Author - Vivek Kartha

Using Switch with Raspberry Pi – Python

I hope that you already go through our tutorial, LED Blinking using Raspberry Pi. Detecting switch status is one of the basic step in learning Raspberry Pi GPIO operations. Here we using Python programming language. I hope that you already installed Python GPIO Library in your Raspberry Pi, if not please follow our first tutorial LED Blinking using Raspberry Pi. Raspberry Pi GPIO Pin Out Raspberry Pi GPIO layout Pull Up and Pull Down Raspberry Pi has internal Pull Up and Pull Down resistors which can...

Using Raspberry Pi through VNC

Virtual Network Computing (VNC), is a graphical desktop sharing system used to remotely control a computer's desktop from another computer. It uses Remote Frame Buffer Protocol (RFB). It transmits keyboard strokes and mouse movement from the controller to the remote host and relays back the graphical screen updates from the host, over a network like Ethernet. Installing a VNC server like TightVNC on Raspberry Pi enables the user to remotely access the desktop of Pi and perform necessary operations. This...

Accessing Raspberry Pi through SSH

SSH stands for Secure Shell. It is a secure channel created over an insecure network. The channel consists of a server and a client. This channel uses public key cryptography and can be used for secure transmission of passwords, remote log in, command execution etc.. SSH can be used when we cannot physically access the Raspberry Pi due to various reasons like the USB ports are engaged or the board is in a remote location. This method also minimizes hassle...

Led Blinking using Raspberry Pi – Python

Led blinking is one of the beginner circuits which helps one to get acquainted with GPIO pins of Raspberry Pi. Here we use Python language to write the code for blinking Led at one second intervals. Components required One led 100 ohm resistor Jumper cables Raspberry Pi GPIO Specifications Output Voltage : 3.3V Maximum Output Current : 16mA per pin with total current from all pins not exceeding 50mA For controlling a Led using Raspberry Pi, both python and the GPIO library is needed. Installing Python GPIO Library Note: Python...

Siren Generator using IC UM3561

IC UM3561 is a CMOS LSI IC commonly used in alarm and toy applications. It is able to generate Police Siren, Ambulance Siren, Fire Engine Siren and Machine Gun Sound just by changing simple connections. It is a low cost and low power IC which can work down to 2.4V. We need only a few additional components as this Integrate Circuits has built in oscillator and selector circuits.  About IC UM3561 IC UM3561 - Block Diagram Basic blocks of IC UM3561 are...

Official Belle update to reach users in ‘early 2012’.

Symbian one of the most successful smartphone operating systems ever produced will get its next version on some  Nokia devices (which were previously running Symbian Anna and ^3)  around February 2012.   The update will be available to existing smartphones such as N8, E7, X7, C6-01, C7, Oro, E6, and Nokia 500. Symbian Belle was first seen with the release of Nokia 600, 700 and 701. From then it has been receiving good reviews and feedback.

After low cost tablets now it’s low cost 4G.

After reports of a 4G tablet priced around Rs.3500 scheduled to launched by 2012 end, Reliance Industries Limited is now bundling 4G plans for as low as Rs.10/1GB with it. As of present RIL is the exclusive pan-India 4G license holder. The services are based on LTE technology which till now has only been tested in developed markets. RIL has shelled out about Rs13000 for this spectrum. The Service can be accessed through USB sticks, WiFi modems and any other gadget having 4G...

Amazon’s enters the tablet market with Kindle fire

After the huge success in e-book industry through its e-book reader kindle, amazon is now offering a new product to customers. Kindle Fire is an android based tablet which seamlessly connects with amazon's services and offers unlimited cloud storage. It has a 7-inch screen identical to those used in apple devices through which the user can view 18 million movies, TV shows, songs, magazines, and books all available at amazon's website. It also includes the amazon's silk browser which...