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Wednesday, October 26, 2011

OpenCV on android phones

Hi all

          Open Computer Vision (CV) library is compatible with android .We can download OpenCV for Android from following  link .

We will also get pre-compiled example apk files from  the following link

Take a look at this

Try it..

Tuesday, October 25, 2011

SSH for android

Hi all

       Here is an ssh client on android .Used to connect android phone and PC through SSH .

App name: ConnectBot

Give the ip of the Linux PC ,then it will connect to the terminal of Linux.

Take a look at this picture

Try it..

Bash for android

Hi all

       Here is the Terminal emulator on android phones .

Find Android terminal emulator on following link

Name of the app : Android Terminal emulator
Link :

Look at the picture

Try it...

Python for android :SL4A

Hi all

        I have seen a python intrepreter on android phones .Here is the link for this project 

SourceLair :A free Compiler collection app on for android phone

Hi all 

        I got an app for compiling C,CPP,Pascal and Fortran on android phones.The app is available in android market .App is named as SourceLair .

Try it...

Monday, October 24, 2011

DELL XCD 35 Review

Hi all
         Today i like to review Dell's smart phone called DELL XCD 35 .Recently i purchased this phone .
Here is the specs of this phone

Tech Specs

Operating System

    • Android 2.2 (Froyo)


  • ARM11, 600MHZ


  • GSM 900/1800/1900 MHz, UMTS 2100 MHz


  • 8.9cm(3.5 inch) 800*480 pixels WVGA resolution
    262K color (18 bit color) TFT
    Capacitive Touch screen


  • 3.2 MP Color CMOS with Auto focus


  • Flash: 512M
    Internal Memory: About 200 MB for user.
    Expandable with Micro SD memory card (up to 16GB)


  • Bluetooth™ with v2.1 with EDR
    Class 2 transmit power
    IEEE 802.11b/g compliant
    Internal WLAN antenna
    USB 2.0 with High Speed
    Micro-SD card access
    Support USB charging


  • 114mmx56mmx12.2mm

Advertised System Weight

  • 120g

Primary Battery

  • 1250mAh Li-ion

The phone will cost around RS:8000-10,500 .This is a very good phone for an intermediate user

Saturday, October 8, 2011

Mouse Controlling in Linux using Laser

Hi all

         Here is a code running on Ubuntu Linux which move the mouse cursor using laser point .The main library used for this code is XLib and Open CV.


#define SPACE XK_A        

#include <X11/Xlib.h>            
#include <X11/keysym.h> 

XKeyEvent createKeyEvent(Display *display, Window &win, Window &winRoot, bool press, int keycode, int modifiers)
   XKeyEvent event;
   event.display     = display;
   event.window      = win;
   event.root        = winRoot;
   event.subwindow   = None;
   event.time        = CurrentTime;
   event.x           = 1;
   event.y           = 1;
   event.x_root      = 1;
   event.y_root      = 1; 
   event.same_screen = True;
   event.keycode     = XKeysymToKeycode(display, keycode);
    event.state       = modifiers;
   return event;

CvCapture* VideoBuffer = cvCaptureFromCAM(CV_CAP_ANY);

uchar *Data;
int revert,Step,noPointerInterval = 0,i,j,k,XCordSum = 0,YCordSum = 0;
int RedPixelCount = 0,hold=0,noPointerFlag=0,blinkInterval=0,Width,Height;
  Display *display = XOpenDisplay(0);                           
  XKeyEvent event;                                       
  Window winRoot;                                        
  winRoot = XDefaultRootWindow(display);
  Window winFocus;                                       
  char num;
      printf("NO CAM FOUND!!!\n");
     IplImage* Frame=cvQueryFrame(VideoBuffer);

     Data=(uchar *)Frame->imageData;


                XWarpPointer(display, None, winRoot, 0, 0, 0, 0,(XCordSum/RedPixelCount)*2,(YCordSum/RedPixelCount)*2);

                XGetInputFocus(display, &winFocus, &revert);

           if(noPointerInterval<=10 && noPointerFlag!=0)


                                XGetInputFocus(display,        &winFocus, &revert);
                 event   =   createKeyEvent(display,   winFocus,   winRoot, true, SPACE, 0);
                 XSendEvent(event.display,   event.window,   True, KeyPressMask, (XEvent *)&event);  
                 event   =   createKeyEvent(display,   winFocus,   winRoot, false, SPACE, 0);
                 XSendEvent(event.display,   event.window,   True, KeyPressMask, (XEvent *)&event);



           if(noPointerInterval>10 && hold==0)
                  printf("\nNO pointer.");



Compiling Command

g++ `pkg-config opencv --cflags --libs` filename.cpp -o outputname



Saturday, October 1, 2011

LCD Clock using Arduino and Python

Hi all

         I made a simple LCD clock using Arduino .The code of Arduino and the Python for running the clock is given below .

Arduino Code

  LiquidCrystal Library - Serial Input
 Demonstrates the use a 16x2 LCD display.  The LiquidCrystal
 library works with all LCD displays that are compatible with the 
 Hitachi HD44780 driver. There are many of them out there,  and you  can usually tell them by the 16-pin interface.
 This sketch displays text sent over the serial port 
 (e.g. from the Serial Monitor) on an attached LCD.
 The circuit:
 * LCD RS pin to digital pin 12
 * LCD Enable pin to digital pin 11
 * LCD D4 pin to digital pin 5
 * LCD D5 pin to digital pin 4
 * LCD D6 pin to digital pin 3
 * LCD D7 pin to digital pin 2
 * LCD R/W pin to ground
 * 10K resistor:
 * ends to +5V and ground
 * wiper to LCD VO pin (pin 3)
 Library originally added 18 Apr 2008
 by David A. Mellis
 library modified 5 Jul 2009
 by Limor Fried (
 example added 9 Jul 2009
 by Tom Igoe 
 modified 22 Nov 2010
 by Tom Igoe
 This example code is in the public domain.
// include the library code:
#include <LiquidCrystal.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void setup(){
    // set up the LCD's number of columns and rows: 
  lcd.begin(16, 2);
  // initialize the serial communications:
void loop()
  // when characters arrive over the serial port...
  if (Serial.available()) {
    // wait a bit for the entire message to arrive
    // clear the screen
    // read all the available characters
    while (Serial.available() > 0) {
      // display each character to the LCD
This program outputs the serial date to LCD .
The link of circuit diagram is given below
Python code 

import serial
import time
import datetime
#Opening serial port
while 1:
        tot_time="Time:"+hour+":"+minute+":"+second+"   Date: "+day+":"+month+":"+year

Thank you guys..:)