Circuit Documentation

Summary

This circuit involves an Arduino Mega 2560 microcontroller interfacing with various components including multiple MG90S servos, an LCD display, a DS3231 RTC module, a 1 Channel 5V Relay Module, a SIM900A GSM module, an ESP32, an IR sensor, a 12V solenoid lock, and a Li-ion battery. The circuit is designed to control servos, display information on an LCD, manage real-time clock data, control a relay, communicate via GSM, and sense infrared signals.

Component List

Resistor

• Description: A 220 Ohm resistor.
• Pins: pin1, pin2
• Properties:
  • Resistance: 220 Ohms

Arduino Mega 2560

• Description: A microcontroller board based on the ATmega2560.
• Pins: IOREF, RESET, 3V3, 5V, GND, VIN, A0-A15, D0-D53, AREF, SDA, SCL
• Properties: None

MG90S Servo Motors

• Description: Micro servo motors.
• Pins: SIG, VCC, GND
• Properties: None

Lcd 20x4 i2c

• Description: 20x4 character LCD with I2C interface.
• Pins: GND, 5v, SCA, SCL
• Properties: None

DS3231 RTC

• Description: Real-time clock module.
• Pins: 32K, SQW, SCL, SDA, VCC, GND
• Properties: None

1 Channel 5V Relay Module

• Description: Relay module for switching high voltage devices.
• Pins: VCC+, VCC- (GND), IN, N.O., COM, N.C.
• Properties: None

SIM900A

• Description: GSM module for communication.
• Pins: GND, DB9-3 (RXD), DB9-2 (TXD), 5V, 3VR, 5VR, 3VT, 5VT, VCC, Ring, RESTART, RESET, STATUS
• Properties: None

ESP32 (30 pin)

• Description: Wi-Fi and Bluetooth microcontroller.
• Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, Vin, D23, D22, TX0, RX0, D21, D19, D18, D5, TX2, RX2, D4, D2, D15, 3V3
• Properties: None

IR Sensor

• Description: Infrared sensor for object detection.
• Pins: out, gnd, vcc
• Properties: None

12V Solenoid Lock

• Description: Electromagnetic lock.
• Pins: VCC, GND
• Properties: None

Li-ion 5000mAh Battery

• Description: Rechargeable battery.
• Pins: 11.1V, GND
• Properties: None

Wiring Details

Resistor

• pin1: Connected to VCC of IR sensor, VCC of DS3231 RTC, 5V of Arduino Mega 2560, VCC+ of 1 Channel 5V Relay Module
• pin2: Connected to 5v of Lcd 20x4 i2c

Arduino Mega 2560

• D10 PWM: Connected to SIG of MG90S
• D9 PWM: Connected to SIG of MG90S
• D8 PWM: Connected to SIG of MG90S
• D6 PWM: Connected to SIG of MG90S
• D7 PWM: Connected to SIG of MG90S
• SCL: Connected to SCL of Lcd 20x4 i2c, SCL of DS3231 RTC
• SDA: Connected to SCA of Lcd 20x4 i2c, SDA of DS3231 RTC
• D23: Connected to IN of 1 Channel 5V Relay Module
• D19/RX1: Connected to DB9-3 (RXD) of SIM900A
• D18/TX1: Connected to DB9-2 (TXD) of SIM900A
• D1 TX0: Connected to TX0 of ESP32
• D0 RX0: Connected to RX0 of ESP32
• 5V: Connected to VCC of MG90S, VCC of Lcd 20x4 i2c, VCC of DS3231 RTC, VCC+ of 1 Channel 5V Relay Module
• GND: Connected to GND of MG90S, GND of Lcd 20x4 i2c, GND of IR sensor, GND of DS3231 RTC, VCC- (GND) of 1 Channel 5V Relay Module, GND of SIM900A, GND of ESP32
• 3V3: Connected to VCC of SIM900A, Vin of ESP32
• D22: Connected to out of IR sensor

MG90S Servo Motors

• SIG: Connected to D10 PWM, D9 PWM, D8 PWM, D6 PWM, D7 PWM of Arduino Mega 2560
• VCC: Connected to 5V of Arduino Mega 2560
• GND: Connected to GND of Arduino Mega 2560

Lcd 20x4 i2c

• SCL: Connected to SCL of Arduino Mega 2560, SCL of DS3231 RTC
• SCA: Connected to SDA of Arduino Mega 2560, SDA of DS3231 RTC
• GND: Connected to GND of Arduino Mega 2560
• 5v: Connected to pin2 of Resistor

DS3231 RTC

• SCL: Connected to SCL of Arduino Mega 2560, SCL of Lcd 20x4 i2c
• SDA: Connected to SDA of Arduino Mega 2560, SCA of Lcd 20x4 i2c
• VCC: Connected to pin1 of Resistor
• GND: Connected to GND of Arduino Mega 2560

1 Channel 5V Relay Module

• IN: Connected to D23 of Arduino Mega 2560
• VCC+: Connected to pin1 of Resistor
• VCC- (GND): Connected to GND of Arduino Mega 2560
• N.O.: Connected to GND of Li-ion 5000mAh Battery
• COM: Connected to 11.1V of Li-ion 5000mAh Battery
• N.C.: Connected to VCC of 12V Solenoid Lock

SIM900A

• DB9-3 (RXD): Connected to D19/RX1 of Arduino Mega 2560
• DB9-2 (TXD): Connected to D18/TX1 of Arduino Mega 2560
• VCC: Connected to 3V3 of Arduino Mega 2560
• GND: Connected to GND of Arduino Mega 2560

ESP32 (30 pin)

• TX0: Connected to D1 TX0 of Arduino Mega 2560
• RX0: Connected to D0 RX0 of Arduino Mega 2560
• Vin: Connected to 3V3 of Arduino Mega 2560
• GND: Connected to GND of Arduino Mega 2560

IR Sensor

• out: Connected to D22 of Arduino Mega 2560
• gnd: Connected to GND of Arduino Mega 2560
• vcc: Connected to pin1 of Resistor

12V Solenoid Lock

• VCC: Connected to N.C. of 1 Channel 5V Relay Module
• GND: No connection specified

Li-ion 5000mAh Battery

• 11.1V: Connected to COM of 1 Channel 5V Relay Module
• GND: Connected to N.O. of 1 Channel 5V Relay Module

Documented Code

Arduino Mega 2560 Code

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

}

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

}

This code is a basic template for the Arduino Mega 2560. The setup() function is used to initialize any settings or configurations, and the loop() function contains the main code that runs repeatedly.