Week 7# - Journal

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 I made a small kinda functioning car🌞✨

it's the first part of my project to make a car controlled by ultrasonic sensor, as it will be moving forward till it faces any type of obstacle, the ultrasonic sensor then will turn it in a circle to avoid the obstacle, and in the same time the IR sensor will turn the buzzer on when the car is so close to the obstacle.

And attached to all of this a pen with a servo as I was trying to make it draw it's moving Pattern on floor.

VID_20240219033051.mp4

Tool Chain⚒️:

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

Tinker CAD

to build and simulate my circuit before making it IRL

Arduino UNO

It will be our brain for the curcit.

Motor driver l298n

to control the 2 DC motors I'll be using for the car

Jumper wires

to wire it all up

2 DC motors with wheel

I'll be using on DC motor to move the car forward and the other to move car in a circle so that it avoid obstacles

servo motor

I'll use it to move the flowmaster pen

Small breadboard

for building temporary circuits

flowmaster pen

it will be stick to servo shaft so that the car will be drawing while it moves

cardboard

as i used it to make the encloser for the car

IR sensor

Obstacle detector

Buzzer

I'll be using the buzzer as my second output, as it will buzz when the car comes to an obstacle, and its input will be the IR sensor.

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?

Design/Preparation Process:🌟

first things first we will build and simulate our curcit in Tinker CAD✨

start by listing all of your components and searching about how to wire it all up, then start connecting it to see the final result
p.s. I need a Motor driver l298n to control the 2 DC motors I'll be using for the car, but this module isn't available on tinker CAD so I used the "l2930" instead, sme with the IR sensor, as i used PIR sensor to replace

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

Development/Implementation Process⚒️:

Now let's start coding 🌟

and it is the hardest part so far

To start coding process i went searching for every component coding process, yet it was really hard to go through coding so i started using the last week code as a reference, it was my reference in the whole ultrasonic/ DC motor process.

The first part of the code:

start by including libraries that you need for coding in my case it was the servo motor, so I include it in the first line then i defined its place on Arduino in the third line.

2. I started defining the variables I need for ultrasonic sensor, and its pins on the Arduino.

3. I defined every and each pin of the two motors, and by setting every value of these pins I can control the direction of the motor, and that's the coolest part of the Motor driver l298n module

4. finally the i set the integrs for buzzer and IR sensor.

The second part of the code:

I set every pin mode as I'll be using 2 inputs which is IR sensor and Ultrasonic sensor, and 3 outputs which are buzzer, 2 DC motors and a servo motor.

The Third part of the code:

the void loop which will have my Ultrasonic sensor loop, as i need it to be done at every start of the code.

Then IF\else condition, and i set 2 If conditions, one for every sensor.

Ultrasonic sensor If condition:

which will be running the motor to move the car forward, and once the Ultrasonic sensor detect an obstacle, the code will run the other motor with the front wheel to make the car turn.

IR sensor If condition:

It will be buzzing the buzzer when a obstacle comes too close.

Ultrasonic check while coding⚒️:

it sometimes gives false distance, but so far so good

Untitled video - Made with Clipchamp.mp4

It gives false distance out of no where every some accurate distances, and I'll be suffering with this when i get to the final check ✨

Real life check⚒️:

finally I but it all in a cardboard encloser, and started testing it in real life.

VID_20240219033051.mp4

VID_20240219140053.mp4

there was a little bit of delay in ultrasonic sensor part as it showed before for the out of no where false reading but overall it was functioning.

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)

Overcoming Challenges

It was so hard starting coding process, but i guess its because i thought I HAVE TO code myself, once i dropped that idea and started actual collecting my code, it started working.

so this was my ultrasonic code reference: ultrasonic code reference.

and i used my pervious week IR sensor coding which is Here, and i just replaced servo with Buzzer.

and the Motor driver l298n module reference for wiring, and coding was THIS,

except that i didn't use the ENA and ENB part as i didn't want to control the speed of the motors for now.

Ultrasonic sensor controlled car [.ino]

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Week 7# - Journal

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 I made a small kinda functioning car🌞✨

Tool Chain⚒️:

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

Tinker CAD

Arduino UNO

Motor driver l298n

Jumper wires

2 DC motors with wheel

servo motor

Small breadboard

flowmaster pen

cardboard

IR sensor

Buzzer

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?

Design/Preparation 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?

Development/Implementation Process⚒️:

Now let's start coding 🌟

To start coding process i went searching for every component coding process, yet it was really hard to go through coding so i started using the last week code as a reference, it was my reference in the whole ultrasonic/ DC motor process.

The first part of the code:

The second part of the code:

The Third part of the code:

Then IF\else condition, and i set 2 If conditions, one for every sensor.

Ultrasonic check while coding⚒️:

it sometimes gives false distance, but so far so good

Real life check⚒️:

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)

Overcoming Challenges

It was so hard starting coding process, but i guess its because i thought I HAVE TO code myself, once i dropped that idea and started actual collecting my code, it started working.

Get in touch at khlood.nagh00@gmail.com