Raspberry Pi accessories from Microstack

If you are looking for accessories for your tiny, credit card sized single board computer, the Raspberry Pi or RBPi, you now have a series of them from the distributer element14. This Microstack range of accessories allows all levels of users to create and prototype physical devices simply and quickly. Most popular among the Microstack accessories are the GPS positioning and accelerometer. Microstack claims that its modules are the “building blocks for the Internet of Things for All”. The Read more [...]

Common Mode Signals and the Twisted Pair

People dealing with networking and instrumentation would have often come across the term “twisted pair”. This usually consists of two insulated wires twisted tightly together and is the most common method used to prevent noise on the wires from being carried into a device. This applies to most cables carrying signals related to communication on RS-485, RS-422, computer-network, video, audio and telephones systems. In technical terms, these signals are known as Common Mode Signals. When you Read more [...]

Raspberry Pi Handles Extreme Machines

In general, we know of two types of internal combustion engines used in vehicles – Gasoline and Diesel. The gasoline engine relies on electric sparks for igniting its air-fuel mixture, while the diesel engine relies on heat and compression to do the same. Introduction of new types of renewable fuels such as biodiesel, bioethanol and Hydrogen are leading to newer types of internal combustion engines such as those utilizing HCCI or Homogeneous Charge Compression Ignition. HCCI uses a type of internal Read more [...]

Raspberry Pi drives photon elephant

You are looking for the best way to control your 3D printer and turn it into a smartprinter. If you are not averse to using a browser-based control panel that will allow you to stream from a webcam, start, pause and resume print jobs while slicing your STL files, you may consider the Photon Elephant. The Photon Elephant uses the tiny, low-cost, credit card sized, single board computer – the Raspberry Pi or RBPi – to drive the motor controllers of your printer. A conventional SDK or Software Read more [...]

How does an Android process sense motion?

The Android 4.4 Operating System from Google is able to track your motion in real-time. You can test this with the Google-map application when traveling – your current position as shown on the map will shift as you move. Although this was feature available earlier as well, Google has mandated that 4.4 version onwards, Android will be using this function in the background while it has turned the application processor off. Google has introduced this change to save battery life. To comply with Read more [...]

Why is Li-Fi better than Wi-Fi?

Imagine wandering through an art gallery with your PDA. As you reach an interesting canvas, your PDA starts downloading information about the painting. When you move to another, your PDA displays content relative to the current piece of art. This is called content fencing – tailoring information to specific locations so that users receive information relevant to their current location. Content fencing is impossible to achieve with Wi-Fi – radio waves have a far greater spreading power. However, Read more [...]

Connecting to the web via LEDs: Li-Fi

Connecting to the Internet is best done through copper wire or high-speed wireless connections. Not many are aware of an additional method – using light beams. This is accomplished not by the usual optical fiber stuff, but by using LEDs. Communication with lights is nothing new - it has been done before. The Scottish scientist, Sir Alexander Graham Bell had invented an arsenal of instruments for communication and these included Photophones. The first instruments to use light for communication Read more [...]

Choose the color of your led

To indicate the hue of a specific type of light source, the standard procedure is to measure its color temperature in degrees Kelvin. For example, for suggesting realistic colors of lights in a 3D scene, you can use a Color Temperature chart. Typically, the white balance of a video camera or a film stock is used as the base for relating visible colors. For this, two settings are used most commonly. The first is the indoor color balance, set at 3200K and the other is the daylight color balance, set Read more [...]

Let Raspberry Pi do your Calling and Answering

In certain projects or experiments where you are monitoring an entity such as temperature or pressure, it is impractical to be physically present for any length of time. However, it may be important for you to know when the measured entity breaches a high or a low set point. For example, if something is not working out as it should – say temperature or humidity too high – you may wish to start or control another activity rather quickly to compensate. In such cases, the handy, credit card sized Read more [...]

Superconduction at nanowire levels

Superconduction At Nanowire Levels Passing electricity through any conductor generates heat. Even the best conductor such as a copper wire offers some resistance to electrons passing through it. As electrons move through the ordinary conductor, they occasionally collide with its atoms and this releases energy as heat. Cooling ordinary materials to very low temperatures changes the scenario drastically. Cold temperature dampens the Brownian motion of their atoms, allowing electrons to zip past Read more [...]