Digital security system
This presentation is the property of its rightful owner.
Sponsored Links
1 / 9

DIGITAL SECURITY SYSTEM PowerPoint PPT Presentation


  • 85 Views
  • Uploaded on
  • Presentation posted in: General

DIGITAL SECURITY SYSTEM. By R.Sree Harsha M.Sai Sudeep Reddy. What is Digital Security?. It is a type of security which can be used to prevent intruders from entering our home. The security system will sound an alert if there an attempt of break-in.

Download Presentation

DIGITAL SECURITY SYSTEM

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Digital security system

DIGITAL SECURITY SYSTEM

By

R.SreeHarsha

M.SaiSudeep Reddy


What is digital security

What is Digital Security?

  • It is a type of security which can be used to prevent intruders from entering our home.

  • The security system will sound an alert if there an attempt of break-in.

  • This is mainly used to minimize chances of losing possessions which can be traumatic and expensive.

  • When the intruder breaks in, the alarm will sound and most times will scare them off.

  • Limitations : The alarm will sound even if the user or his friends enter his home, providing an inconvenience to the user.


Why is this needed

Why is this needed?


Circuit diagram

Circuit Diagram


Electronic components

Electronic Components

  • 5 Resistors: One 470 ῼ

    One 1K ῼ

    Three 47K ῼ resistors

  • Semi-Conductors: IC 1 – CD4511

    IC 2 – CD4000

    Q1 – BC 548

    Display – LTS 543

  • Miscellaneous: Two one way switches

    BZ – Buzzer

    IC Socket – 16 PIN-1 , 14 PIN-1

    PCB


Circuit construction

Circuit Construction

  • Wire loops 1,2 and 4 are connected to A,B and C inputs of the 7-segment decoder (IC 4511) while the D input of IC1 is grounded permanently.

  • The loops are also connected to a dual 3-input NOR gate which is then connected to a NOT gate to activate the alarm.

  • The 7-segment decoder is connected to a common cathode 7-segment display(LTS 543).


Brief mechanism of circuit

Brief Mechanism of Circuit

  • LTS 543 displays whether the loops are intact or not.

  • When the loops are intact, all the three inputs of the gate N1 remain low to give a high output.

  • This high output is further given to the NOT gate and as a result the final output remains low. This keeps the transistor in cut-off position and hence the buzzer does not sound.

  • When any loop is broken, the output of the N1 gate goes low.

  • As the input of the NOT gate is low, the final output will be high.

  • As the final output is high, the transistor conducts and the buzzer sounds to alarm the owner.


Digital security system

  • If the loop 1 is broken, the 7-segment display will show ‘1’.

  • Similarly if the loop 4 is broken, it shows ‘4’.

  • If both the loops 1 and 4 are broken, then it shows ‘5’ (1+4).


Digital security system

THANK YOU


  • Login