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Door Security System Circuit Diagram

Door Security System Circuit Diagram. Hey readers, we are back with another new article on arduino and rfid reader module. In this project, we will enter a password using the keypad to open the door lock using servo motor.

firealarmaddressablesystemwiringdiagrampdfnew
firealarmaddressablesystemwiringdiagrampdfnew from www.bengalss.com

For connecting the keypad with the. This project is useful in the security appliances and you can also install it in your homes and offices. When the switch s1 is pressed, the diode d1 connected to it begins to conduct, and the transistors t1 and t2, which are connected to the resistor, begin to conduct.

The Arduino Is The Brain Of The Project, That Controls The Whole System.


If the password is wrong then door remains closed and displays “wrong password” on lcd. When a low state input voltage is applied to the reset pin. The laser beam illuminates the face of photo transistor and starts conducting the voltage.

When The Switch S1 Is Pressed, The Diode D1 Connected To It Begins To Conduct, And The Transistors T1 And T2, Which Are Connected To The Resistor, Begin To Conduct.


Non inverting input receives a variable voltage based on the conduction of t1. In this circuit, we use 8051 microcontroller. Door alarm circuit diagram using ic 555.

Here Is An Electronic Security Code Based Door Locking System Circuit Diagram, Working And Applications.


As shown in the sliding door circuit diagram above, it consists of a bridge circuit which contains transistor t1 to t4, depending on the logic level at the bases of t1 with t3 or t2 with t4, it can determine whether the motor is. Here, one or more ‘danger’ sensing units are placed at the front of the system and generate some kind of electrical output when danger is sensed. There are many security systems use a closed loop of wires and switches arranged so that whenever a door or window is opened, the loop will be broken and the alarm will sound.

One Might Need A Light Barrier Or Similar Device That Can Transmit A Positive Pulse Of Suitable Length When A Person Is Approaching Near The Door.


The fundamental standard of this circuit is that the door lock only opens when the switches. In this project we are using normally open type. The entered password is compared with the known password.

When The Switch S1 Is Pressed Diode D1 Which Is Linked With It Starts Conducting As The Transistor T1.


The output can be connected to drive the relay to open the door (usually using motor). An obvious problem is that someone can tamper with the system, short out the loop, and later on, come back and. The 555 ic has an active low state reset.

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