Week 8 - Journal

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)

RGB LED and Servo moto

This Week assignment was to create a circuit with to Output controlled by Bluetooth. So, I used a Servo motor and RGB together with bluetooth.

The idea came up by thinking the back of the car. You can see which direction the car is heading by seeing the light emitted. if it turns left, the left light blinks, the same if it turns right.

Tool Chain

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

Tinkercad

Arduino IDE

GUI Bluetooth

Arduino

Cable

Servo

RGB LED

Jumpers

Breaboard

Resistors 220ohm

Bluetooth Module

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?

Title of Media

RGB Led :

GND ===> negative rail on breadboard
Green RGB Led ===> pin 3 Arduino Uno
Blue RGB Led ===> pin 5 Arduino Uno
Red RGB Led ===> pin 6 Arduino Uno

Servo:

Signal ===> pin 9 Arduino Uno
Negative===> negative rail on breadboard
Negative===> negative rail on breadboard

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?

Defining pins and Serial reading variable

Setting pins as outputs and starting the Serial communication

Reading only the incoming data by using "Serial.read()"

Assigning each number to a command with special color and angle for the RGB and servo

First, I put the rgb on breadboard with tree 220-ohm resistors each leg then connected to the Arduino PINS

Then, I added the servo by connecting to PIN 9 arduino

Finally I added the Bluetooth module by connecting the RTX TO TX Arduino and TX to RTX Arduino

COMPLETE CIRCUIT

WhatsApp Vidéo 2025-09-09 à 21.52.42_30d19f1d.mp4

When enter "1" as incoming data the rgb become red and the servo do "0" degree angle

if I enter "2" as incoming data the rgb become blue the servo do "50" degree angle.

if I enter "3" as incoming data the rgb become green the servo do "100" degree angle.

if I enter "4" as incoming data the rgb become Violet the servo do "150" degree angle.

if I enter "5" as incoming data the rgb become Orange the servo do "180" degree angle.

if I enter "6" as incoming data the rgb become yellow the servo do "0" again degree angle.

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 tried uploading the Arduino code but kept getting errors. I eventually realized that the USB can’t be used while the Bluetooth module is connected, since they both rely on the Serial monitor. The solution is to disconnect the Bluetooth module before uploading the code.