Programmable Security Lock Using Arduino

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Introduction: Programmable Security Lock Using Arduino

About: Mitu Raj -- Just a Hobbyst and Learner -- Chip Designer -- Software Developer -- Physics and Mathematics Enthusiast

This is my first blog here. I am presenting here an Arduino based programmable security lock (PSL) for locking electronic appliances. The PSL circuit is used to switch on/activate/unlock an AC/DC appliance on external power supply, based on passwords. The appliance can be unlocked only if the correct password is fed.

- The numeric password can be of any length of our choice ( max.length 15). Initial password is programmed into EEPROM of UNO.

- Password programmable by SMS from a unique authorised number. The authorized number is also initially programmed into EEPROM.

- SMS Commands, Alerts , Maximum 3 wrong attempts , Emergency freeze mode for increased security.

- Developer : Mitu Raj

Supplies

Arduino UNO, GSM-900 Module, LCD, LEDs, Keypad, Jumper wires, bread board/PCB.

Step 1: Components Required

1) Arduino UNO

2) SIM 900A GSM module

3) 4x4 matrix keypad

4) 5V Relay Module

5) 16x2 LCD display

Step 2: Circuit Connection

1) 4x4 Keypad pins 1-8 are connected to D2-D9 pins of Arduino. If you get incorrect response from the keypad , it maybe because you connected it in the reverse order. Take a note of this.

2) SIM 900A GSM module's RX and TX are connected to D11, D10 respectively. We use these pins as software serial . GND of GSM is connected to Arduino GND .

3) Use 9V 2A adapter as power supply to GSM module. 2A is preferred over 1A rated adapter. The same may be used to power the Arduino too. Your wish.

4) The 5V relay module is connected to D12 pin. and "Busy" status LED . Choose the relay wisely ( generally capable to switch 24V DC/ 240V AC 5A rating).

5) Interface the LCD display as in the circuit diagram shown.

You are ready to GO !!!

Note : The Led in 13th pin is connected in reverse manner in the circuit diagram . please connect the positive of the Led to the Vcc of the arduino , and the negative to D13 via the resistor . Also connect the analog pins to LCD in the reverse order to that in the circuit diagram .

Note : The phone number is 12 digits length total in my code, including country code...If it differs, change accordingly in the code after understanding the code.

Step 3: Notes

Implement individual Keypad test , GSM test and testbench in Arduino before you proceed to the complete circuit implementation ( go through guidelines too in main code folder ). The necessary files and instructions have been attached with this. Also make sure that your Arduino IDE contains keypad.h , softwareserial.h libraries.

link to my paper :

http://www.iject.org/vol8/issue1/9-mitu-raj


For any queries, feel free to contact me:
Mitu Raj

follow me:https://www.instructables.com/member/AmCoder/

mail: iammituraj@gmail.com

Attachments

Step 4:

1 Person Made This Project!

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24 Comments

0
SangarN
SangarN

7 months ago

I want to get rar file password please

0
AmCoder
AmCoder

Reply 6 months ago

inbox/mail

0
amobett.ab
amobett.ab

6 months ago

can i have the rar password please

0
AmCoder
AmCoder

Reply 6 months ago

inbox/mail

0
AmCoder
AmCoder

5 years ago

u are welCome :)

0
SangarN
SangarN

Reply 7 months ago

hi my friend
you can send me password ?
thank you so much

0
AmCoder
AmCoder

Reply 11 months ago

done

0
AmCoder
AmCoder

Reply 1 year ago

done

0
AmCoder
AmCoder

Reply 1 year ago

doen bro

0
KyawS19
KyawS19

2 years ago

I want to get rar file password please

0
shubham poul
shubham poul

2 years ago

can i have code

0
AmCoder
AmCoder

Reply 2 years ago

hope u got it

0
mmjb585
mmjb585

2 years ago

pin please

0
AmCoder
AmCoder

Reply 4 years ago

please contact in mail