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27 Sep 2011

 

newscientist.com writes:

What exactly are they?

With a neutral charge and nearly zero mass, neutrinos are the shadiest of particles, rarely interacting with ordinary matter and slipping through our bodies, buildings and the Earth at a rate of trillions per second.

First predicted in 1930 by Wolfgang Pauli, who won a Nobel prize for this work in 1945, they are produced in various nuclear reactions: fusion, which powers the sun; fission, harnessed by humans to make weapons and energy; and during natural radioactive decay inside the Earth.

Neutrinos: Everything you need to know - [Link]

27 Sep 2011

ostan.cz writes:

IR protocol analyzer is a universal application for automatic decoding several types of infrared remote control protocol packets. The application uses microphone input of a soundcard to capture infrared signal from a remote control. As a consequence, the hardware receiver is minimalistic and easy to build; just plug a phototransistor to input of your soundcard, that’s all hardware you need.

Application processes IR signal from a remote control and compares it with its own database of known protocols. When a match is found, packet is decoded and its characteristic is displayed to user (including protocol name, description, decoded data and graph with timing).

IR protocol analyzer - [Link]

27 Sep 2011

Line follower simulator. [via]

A model of differential driven wheeled robot is implemented. The width of the line sensor, the line sensor position and the wheel gauge (distance between the two wheels) can be adjusted.

Apart from the geometry settings, there is also a possibility to adjust the motor behavior. The “acceleration” scrollbar sets how quickly the robot chassis reacts to commands form the PID regulator.

Line follower simulator - [Link]

27 Sep 2011

This articles describes about making a general purpose I/O board that is easy to construct and is very useful for rapid prototyping of microcontroller-based projects. The board basically contains the most frequently used I/O devices and peripherals such as LCD, EEPROM, tact switches, LEDs, buzzer, etc. All the necessary pins of the devices on the board are accessible through female headers that allows easy connection of the board to a breadboard circuit or other development boards using male jumper wires.

Experimenter’s I/O board  - [Link]


27 Sep 2011

Breadboards are a great tool for designing and testing electronics circuits. Here Embedded Lab suggest some plug-in modules that would make your breadboarding life easier. These modules serve very common functions but their use will not only reduces the number of wire connections on breadboard, but also expedite your prototyping and makes debugging of the circuit easier.

Breadboard modules for rapid prototyping of microcontroller projects  - [Link]

27 Sep 2011

Aktakom redefines the meaning of the functional yet affordable arbitrary waveform function generators by introducing to the market the newest series of inexpensive generators that feature the latest DDS technology

       Miami Fl., September 27, 2011 – T&M Atlantic, distributor of the test and measurement equipment today unveiled a new series of waveform function generators by AKTAKOM. These newest instruments achieve the quality, speed and functionality of world leading brands, yet sell for the fraction of the price. AWG series of generators feature 5, 10 and 50 MHz bandwidth, 2 channels with a 125Ms/s sampling rate and 14 bit resolution. An innovative 5.7” clear color screen makes these devises functional and easy to use. All devices in the series come with two USB interfaces, allowing control of the device from the PC, as well easy flash storage support.

Read the rest of this entry »

27 Sep 2011

As renewable energy is becoming integrated into our everyday lives, new terms such as solar panel, photovoltaic and solar cell are more common and new devices, such as outdoor LED lighting are using this technology. The sun emits many forms of radiation. The best way to describe this is that there are ‘waves’ of energy that radiate from the sun at different frequencies.

This is only partially the truth as there is both a wave and particle nature to light.

The light spectrum is divided into different sections. It begins with the highest, gamma rays and ends with the lowest, long wave radio. Only a small portion of this is visible, called the visible spectrum and this occurs towards the middle of the range which lies between Ultraviolet and Infrared frequencies. Ultraviolet radiation is what burns the skin and can cause skin cancer. It is blocked by most types of glass and is partially reduced by the atmosphere especially the ozone layer. Infrared radiation is what provides the earth with heat and it is that which is trapped by green house gasses, carbon dioxide mainly and is causing global warming.

Infrared radiation is targeted by solar panels. This basically uses the energy generated by the radiation to heat water in pipes that flows and generates electricity. This can be used to charge a battery which could then power said LED lighting. As mentioned previously there is a dual nature to light. It consists of both a particle and a wave. It might help to think of the particles moving in a wave like pattern but the reality is more complex than that. The important thing to remember is that the light particle, the photon, is what is targeted by a solar cell. Read the rest of this entry »

26 Sep 2011

 

 

Rich Templeton,  Chairman, President and CEO Texas Instruments writes:

Dear Valued Customer,

In April I wrote to inform you of an agreement by which Texas Instruments would purchase National Semiconductor. Today, I’m happy to report, we have closed the deal, making Texas Instruments and National one company.

So what can our customers expect? Very simply, expect a company re-dedicated to delivering the products, the manufacturing, the sales support, and the value you need to win. Over the weeks and months ahead we intend to demonstrate the depth of our commitment to your business and how, together, TI and National can be a powerful partner with you. So stay tuned – we’re excited about the future and what it holds for you and us.

Thank you for choosing TI. I look forward to a great future together. You can learn more about the acquisition at www.ti.com/deliveringmore.

Texas Instruments Completes Acquisition of National Semiconductor - [Link]

26 Sep 2011

Laptop power chargers and USB cables always break at the same point and once they do, it’s not long before they stop working altogether.

Here are instructions to show you how to repair this problem quickly and very easily using sugru.

Why use sugru ?

  1. sugru will bond to the cable and the power block.
  2. sugru cures to a flexible silicone rubber which means that it is unlikely to break again.
  3. sugru is an electrical insulator.

How To Repair Damaged Cables - [Link]

26 Sep 2011

Daniel F. Butay & Michael T. Miller writes:

The design and implementation of a Maximum Peak Power Tracking system for a photovoltaic array using boost DC-DC converter topology is proposed. Using a closed-loop microprocessor control system, voltage and current are continuously monitored to determine the instantaneous power. Based on the power level calculated, an output pulse width modulation signal is used to continuously adjust the duty cycle of the converter to extract maximum power. Using a Thevenin power source as well as a solar panel simulator, system design testing confirms simulation of expected results and theoretical operation is obtained.

Maximum Peak Power Tracker  - [Link]



 
 
 

 

 

 

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