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13 Jan 2015

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]


13 Jan 2015


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]

13 Jan 2015


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]

13 Jan 2015


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]

13 Jan 2015


by elektor.com:

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]

13 Jan 2015


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]

12 Jan 2015


by elektor.com:

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]

12 Jan 2015


via projectlog.ferranfabregas.info:

The idea behind this project is connect some sensors to the Raspberry Pi and put the information available on demand via Twitter requests and put sensor history data online on the web.

To do that, I used a DHT22 temperature and humidity sensor connected to the Rasberry Pi.

Sending weather data via Twitter using Rasbperry Pi and DHT22 - [Link]

12 Jan 2015


All about Op Amp stability app note from Linear Technology.

Well, it shouldn’t. We analog designers take great pains to make our amplifiers stable when we design them, but there are many situations that cause them to oscillate in the real world. Various types of loads can make them sing. Improperly designed feedback networks can cause instability. Insufficient supply bypassing can offend. Finally, inputs and outputs can oscillate by themselves as one-port systems. This article will address common causes of oscillation and their remedies.

App note: Does your op amp oscillate? - [Link]

12 Jan 2015


Beauty in simplicity – adjustable bimetal thermostat operates independently from a power supply.

Thermal comfort is, when a temperature in a house is 21-24 °C and a relative humidity is …. No, sorry, your device can withstand much more. At least 0 to 60°C or much more. If you have a device, where you need to guide the temperature, then DIN-rail thermostats are the simplest usable solution. Series 7T from company Finder offers a possibility to use such thermostats to control heating, cooling (fans) or their combination…

Besides purely industrial applications, these thermostats can also be used to control temperature in buildings or garages – for example as a frost protection. In our stock can be found five types, mainly with a range of 0 to +60°C. Available are 2 basic series – 7T81 and 7T91. 7T81 is a narrower, only 17.5 mm wide series. Series 7T91 is wider, with a more perforated enclosure, i.e. there´s an assumption of somewhat quicker reaction to temperature changes.

Orientation among types is simple. Types with a suffix …23xx are intended for switching of cooling (blue adjustable knob), i.e. after reaching a set temperature a bimetal contact switches on. Here belong for example types 7T. and 7T.

Types with a suffix …24xx are intended for switching of heating (red adjustable knob), i.e. after reaching a set temperature, a contact switches off. Here belong for example types 7T. and 7T. However in the 7T series can also be found types usable in both ways, for example 7T. (range +5 to +60°C).

Detailed information will provide you datasheets Finder 7T81 (EN) and Finder 7T91 (DE).

Thermostats Finder ensure a thermal comfort to your devices - [Link]





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