Introduction: Voice Controlled Locking System
The Voice Controlled Locking System, is an automated locking system, using bluetooth as an intermediate for communication between Arduino and your Android phone. The Voice controlled locking system, unlocks when you say the password as set by you ( I have set it as 'instructables' ) and locks on saying 'lock'. The Voice controlled lock allows you to unlock and lock you drawer or wardrobe, automatically from a range of about 10 Meters without even touching it. Just open the app, and say the password and in a touch of a button you have opened your drawer/wardrobe.
I have design the lock or the latch as per my study table drawer. That can be customised as per need by just changing the latch head from the motor shaft.
NOTE: THIS DESIGN IS IN PROTOTYPE PHASE AND CANNOT GUARANTY COMPLETE SAFETY AND SECURITY. I WILL NOT BE RESPONSIBLE FOR ANY LOSS CAUSED.
Step 1: Parts Required
1) Arduino UNO
2) Arduino Pro mini 5v 16mhz
3) L293D motor driver ( Not needed if using a servo )
1) Bluetooth module HC 05
1)DC Geared motor 100 RPM/ 9g servo motor
2) 16x2 lcd display(optional)
1) 5V 200 ma DC adapter
The other misc. parts include-
1) Aluminium piece (10x2x0.2 cm) for the lock.
Step 2: Connections
BLUTOOTH MODULE - ARDUINO PRO MINI
Rx - Tx
Tx - Rx
5v - Vcc
GND - GND
**MAKE SURE, WHILE UPLOADING THE CODE, DISCONNECT THE TX AND RX PINS.
ARDUINO PRO MINI - MOTOR DRIVER
PIN 6 - In1 or PIN 2 of L293D ( if connecting directly to the IC)
PIN 7 - In2 or PIN 6 of L293D ( if connecting directly to the IC)
PIN8 - ENABLE PIN 1
5V - VCC
MOTOR DRIVER - MOTOR
Motor input 1 - Terminal 1
Motor input 2 - Terminal 2
Step 4: Uploading Code to Arduino Pro Mini
A program cannot be directly uploaded to the Arduino Pro mini. There are mainly two ways to upload a code to the Pro mini-
1) Using the programming board,
2) Via Arduino Uno.
I have programmed Pro mini Via Arduino UNO. To do so, first, very care fully remove the Ic on the Arduino Uno. Then on the Arduino IDE and change the board from UNO to Pro mini.
Tools > Boards > Arduino Pro or Pro mini
After doing this, the bottom right corner of your IDE will now display the board as- Arduino Pro or Pro mini ATmega 328 (5v, 16 Mhz ).
Now connect your pro mini to Uno-
PRO MINI - UNO
DTR - Reset
Vcc - 5v
GND - GND
Rx - Rx
Tx - Tx
After this, connect Arduino UNO using the USB Cable to your laptop/PC and upload the code the same way it is done for UNO.
Step 5: Writing the Code for Arduino and Working
- The code/program given below for the locking system includes the code for a 16x2 lcd display. Using it is completely optional and can be skipped without making any changes to the code. The program is very basic and easy to understand.
Step 6: Testing the Code With Arduino UNO
Before uploading the code to Pro mini, I decided to test the program on UNO to just make sure, the program was working perfectly.
The results were great, the code worked as per expectations and here's a video of the test-
Step 7: Setting the Passcode and Downloading the App.
The password can be set through the following command-
if(voice == "*password")
To change the password, just change the word in the inverted comas. DO NOT FORGET TO PUT THE STAR * BEFORE THE WORD
Downloading the app
Download The App :- Android Meets Robots : Voice
this app is free to download from the play store.