Week 7

Ideation

Tell us about your assignment's idea for this week. Why do you care about this idea? What inspired you? (Please include images or links to sources of inspiration)

This week's idea is to create a smart program controlled by the Arduino, which receives a specific reading and then does a specific thing.

My idea for this week is a small safe that works with Arduino and the password is entered via the keypad to keep your things safe.

Tool Chain

Which software/machines/materials did you use in the assignment? Why?

I will use Tinkercad to simulate the circuit before you send it to the breadboard

I will use the Arduino IDE to upload the code to the Arduino

For the electrical circuit

Jumper Wires.

Arduino

keypad 4*4

on/of switch : To open and close.

Servo Motor to open and close

Small breadboard: To connect the circuit.

Adaptor 9V :The source of electricity.

Buzzer to make a sound

For the body

I will use a hot glue gun to glue the cardboard and make the body.

I will use scissors to cut the cardboard to make the body.

I will use cardboard to make the body.

Design/Preparation Process

Explain the design and/or preparation process of your assignment. How did you use the tool or software to design and/or prepare your assignment before fabrication/implementation?

How my device works, I will use the keypad to enter the password which will be read by the Arduino, and by the Arduino if the password is correct the safe will open by rotating the servo motor and a light sound will be made by the buzzer, and if it is wrong the safe will not open and a loud sound will be made, and I added a close and open button to control the entire circuit if it is closed nothing of what I mentioned will happen and a message will appear that the button is closed

I started connecting the negative of the Arduino to the vertical lines of the board ,Then I connected the keypad to the Arduino as shown in the picture.

Then I connected the negative and positive of the servo motor to the negative and positive of the Arduino on the board, and connected the third terminal to one of the Arduino pins to control the motor via the Arduino.

Fourth, I connected Buzzer, makes a soft sound when the safe is opened, and a louder sound when an incorrect password is entered.

I connected the positive of the Buzzer to one of the Arduino pins and connected the negative to the negative of the Arduino on the board

Then, I connected On/Off switch, to control the circut

I connected one of it's leg to one of the Arduino pins and connected another to the negative of the Arduino on the board

Screen Recording 2025-02-13 041536.mp4

Simulating circuit

Development/Implementation Process

Explain the development/implementation process of your assignment. How did you use the machine/tool to manufacture or implement the design of your assignment?

Coding

First I started by defining the libraries that I would need in the code, which are a library for the servo and a library for the keypad, I defined a variable and put the values of the keypad in it, then I wrote some defined strings to use some codes from the keypad library, then I defined a variable to store the password and defined another to verify that the password was entered by the user, I defined another variable called angle that I would use for the servo motor, and defined another variable for time (I got some help from Google of course) :) for this particular variable

As for the set-up, I defined the servo pin, and the button and the buzzer , and I made the servo at an angle of 0.

As for the code that will be repeated, I had two basic things. If the button is open, the following will be done: First, get the keypad reading. Second, store it in the variable. Then, check if the entered password matches the password. The following is done: The servo rotates until it reaches a 90 degree angle, which opens the safe with a light sound from the buzzer. Otherwise, a loud sound is made and the servo motor does not rotate and the safe remains locked.

If the password is correct and the safe is opened, a time of 8 seconds is calculated, after which the safe is locked. In the last case, if the button is locked from the beginning, nothing I mentioned will be done and a message will be printed saying that the button is locked. At the same time, if the button is open and the motor is already running, then you close the button, the motor will lock immediately.

After I wrote the code and verified it, I uploaded it to the Arduino and moved to make the card board.

Cardboard

I started cutting the main parts of the safe.

I chose the part where I will install the keypad.

Then I cut out the specified part and glued the keypad to it.

I glued the board to the base.

Then I completed gluing the body of the safe except for the side of the keypad.

I glued a piece of cardboard a little higher than the board and glued the Arduino to it.

Then I connected the Arduino negative to the board

Then I connected the rest of the electronics, the keypad.

and connected the buzzer

and the servo motor

then the botton

Now all parts are connected

A small circular hole is made on the side for the adapter to pass through to the Arduino to connect electricity.

I used part of a straw to make the part that will connect the door to the motor.

Then I closed all the sides by placing the last one, which is the part that the keypad is attached to.

The last step is to put the motor in its place and connect it to the door.

And here is my safe

20250213_045300.mp4

Community of Learning

Did you ask for feedback? What are the ideas that others have contributed or suggested? What was someone else’s idea that you built upon? How did you help your peers? How did your peers help you?

Working with my teammate Sara to do the task of the week helped me a lot.

Overcoming Challenges

When you got stuck, what/who did you turn to? At what point did you have to pause to research or learn more before moving on? What are some mistakes, pitfalls, or challenges that others can avoid if they were doing this assignment?

I actually had a lot of problems this week :)

The first one is that I didn't connect or program the keypad before, so I followed the explanation videos on the portal this week, but the problem is that the keypad I have now is 4*4 not like the one in the video 3*4 so I searched on Google to see how to deal with the one I have and program it and if there is a difference in the code or connection, and I found this site that helped me a lot, the difference was small in fact all you have to do is add the letters in the extra column and connect an extra wire as well

The second problem was

After I connected the motor and the keypad to the circuit and tried them, they were working well, as well as the buzzer, but when I wanted to add a button to control the circuit, of course I added if condition and I had defined the pin in the set-up, but when I uploaded the code to the Arduino, the button did not work and what was printed was that the button was closed, which should appear in its solution that the button is closed, so I tried to open it, but the result was the same, so after a long effort I remembered that I should define the pin as (INPUT_PULLUP) and not just (INPUT) and another thing, which is that the condition must be if ( digitalRead(11) == LOW) {} not if ( digitalRead(11) == HIGH){} and after correcting the code, I uploaded it to the Arduino and it worked.

Final Project

How can you use the skills and knowledge that you've acquired this week in your final project?

What I learned this week from coding and making a small device that is very similar in its requirements in Final Project, will help me a lot.

WOW!

What is the coolest thing that you've learned this week? What is something that you will never forget from this week?

I think the most wonderful thing this week was working as a team to accomplish something new and produce acceptable results.

week 7 task.mp4

Weekly Digest [OPTIONAL]

Tell us about any other cool things that you've made this week: in the Hands-on activity, tutorial examples, exercises, or any other cool mini-project that you tried out aside from the assignment.

I designed and programmed this circuit, you can check it out

Simulation

Assignment Design Files

Tinkercad Simulation

Code [ino]

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