Fingerprint & Keypad Safe

The fingerprint recognition safe is a safe which uses biometrics and a keypad to provide extra security for a “safe”. The safe will only open when both the password for the keypad and the fingerprint matches.

Engineer

Anirudh V.

Area of Interest

ie Electrical Engineering

School

Fremont High School

Grade

Rising Sophmore

Second Milestone:

 For my second milestone, I got my fingerprint sensor to recognize my fingerprint and servo motor to turn 90 degrees when it does. When I scan my fingerprint the servo motor will turn  90 degrees and will be in an open position. When the safe is open, you have 15 seconds to take whatever you want out of the safe and then servo motor will return to its original locked position. some things I learned through the process is that the servo motor has three wires one is connected to an analog output pin, one is connected to ground, and one’s connected to power. The fingerprint sensor has five wires two of which are not connected. The red wire is connected to the 5V power, the green and white wires are connected to analog input pins and the black wire is connected to ground. Some of my struggles I faced through the process of achieving my second milestone were that originally my fingerprint
sensor was not recognizing my fingerprint and this was because the variable in my code was incorrect and I edited my code to correct that variable the fingerprint sensor worked. another problem I faced was that the servo motor kept turning before I even scan the fingerprint and this was because I didn’t include an if statement so when I added the if statement the scanner recognized my fingerprint and the servo motor turned.  For my Final milestone, I’m going to show you a completed product of the fingerprint sensor including the hardware aspect of the fingerprint sensor safe.

Struggles

Some of my struggles I faced through the process of achieving my second milestone were that originally my fingerprint sensor was not recognizing my fingerprint and this was because the variable in my code was incorrect and I edited my code to correct that variable the fingerprint sensor worked. another problem I faced was that the servo motor kept turning before I even scan the fingerprint and this was because I didn’t include an if statement so when I added the if statement the scanner recognized my fingerprint and the servo motor turned.  

Goals for Next Milestone

For my Final milestone, I’m going to show you a completed product of the fingerprint sensor including the hardware aspect of the fingerprint sensor safe.

What I learned

Some things I learned through the process is that the servo motor has three wires one is connected to an analog output pin, one is connected to ground, and one’s connected to power. The fingerprint sensor has five wires two of which are not connected. The red wire is connected to the 5V power, the green and white wires are connected to analog input pins and the black wire is connected to ground. 

First Milestone: For my first milestone, I got my keypad to print the numbers I type.  Some things I learned through the process are coding in arduino and the hardware aspect of arduino.  For my next milestone I would like to get the fingerprint sensor to recognize my fingerprint and turn the servo motor from a locked state to an open state.

Two of my main struggles while trying to accomplish my first milestone were that I had to use the online version of arduino ide which set me back a couple days and another struggle was that the top row on the keypad wasn’t working. After countless hours of testing out different solutions to the problem i figured out that the problem was that I had reversed the pin order on the arduino.

Starter Project

For my starter project I chose the Simon Says PCB game. The Simon says game was a PCB board on which I needed to assemble the pieces together by soldering. Some things I learned through the process of making my Simon Says game is that a microprocessor is the motherboard of the entire PCB, an LED is a light emitting diode and a diode basically allows current to flow only in one direction. Some other things I learned are that capacitors store energy and the resistor can control current flow. One challenge I faced was that originally after assembling all the parts together the game wasn’t working and I found out this is because the battery clamps were not all the way together. After fixing this issue the game worked perfectly and I look forward to starting on my main project the Fingerprint recognition and keypad safe.

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