Week #6 - Journal

Coin box in progress =D

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)

It came up to my mind while thinking of the assignment to make a piggy bank or coin box that opens when I get near it.

I searched for similar projects like: coin box

But I decided to make it using IR sensor instead of the method shown in the link.

Tool Chain

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

software

Arduino IDE

I used Arduino to burn the code to arduino uno to start the trial physically

Tinker CAD

I used tinker cad to test and simulate the circuit before prototyping it physically to protect the electronics from burning or any problem

materials

arduino uno + usb cable

IR sensor

servo motor

breadboard

Male - Male jumper wires

for most connections

Male - Female jumper wires

for connecting the IR sensor

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?

At first, I opened tinker cad and started to put the electronics or tools I need then I started to wire it:
1- PIR sensor "INPUT": VCC ' red wire ' to +
GND ' black wire ' to -
out ' orange wire ' to pin 4

2- servo motor "OUTPUT": Power ' red wire ' to +
ground ' brown wire ' to -
signal ' green wire ' to pin 3

solution.mp4

I then used code blocks to make the code as following:
from control I selected --> if - else
from math I selected --> 0 < 0 and brought HIGH or LOW block
from input I selected --> read digital pin
I put read digital pin 4 in the first 0 and HIGH block in the second 0. After that, I put the math in the if condition.

from output I choose --> rotate servo
I set the pin to 3 following my wiring diagram then set the degree to 45 " to open the door for the coin when I get near the IR " then wait 5 seconds then rotate to 90 degrees again
Else --> when I'm not near the sensor rotate servo to 90 degrees to close the door.

copy.mp4

By choosing Blocks + text I viewed the code text to copy it to arduino IDE

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?

IR sensor: VCC ' red wire ' to +
GND ' black wire ' to -
out ' Yellow wire ' to pin 4

servo motor:
Power ' red wire ' to +
ground ' brown wire ' to -
signal ' orange wire ' to pin 3

white wire from + to 5v
black wire from - to GND

check and upload.mp4

copying the code to Arduino IDE then connecting the arduino to the laptop using usb cable then uploading
don't forget to check from tools:
board --> arduino uno
port --> the com connected to the arduino

WhatsApp Video 2022-09-03 at 00.50.21.mp4

Testing physically

Overcoming Challenges

What kinds of challenges or problems did you face while doing the assignment, tutorials, or exercises? How did you solve them? Did you ask for help from an instructor or peer? Please provide a link to the tutorial or article that you used to solve your problem (if any)

problem.mp4

First problem was that the action of the servo only happens when I move in the simulation but I needed time to put the coins before it closes the door again. So I put a delay for 5 secs as shown in the design part in the video

second problem was when I tested the IR sensor physically the servo was always 45 degrees and when I put my hand it goes to 90 degrees !!

WhatsApp Video 2022-09-03 at 00.50.55.mp4

This was solved by changing the condition from HIGH to LOW
to understand how this sensor works we could consider that it sends a laser line and as long as it's not cut this is it's HIGH value
but if we put an obstacle to cut this laser this is when it's LOW
So if it's LOW " there is an obstacle or I come close " it opens . wait 5 secs . close again
else --> HIGH " no one near " . Stay closed

solving problem.mp4

Final Project

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

It doesn't really relate to my final project but I gained more knowledge in making code using code blocks

WOW!

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

Teamwork with Sorour making " HAHAHA waving hand " =D

Assignment Design Files

coin box code.ino

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