Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to interface various components with an Arduino UNO microcontroller. The circuit includes a display module, motor driver, DC gearmotors, temperature sensor, heart rate sensor, real-time clock, and a buzzer. The Arduino UNO serves as the central processing unit, controlling the inputs and outputs to the various peripherals. The circuit is powered by the Arduino's 5V and 3.3V outputs and includes an I2C communication bus for the sensors and RTC module.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• Provides digital and analog I/O pins
• Features I2C pins (A4, A5), SPI pins (D10-D13), and power outputs (3.3V, 5V)

Gearmotor DC Wheels Right (x2)

• DC gearmotors used for driving wheels
• Each motor has two connection pins

L298N DC Motor Driver

• H-Bridge motor driver capable of driving a pair of DC motors
• Provides motor control inputs and outputs, power inputs, and an enable jumper

Adafruit TFT 2.8 inch 320x240 Touch w/ microSD

• Color touchscreen display with microSD card slot
• Communicates with the Arduino via SPI and digital control pins

mlx90614

• Infrared temperature sensor
• Uses I2C communication

MAX30102

• Pulse oximetry and heart rate sensor
• Uses I2C communication and has interrupt and LED control pins

DS3231 RTC

• Real-time clock module
• Provides timekeeping via I2C communication

Buzzer

• Electromagnetic buzzer for audible alerts
• Controlled by a digital output from the Arduino

Wiring Details

Arduino UNO

• 5V and GND pins provide power to the Adafruit TFT display, L298N motor driver, mlx90614 sensor, and DS3231 RTC.
• 3.3V pin provides power to the MAX30102 sensor.
• A4 (SDA) and A5 (SCL) are connected to the I2C bus, interfacing with the mlx90614, MAX30102, and DS3231 RTC.
• Digital pins D2 to D13 are used for controlling the L298N motor driver, Adafruit TFT display, and buzzer.

Gearmotor DC Wheels Right

• Two motors are controlled by the L298N motor driver, with each motor having two pins connected to the driver's output.

L298N DC Motor Driver

• ENA and ENB are connected to Arduino pins D3 and D6 for enabling motor control.
• IN1, IN2, IN3, and IN4 are connected to Arduino pins D2, D4, D5, and D7 for motor direction control.
• OUT1, OUT2, OUT3, and OUT4 are connected to the gearmotor pins.

Adafruit TFT 2.8 inch 320x240 Touch w/ microSD

• +5V and GND for power connections.
• SCLK, MISO, MOSI, LCD_CS, LCD_DC, and LCD_RST are connected to Arduino pins D13, D12, D11, D10, D9, and D8 respectively for SPI communication and control.

mlx90614

• SDA and SCL are connected to the I2C bus.
• VIN and GND are connected to 5V and GND on the Arduino for power.

MAX30102

• SDA and SCL are connected to the I2C bus.
• VIN is connected to 3.3V on the Arduino, and GND is connected to GND.

DS3231 RTC

• SDA and SCL are connected to the I2C bus.
• VCC and GND are connected to 5V and GND on the Arduino for power.

Buzzer

• PIN is connected to Arduino pin D7.
• GND is connected to GND on the Arduino.

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Notes

• The provided code is a template and does not include specific functionality. It needs to be populated with the setup and loop functions to control the components as per the circuit design.
• The documentation.txt file is empty and does not contain any additional information.