Week 7 - 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)

This project is inspired by the idea of automatic door that opens when somebody gets within the range.

Tool Chain

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

Software used:

TinkerCad to design & simulate circuit.

Arduino IDE to upload the code to the Arduino

Components:

Arduino Uno
Ultrasonic sensor
LEDs
Servo motor
330 ohm resistance
Jumpers
Breadboard
ON-OFF switch

Design/Preparation Process

Describe the design of your smart device. What are the input and action components that you used? Make sure to include a screenshot of your circuit wiring on Tinkercad or any other software (Fritzing or Microsoft PowerPoint). Explain your Arduino C code in detail, describe the code that you wrote using simple text, Pseudocode, or Flowchart format

Input components: Ultrasonic sensor & switch
Action components: LED & Servo motor

First, the switch is used to turn on the whole circuit, when the switch is ON a yellow led lights.

If an objects appears within a range of 30cm the ultrasonic triggers a green LED shows that the door is open, and servo rotates 90 degrees to point at this LED.

If no object appears within the specified range a red LED shows that the door is closed, and servo rotates 90 degrees to point at this LED.

Implementation/Fabrication:

Describe how you implemented your smart circuit on a breadboard and integrated the components within the enclosure. And most importantly, show us the final outcome of the assignment, make sure to include a video recording for your complete smart circuit in action

Common GND & Vcc is connected from Arduino to breadboard.
LEDs ground is connected to the common ground through 330 ohm resistance, and positive LEDs is connected to the Arduino pins (10,11,12)
Ultrasonic sensor's GND & Vcc are connected to common ones, and trigger&echo are connected to pins (5,6) on Arduino
Servo motor GND & Vcc as before and the third pin is connected to pin (~10) on Arduino

Switch is connected to pin (4) as pullup, and the other pole to the common ground.

after that everything is mounted on the enclosure and ready to work.

VID_20210911_153256.mp4

Learning from Mistakes

Describe problems and challenges that you faced, and briefly describe solutions. How did you debug your code for error?

A common mistake I did that I forgot to make the switch PULLUP, this is very important to avoid strange behavior of the circuit.

Community of Learning

Highlight an advice or idea provided by a peer or an instructor that helped in solving a problem or a challenge. Or an advice that YOU provided to help your peer(s)

Something I learnt from peers is to reuse any scrap material at home, this could be much easier to construct a rigid box rather than making it from scratch.

Final Project