Week #6 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)

Too close alarm !

I wanted to use the ultrasonic sensor for this week's task, so i decided to go with a (keep your distance device). Where if anything is within 5 cm it will turn the RGB LED red and a buzzer goes off, otherwise the buzzer is off and the LED is white.

Tool Chain

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

Used to simulait electrical circuit

Avometer

Breadboard

Arduino Uno

220 ohm resistor

Jumper wires

RGB LED

ultrasonic 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?

Tinker circuit

Code blocks

Circuit:

Ultrasonic sensor pins connected (trigger -> 13, echo -> 12)
Connecting the piezo to pin 5
connecting RGB LED pins with 220-ohm resistors (red -> 2, blue -> 3, green -> 4)

Code:

Created a variable "distance" to store the sensor reading
If the reading is between 10 to 0 cm, the led turns red and buzzer is on (setting red and buzzer to high, while blue and green to low)
otherwise, the red will turn white and buzzer sound turned off (setting the pin to low)

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?

1) Connecting the sensor to breadboard and connecting the terminals to corresponding pins on the Arduino by jumpers

2) Connecting the RGB LED to the breadboard and its terminals to corresponding pins in the Arduino as well by resistors directly

3) Connecting the buzzer to its terminals as well

4) Complete assembly

Ultrasonic sensor take the distance as input

The RGB LED gives a colour output depending on specified distance

The buzzer makes a sound depending on the input from the Ultrasonic

video.mp4

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?

When I finished the assembly and uploaded the code to my Arduino, the circuit was not behaving as expected and the buzzer was always working and the led was always white.

After checking my wirings again, it turns out that I switched the Trigger and echo pins places which led to that behaviour

The solution is to simply check the wirings again 🤷

Wiring issue

Assignment Design Files

Simulation circuit

Arduino code

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