Everything related to the course.

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1. Development of POC (Proof of Concept) and Final Product Development Skills
2. Encouragement of Critical Thinking and Problem Solving
3. Programming Skills Development
4. Understanding Basic Robotics Concepts
5. Understanding and Using Microcontrollers

This repo will contain all materials related to the laboratory. The code for each project is available in it's specific folder.

• 1x RGB Led
• 3x Potentiometers
• 1x Arduino Uno
• 1x Half breadboard
• 1x 220Ω rezistor
• 2x 100Ω rezistors
• many colorful wires

Wokwi Implementation

Demo link

This assignment focuses on controlling each channel (Red, Green, and Blue) of an RGB LED using individual potentiometers. By the end of this task, you will gain experience in interfacing potentiometers with the Arduino and controlling RGB LEDs based on the analog readings.

Development process

Version 1

1x 220Ω rezistor

This initial version used only ore resistor for the entire circuit. It did work, however, the red LED was significantly brighter than the others. According to this article, the voltage drop of the LED tends to rise as the frequency of the light wave increases. Therefore, it is suitable to use different resistors for each color of the RGB LED.

With the available choices, I've selected 2x 100Ω resistors for the blue and green LEDs.

Version 2

Filtering signal

This second version brings modifications to the code. The main flaw of version 1 was the flickering of the green LED when adjusting the other knobs. I`ve manually implemented a high pass filter such that values below a certain threshold would not register.

LED values are now updated every 10 mills, attempting to reduce flickering and provide a smoother output.

• 5x LEDs
• 4x Buttons
• 1x Active Buzzer
• 1x Arduino Uno
• 1x Full breadboard
• 1x Mini breadboard
• 4x 220Ω rezistor
• 2x 100Ω rezistors
• many colorful wires

Wokwi Implementation

Demo link

This assignment involves simulating a 3-floor elevator control system using LEDs, buttons, and a buzzer with Arduino. By the end of this task, you will gain experience in using button state change, implementing debouncing techniques, and coordinating multiple components to represent real-world scenarios.

  Elevator is at floor 2;
  Buttons on floors 3, 1 and 4 are pressed in this order;
  The common order we would want the elevator to travel is: 3 -> 4 -> 1, despite the actual pressing order.

• 1x 7-Segment Display
• 1x Joystick
• 1x Arduino Uno
• 1x Half breadboard
• 1x Mini breadboard
• 8x 330Ω rezistors
• many colorful wires

Wokwi Implementation

Wokwi Implementation - using interrupts.

Demo link

The task involves using the joystick to control the position of the segment and "draw" on the display. The objective is to ensure that the movement between segments is natural, allowing jumps only to neighboring positions without passing through "walls." The initial position should be on the DP. The current position always blinks (irrespective of the fact that the segment is on or off). Use the joystick to move from one position to neighbors (see table for corresponding movement). Short pressing the button toggles the segment state from ON to OFF or from OFF to ON. Long pressing the button resets the entire display by turning all the segments OFF and moving the current position to the decimal point.

• 1x 4 digit 7 Segment Display
• 3x Buttons
• 1x Arduino Uno
• 2x Half breadboards
• 1x 74HC595shift register
• many 330Ω rezistors
• many colorful wires

Wokwi Implementation

Demo link

Using the 4-digit 7-segment display and three buttons, the task is implementing a stopwatch timer capable of counting in tenths of a second. Additionally, the design should incorporate a save lap functionality, akin to the basic stopwatch features commonly found on most phones.

• 1x RGB Led
• 1x Ultrasonic Sensor (HC-SR04)
• 1x Light-Dependent Resistor
• 1x Arduino Uno
• 1x Half breadboard
• 1x Mini breadboard
• 1x 220Ω rezistor
• 1x 10KΩ rezistor
• 2x 100Ω rezistors
• many colorful wires

Wokwi Implementation - code only.

Demo link - TBA

The task involves developing a "Smart Environment Monitor and Logger" using Arduino. This system aims to utilize various sensors for gathering environmental data, logging this information into EEPROM, and offering visual feedback through an RGB LED. Additionally, it should provide user interaction via a Serial Menu. The project emphasizes the integration of sensor readings, memory management, Serial Communication, and the overall goal of constructing a menu.

In order to prevent wear on the EEPROM, the system should avoid excessive writing. It is recommended to refrain from using EEPROM.write and instead utilize EEPROM.update() or EEPROM.put() for more efficient write cycles.

Calibration of sensors is crucial for obtaining accurate readings. It is imperative to ensure that sensors are correctly calibrated, and their interval values are well-known and accounted for in the system.

To enhance the robustness of Serial Communication, the system should implement error handling mechanisms. This includes the ability to manage and respond to incorrect inputs, ensuring a more reliable and resilient communication interface.

  void advanceMenu(int option);

  void printMenu();

short movementMatrix[MENUS][MAX_MENU_OPTIONS]={
  {-1,1,2,3,4},
  {-1,11,12,13,0},
  {-1,21,22,23,0},
  {-1,31,32,33,0},
  {-1,41,42,0,-1},
};

1. 📐 Wokwi - Project diagram application.
2. ♣️ Arduino Style Guide - Style guided started by Andrei Dumitriu.
3. 📘 Arduino Language Reference - Arduino Documentation.

• All courses, laboratories and homework assignments were provided by Ph. D candidate Andrei Dumitriu.
• Lab tutor, friendly face and always there to answer questions: Vlad Toader