In this instructable i will teach you how to make a very cheap arduino safe without any servo or motor shield and it also displays the password on LCD and it is wireless too.
Step 1: Materials Required :
Arduino uno (I used uno but another work just fine)
LCD Display 16X2
4X4 Matrix Keypad
I2C interface adapter
CD rotor(you can buy it from a computer repairing shp)
RC transmitter (you can find it from a broken rc car)
Step 2: Wiring
FOR THE KEYPAD WIRING SEE THE ABOVE IMAGES.
FOR THE I2C ADAPTER WIRING SEE THE ABOVE IMAGE.
FOR THE TRANSMITTER AND RECIEVER WIRING:
Open the RC remote and connect the red wire with the DIGITAL PIN 13 of arduino and black wire to the GND
Then,Open the RC car you will find the reciever connect the + and - located on the reciever to the power source and then disconnect the wires connected to the back motor of the car and then connect it to the wires of the CD Rotor
Step 3: Scan the I2c Address
In order to enter the i2c address in the program you have to scan it from the code below if you already know it skip this step.
Step 4: The CODE
First of all you have to install the latest version of ARDUINO IDE software
Here's the link :
Then download all the libraries from the following links :
FOR KEYPAD : http://playground.arduino.cc/Code/Keypad#Download
FOR New liquid crystal or LCD : https://bitbucket.org/fmalpartida/new-liquidcrystal/downloads
FOR PASSWORD : http://playground.arduino.cc/Code/Password#Download
Finally the code :
Step 5: Testing
Here's my video of Arduino Safe
The password is "RV 7597494853" but you can change it anytime.
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