-strap form, as the only necessary components per “drum stick” is a flex sensor and a microphone, components that total less than $5. We plan to develop this from its prototype form into a more marketable product. Hone your drum skills outside of band practice at a fraction of the price. Do it in the comfort of your home without disturbing the neighbors.
Cheap and modular drum system - [Link]
by Samir Borle & Peter Li :
For our final project, we have decided to use the microcontroller provided to make a device which would measure body fat percentage of one’s body. The basic principle behind this project is known as bioelectrical impedance analysis. This technique uses a small alternating current flowing between two electrodes attached to skin surface to determine impedance. By determining the opposition to the electric current through body tissues, we can estimate the water content of the human body and use it to estimate fat-free body mass. The IV response characteristics of these tissues can provide a good estimation of percentage body fat.
Bioelectrical Body Fat Analyzer - [Link]
MEMS manufacturer Kionix Inc recently announced the introduction of their thinnest full-functional tri-axis accelerometers: the KX112 (2.0 x 2.0 x 0.6 mm) and the KXCJB (3.0 x 3.0 x 0.45 mm). At 0.45 mm thick the KXCJB is half the thickness of its predecessor.
The size of the KX112 makes it suitable for integration into compact devices for wearable and health/medical applications. A wide range of functionality is built into the small outline with algorithms to detect motion for power management, free-fall detect for device protection or warranty monitoring, an orientation engine for portrait/landscape detection and tap/double-tap for user interface functionality. It also incorporates Kionix’s FlexSet performance optimizing technology for control of accelerometer power usage and noise value trade-off. It features a large 2048-byte FIFO/LIFO buffer which allows the rest of the system to remain in low power mode while the KX112 stores sensor measurements. The accelerometer can supply output data with 8 or 16-bit resolution and with a user selectable range of ± 2g, 4g or 8g.
Tri-axis Accelerometers get Thinner - [Link]
Limpkin wrote this blog article about his tiny NFC Reader with a TRF7970A build, and he will be giving a few of them away:
The main components are:
– the USB-enabled ATMega32U4
– a connector for the NRF24L01
– a Lithium-Ion battery charger
– an NFC transceiver
– a proximity sensor
The main idea of this platform is to read NFC tags while keeping its power consumption low. The microcontroller is communicating with the NFC transceiver so you can use the platform as a standalone device or computer peripheral.
You could therefore control a switch (using the expansion header), send the tag data via RF (using a NRF24L01 you’d connect) or simply have the ATMega32U4 forward the read/write commands sent from your computer. The original idea was to support libnfc.
Tiny NFC reader with a TRF7970A - [Link]
At a presentation at the CES in Las Vegas this week, Intel’s CEO Brian Krzanich, showcased their new wearable Curie module. This comes a year after their Edison development system for wearable devices was given its first airing at CES 2014. Intel does not expect the Curie to be available until the second half of 2015 so technical details of the system are a little sketchy. What we can say is that this preliminary version of the Curie is a whole lot smaller than the present day Edison (which was originally intended to be the size of an SD card but grew a few millimetres by the time it reached production).
The Intel Curie Wearable - [Link]