Software apps and online services
Hand tools and fabrication machines
The problem with the existing system is we are required to carry debit or credit card. Plus we have to remember PIN which often forgotten if not used for a long time. Many people keep simple password such as a birth year, ending or starting 4 digits of phone number, etc. which is very easy to crack if card gets into wrong hands. The second problem nowadays people tend to have multiple cards so this creates more trouble to remember more password PINs. If credit card stolen then you know its consequence.
Second, the most important risk is of skimmer. The criminal attach this skimmer device to ATM machine to steal your credit or debit card information from distant location.
So, to avoid the above mentioned problem, I proposed this prototype project which showcases how we can add extra layer of security to ATM transactions and reduce those headaches to some extent.
Let's jump to get started with the project.
Basic skills needed:
- Basic Circuit understanding
- Arduino Programming
- Soldering (optional if implementing project on breadboard)
1) Arduino IDE setup:Follow the Arduino official link below to install Arduino IDE on your respective OS:
Windows -> https://www.arduino.cc/en/Guide/Windows
Linux -> https://www.arduino.cc/en/Guide/Windows
Mac -> https://www.arduino.cc/en/Guide/Windows
Linux user can follow my video tutorial:
2. Installing Library:
For this project we need GT511C3 fingerprint module library which can be downloaded from link:
Download files, after this just extract and copy to libraries folder of your Arduino as shown in below image.
Make connection as shown in above circuit wiring diagram.
Now what you need to take care here, GT511C3 module works with supply 3.6 to 6 but it's TTL pin (Rx and Tx) are not 5V tolerant.
TX of scanner can be directly connected to Arduino digital pin but RX is connected via potential divider which helps to bring down 5V within range of 3.3V
You can make a resistor potential divider connection on the breadboard as shown in the above image. Or solder on general-purpose dot PCB to avoid loose connection. 2k is formed by connecting 1k + 1k in series. You can have different pair of resistor to make potential division or any 5V to 3.3V logic level converter .
Package project in suitable box and ready to proceed for programming.
Note: Sparkfun manufacturer of the GT511C3 fingerprint scanner has discontinued it. You can go with their latest GT-521F52 scanner which better version of it, this will also work since the similar library and TTL wiring.Coding and Testing
Upload Project code provided below to Arduino Uno and That's it ready to test. I have added comments in code for an explanation of each section, if still has any doubts then comment below.
Enrollment & Checking Part:
Balance Inquiry :
Cash Withdraw:Conclusions and Future Work Scope
So, we have seen how we can enhance the security level of the ATM machine to safeguard transactions with Biometric fingerprint and SMS mobile phone Technology. For the demo, I have use DC motor and serial terminal for debugging, but you can add keypad and screen to make it more portable. The application area is not limited to ATM machine it can be used for :- Home Security - Office or sensitive labs Security
Thanks!! Hope you like this project.