An Exquisite Raspberry Pi Enclosure

There are countless types of enclosures available for the inexpensive credit card sized Single Board Computer – the Raspberry Pi, popularly known as the RBPi. All have their unique capabilities and advantages. Some are made of wood, some of paper while most others are made of plastic. The molded enclosure from Hammond Electronics is specifically designed to house the RBPi model B. The exquisitely molded container is shaped like a book and is available in black, grey and translucent blue. The Read more [...]

Meet the Prettier Raspberry Pi Model B+

Just as soon as you thought you knew as much as there is to know about the most popular single board computer, the tiny versatile Raspberry Pi or the RBPi, acquaint yourself to a prettier cousin. There is an update to the familiar RBPi Model B and it is called the RBPi Model B+. Raspberry Pi Foundation, the manufacturers of the RBPi, have incorporated several improvements requested by users in the new model. Although the RBPi Model B+ retains the same controller, has the same amount of RAM and Read more [...]

Is SMT Good for Precision Resistors?

Where precision resistors are concerned, a small size may not always be the perfect answer and SMT has its trade-offs. Power density in surface-mount chip resistors is higher than in through-hole parts, which results in chip resistors running hotter. Surface area in the case of through-hole resistors is higher, allowing them to dissipate internal heat to the surrounding air, while SMT devices mostly dissipate through the PCB. That leads to heat build-up in the system, affecting all the components. Read more [...]

What do Certified Ethical Hackers do?

To know the taste of a specific food item, you have to put it in your mouth. To know how durable an item is, you need to subject it to a battery of tests and then compute its MTBF. As industry moves from traditional devices to using more modern, connected devices and systems that are always on, security is seen as a major obsession. People need to know how secure their network is against external attacks. However, just as an arch can withstand a good amount of external load, but crumbles easily Read more [...]

What is a diskless computing system?

Today's data centers and Hybrid Compute Clusters or HPC work with thousands of computers. With every computer having its own operating system, even a team of highly skilled administrators would find it hard to keep up with the demands required for maintaining each system. Typically, admins strain to keep the myriad types of computers they have, all functioning, as they should. Sysadmins must duplicate their efforts over and over, as they install new systems with new system software and handle configuration Read more [...]

What is the difference between Linux and Android

Those of you who use the Linux OS on their desktops know that it is vastly different from the Android OS typically used on the mobile phone or tablet. One of the glaring differences one notices in the two OSs is that Android is geared heavily towards the touch operation, whereas Linux is limited to operations with a keyboard and mouse. However, both operating systems have a common origin and share the same kernel. Linux can be best defined as an operating system suitable for running on a fixed Read more [...]

Talk To Your Raspberry Pi through an FTDI Breakout Board

You do not really need a monitor and a keyboard for logging into the tiny credit card sized single board computer, the famous Raspberry Pi or RBPi; there are several ways to do that. One of the very simple ways is to listen in on two of the serial communication monitoring pins on the GPIO header of the RBPi. Manufacturers of most computers have now given up on including serial ports on their products in favor of the more Universal Serial Bus or USB. However, connecting the serial pins on the RBPi Read more [...]

Use F-RAM to Replace SD Card in Raspberry Pi

For those who use their Raspberry Pi very frequently, there is always the risk of wearing out the SD card. This tiny, inexpensive, credit card sized, single board computer – the Raspberry Pi – or RBPi, boots and runs a Linux Operating System held on an SD card. Therefore, if your RBPi has to boot often, you run a database on the SBC or use virtual swap space that resides on your SD card, the life of the SD card reduces very fast. In fact, any time you use the SD card, for example, for data Read more [...]

Transfer Power Efficiently – Through Superconductors

At some point in our daily lives, almost all of us have heard of superconductors. These materials conduct electricity very well – with almost zero resistance. In comparison with normal wires carrying electricity, superconductors - because they offer no resistance - are almost loss-free. The caveat – superconductors need to be cooled to very low temperatures, making them almost impossible to operate at regular operating temperatures. However, the situation may be about to change. Argonne National Read more [...]

What are Class D Amplifiers

The class AB type of audio amplifiers has been around for a long time, and most high quality ones are still typically class AB. Two things plague this excellently performing device – a quiescent bias current to keep the output semiconductors in their active region of operation and an operating efficiency that refuses to rise above 75%. In reality, this type of audio amplifiers operates with a compromise between frequency response, power output, low distortion and efficiency. Although special efforts Read more [...]