Digital Randomizer README

Overview

The Digital Randomizer is a digital device designed to generate random integer numbers using an ATmega328P microcontroller. The project consists of two main components: the Human-Machine Interface (HMI) MCU and the Processing MCU. The HMI MCU is connected to various components, including 7-segments, LEDs, push buttons, servo motor, and a buzzer. The Processing MCU is connected to LEDs.

Project Components

• 2 ATmega328P microcontrollers (Arduino UNO)
• 5 LEDs for displaying numbers.
• 3 LEDs to show the state of the processing MCU.
• Buzzer for audible feedback.
• Servo motor for angular feedback.
• 3 Push buttons for rolling the Randomizer.

Description

1. Generating Random Numbers:

   • Press the "Generate" push button on the HMI MCU.
   • HMI MCU sends a request to the Processing MCU to generate a random number.
   • The 1st LED connected to the processing MCU turns ON, then the 2nd LED after one second, indicating the random number is ready.
   • After one more second, the Processing MCU responds with the random number, and the 3rd LED turns on.
   • All LEDs turn off after one second.
   • If synchronization issues occur, the 3 LEDs toggle for 5 seconds (toggle every 500 ms).

2. Displaying Random Numbers:

   • The HMI displays the generated number in 5 digits on 5 LEDs, one digit at a time.
   • Corresponding LEDs light up for each digit in the order of appearance.
   • The buzzer releases a sound with a duty cycle based on the digit value / 10 for 5 seconds.
   • After 5 seconds, the duty cycle becomes the random number / 65535.

3. Servo Motor Movement:

   • The HMI moves the servo to a position (random number % 180) over a 5-second period.

4. User Interaction:

   • Pressing the "Next" button skips the current task and moves to the next digit quickly.
   • Pressing the "Previous" button does the same but in reverse.
   • If "Generate" is pressed before the completion of the previous task, the current task is ignored, and the new task starts immediately.

5. State Persistence:

   • The system's current state, including the generated random number and the current displayed digit, is saved in EEPROM.
   • Upon system reset or power cycle, the system resumes from the last saved state.

Project Objectives

1. Randomizer: Develop a digital Randomizer using ATmega328P microcontrollers.
2. Random Number Algorithm: Support both pseudo and real random number generation algorithms.
3. Display: Utilize one 7-segment display and 5 LEDs to visually represent the generated number.
4. Audio Feedback: Integrate a buzzer to provide audible indications with a signal bias from the potentiometer's read value.
5. User Interaction: Design user-friendly controls with 3 push buttons for operating the Digital Randomizer.
6. Low Power Consumption: Optimize the device for low power consumption to prolong battery life.

Prototype Schematic

How to Run the Simulation

To run the simulation, you'll need Simulide. Follow these steps:

1. Download Simulide from Simulide's official website and install it on your machine.
2. Open Simulide and load the simulation file provided: Project.simu.sim1.
3. Run the simulation within Simulide to observe the behavior of the digital randomizer prototype.

Prototype Video

Watch the Digital Randomizer Prototype Video