JAJAH Offers 30 Minutes FREE Calling India & Aboard

 

JAJAH is a new type of phone company. We are dedicated to providing our customers with phone calls at a better price. It’s that simple. “The internet has touched us all. It’s changed the way we do everyday things. It’s changed the way we stay informed, the way we shop for the products we want, even the way we find and listen to music. In the same way, JAJAH will change the way we all use the telephone”.

How to Lock the folders

You can lock and unlock your folder with this simple trick !

Procedure :1. Make a folder on the desktop and name it as “folder”
2. Now, open notepad and write ren folder folder.{21EC2020-3AEA-1069-A2DD-08002B30309D} and now (Notepad Menu) File>save as.
3. In the ‘save as’ name it as lock.bat and click save ! (Save it on Desktop)
4. Now, again open notepad again and write ren folder.{21EC2020-3AEA-1069-A2DD-08002B30309D} folder and now (Notepad Menu) File>save as.
5. In the ‘save as’ name it as key.bat and click save ! (Save it on Desktop)
6. Now, double click lock.bat to lock the folder and now if you open your folder, control panel will open up !
7. Now, double click key.bat to open the folder and now if you open your folder, you can access your data inside the folder again !
8. Lock your folder and hide the key.bat somewhere else on your hard disk !
9. Whenever you want to open your folder just paste the key.bat on desktop and open your folder using it !

Temperature controller using DS1820 and LCD display

This Project is used to indicate the temperature and it is also used as controller. The system will get the temperature from the DS1820 and it will display the temperature over the LCD display. There are 2 preset levels, one is low preset and the other is High preset. The temperature was compared with the value stored by the user and if the temperature goes beyond the High Preset temperature then an relay is switched ON until the temperature comes below the Low preset temperature.

The System is fully controlled by the microcontroller AT89S52. It is a popular 8 bit microcontroller. The circuit consists of four switches, in which two buttons are used to increment and decrement the High limit temperature value and the other two buttons are used to increment and decrement the Low limit temperature value.

The temperature limits are stored inside the EEPROM, since 89s52 dont have inbuilt eeprom. The IC 24C02 is the eeprom chip and it is connected to the microcontroller through the I2C bus. The DS1820 is the temperature sensor chip which is connected to the microcontroller through 1 wire bus.


Download the microcontroller code and PC application: Temperature-controller