Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various components such as a 4x4 Membrane Matrix Keypad, an LCD display, a power supply unit, an Arduino Mega 2560, a real-time clock module, a passive buzzer, an 8x8 LED matrix, and a flame sensor. The circuit is designed to interface these components with the Arduino Mega 2560, which controls their operation through embedded code.

Component List

4X4 Membrane Matrix Keypad

• Description: A keypad with 4 rows and 4 columns, used for user input.
• Pins: R1, R2, R3, R4, C1, C2, C3, C4

Lcd 20x4 i2c

• Description: A 20x4 character LCD display with I2C interface.
• Pins: GND, 5v, SCA, SCL

5V PSU

• Description: A 5V power supply unit.
• Pins: 5V+, GND, 5V OK, PE, N, L

Arduino Mega 2560

• Description: A microcontroller board based on the ATmega2560.
• Pins: IOREF, RESET, 3V3, 5V, GND, VIN, A0-A15, D0-D53, PWM, AREF, SDA, SCL

DS3231 RTC

• Description: A real-time clock module.
• Pins: 32K, SQW, SCL, SDA, VCC, GND

Passive Buzzer Module

• Description: A module that produces sound when a voltage is applied.
• Pins: GND, I/O, VCC

8x8 Matrix

• Description: An 8x8 LED matrix display.
• Pins: vcc, DIN, clk, CS, Gnd, gnd, CLK

KY-026 Flame Sensor

• Description: A sensor module that detects flame.
• Pins: AO, GND, VCC, DO

Wiring Details

4X4 Membrane Matrix Keypad

• C4: Connected to Arduino Mega 2560 pin D51
• C3: Connected to Arduino Mega 2560 pin D49
• C2: Connected to Arduino Mega 2560 pin D47
• C1: Connected to Arduino Mega 2560 pin D45
• R4: Connected to Arduino Mega 2560 pin D43
• R3: Connected to Arduino Mega 2560 pin D41
• R2: Connected to Arduino Mega 2560 pin D39
• R1: Connected to Arduino Mega 2560 pin D37

Lcd 20x4 i2c

• GND: Connected to 5V PSU GND
• 5v: Connected to 5V PSU 5V+
• SCA: Connected to Arduino Mega 2560 SDA
• SCL: Connected to Arduino Mega 2560 SCL

5V PSU

• 5V+: Connected to Arduino Mega 2560 5V, Lcd 20x4 i2c 5v, DS3231 RTC VCC, Passive Buzzer Module VCC, 8x8 Matrix vcc
• GND: Connected to Arduino Mega 2560 GND, Lcd 20x4 i2c GND, DS3231 RTC GND, Passive Buzzer Module GND, 8x8 Matrix gnd, KY-026 Flame Sensor GND

Arduino Mega 2560

• 5V: Connected to 5V PSU 5V+
• GND: Connected to 5V PSU GND
• D21/SCL: Connected to DS3231 RTC SCL
• D20/SDA: Connected to DS3231 RTC SDA
• D2 PWM: Connected to KY-026 Flame Sensor DO
• D3 PWM: Connected to Passive Buzzer Module I/O
• D9 PWM: Connected to 8x8 Matrix CLK
• D10 PWM: Connected to 8x8 Matrix DIN
• D13 PWM: Connected to 8x8 Matrix CS
• SDA: Connected to Lcd 20x4 i2c SCA
• SCL: Connected to Lcd 20x4 i2c SCL
• D51: Connected to 4X4 Membrane Matrix Keypad C4
• D49: Connected to 4X4 Membrane Matrix Keypad C3
• D47: Connected to 4X4 Membrane Matrix Keypad C2
• D45: Connected to 4X4 Membrane Matrix Keypad C1
• D43: Connected to 4X4 Membrane Matrix Keypad R4
• D41: Connected to 4X4 Membrane Matrix Keypad R3
• D39: Connected to 4X4 Membrane Matrix Keypad R2
• D37: Connected to 4X4 Membrane Matrix Keypad R1

DS3231 RTC

• VCC: Connected to 5V PSU 5V+
• GND: Connected to 5V PSU GND
• SCL: Connected to Arduino Mega 2560 D21/SCL
• SDA: Connected to Arduino Mega 2560 D20/SDA

Passive Buzzer Module

• VCC: Connected to 5V PSU 5V+
• GND: Connected to 5V PSU GND
• I/O: Connected to Arduino Mega 2560 D3 PWM

8x8 Matrix

• vcc: Connected to 5V PSU 5V+
• DIN: Connected to Arduino Mega 2560 D10 PWM
• clk: Connected to Arduino Mega 2560 D9 PWM
• CS: Connected to Arduino Mega 2560 D13 PWM
• Gnd: Connected to 5V PSU GND

KY-026 Flame Sensor

• GND: Connected to 5V PSU GND
• VCC: Connected to Arduino Mega 2560 5V
• DO: Connected to Arduino Mega 2560 D2 PWM

Documented Code

Arduino Mega 2560 Code

File Name: sketch.ino

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

}

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

}

File Name: documentation.txt

This documentation provides a comprehensive overview of the circuit, including the components used, their wiring details, and the embedded code for the Arduino Mega 2560.