Monday, November 8, 2010

8051 Based code Lock With dial up



8051 Based code Lock 8051 Based code Lock
More and more devices are coming every day to protect your house and property from thiefs .Present project is also one of them. The project presented here is based on world’s most powerful intel’s mcs-51 family of microcontroller atmel at89c51.
8051 Based code Lock With dial up Block Diagram  Block Diagram
When ever somebody tries to open your latch by entering wrong numbers.
After three wrong retries. The project takes the following action
1) Sounds an siron to attract your or public attention .
2) It will call a telephone number you wanted the device should call you in such case.
3) I will make 5 attempts to call you at the interval of one second and deliver the emergency message stored in speech ic.
4) During this operation the key board will get lock and will not except any key press.
5) Key lock will be indicated by an led LD4 connected on top of kaypad, will glow permanently till the time keypad is lock.
6) Key pad will get unlock only after 5 retries of the phone.
The project comprises of the following blocks:
• Microcontroller
• Password store key
• Telephone store key
• Indication leds
• 4×3 matrix key pad
• serial eprom to store the password and telephone number.
• Speech circuit
• Amplifier circuit
• Off-hook circuit
• Dialer circuit
• Latch relay
• Power supply

1 comment:

  1. please can u send me complete details of this project i.e circuit diagram,programming9in c as well as hex) and list of components to me as soon as possible..i wanna simulate it to check whether des project will work or not...if possible please make it as early u can...
    my e-mail id is:
    me.ankita22@gmail.com

    ReplyDelete