How to Change the Baudrate of Raspberry Pi USART

Default boudrate of Raspberry Pi USART available in GPIO is 115200. To use this serial port for communicating with Slow microcontrollers Like Arduino and PIC  you need some modifications. For example if you want to change Raspberry Pi USART Boudrate to 9600:

Fist You change the  console baudrate:
To change the console baudrate, edit /boot/cmdline.txt to look like this (this is all in single line):

dwc_otg.lpm_enable=0 console=ttyAMA0,9600 kgdboc=ttyAMA0,9600 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait

Then  edit /etc/inittab to change the baudrate of the getty (you should find a line with baudrate of 115200, change that number to 9600):

2:23:respawn:/sbin/getty -L ttyAMA0 9600 vt100

Restart the system. 

Raspberry pi Trouble Shooting: RED Power LED is Blinking

 Raspberry pi Trouble Shooting: RED Power LED is Blinking

The Red Power LED is directly connected to 3.3V Power supply rail od Raspberry Pi. So it should never Blink. If it is blinking , it means the 5V is dropping out. So change the power supply.

Solution: Change Power Supply with rating 5V,1A (5V, 700ma As per specs)

Check the voltage between Tp1  and Tp2 ( Two points you can see in the board component side.

How to set Password in Raspberry Pi (Raspbian)

The Default Password of  Raspberry Pi image of Debian Squeeze, Wheezy is
        
           username: pi
           password: raspberry 

Now How to Change your password :

Type 

pi@raspberrypi: ~$ passwd

(current) UNIX password: raspberry   # default (Current) Password

Enter new UNIX password: newpassword   # Your New Password Type here

Retype new UNIX password: newpasssword   #Repeat Your New Password.

45 Gram Linux Based Computer Raspberry Pi - Overview

45 Gram Personal Computer Raspberry Pi - Overview

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What is Raspberry Pi?

Raspberry Pi is a USD $35.00(Approx.Rs.2500/-) credit card sized single board computer with 256 MB RAM, 2 USB Ports, One HDMI Port, 3.5mm Audio Jack, Composit Video out for Connecting TV as Display Device, SD Card Slot, Ethernet Port and GPIO port for Electronics and Robotics Projects. It’s a capable little PC which can be used for many of the things that your desktop PC does, like spreadsheets, word-processing and games. It also plays high-definition video. The Raspberry Pi measures 8.5cm x 5.4cm, It weighs 45g.

What Peripherals Are Required for the Raspberry Pi SBC?

• +5V/700ma cell phone battery charger with micro‐USB cable
• SD‐Memory Card (2GB minimum) with a Linux OS Image installed
• USB Keyboard & USB Mouse
• HDMI cable or RCA Video Cable
• Display with either an HDMI, DVI, or Composite Video input
• Ethernet LAN Cable with RJ‐45 Connectors

Supporting Operating Systems

Debian 6 Linux

Arch Linux

Fedora 14 Remix

Android