Circuit Documentation

Summary

This circuit integrates a variety of components including microcontrollers, sensors, power supply units, a servo motor, an LCD screen, and a communication module. The primary microcontroller is an Arduino UNO, which interfaces with multiple HC-SR04 ultrasonic sensors and controls a SIM900A communication module. An ESP8266 Wi-Fi module is used for wireless connectivity and controls two servo motors. The ESP8266 also interfaces with an LCD screen via I2C communication. Power regulation is achieved using two XL6015 buck converters, which step down the voltage from a 12V 5A power supply. The ESP32 CAM module is included for camera functionalities.

Component List

Microcontrollers

• Arduino UNO: A microcontroller board based on the ATmega328P, commonly used for building digital devices and interactive objects that can sense and control objects in the physical world.
• ESP8266: A low-cost Wi-Fi microchip with full TCP/IP stack and microcontroller capability, used for wireless data communication.

Sensors

• HC-SR04 Ultrasonic Sensor: An ultrasonic distance sensor that provides 2cm to 400cm non-contact measurement functionality with a ranging accuracy that can reach up to 3mm.
• ESP32 CAM: A small camera module with Wi-Fi and Bluetooth capabilities, suitable for applications like surveillance cameras and face recognition.

Actuators

• Servo: An actuator that can rotate to a specified position, commonly used for precise control of angular motion.

Communication Modules

• SIM900A: A complete Dual-band GSM/GPRS module that can provide SMS and voice communication capabilities to embedded systems.

Power Supply and Conversion

• XL6015 Buck Converter: A DC-DC converter that steps down voltage while allowing for a high current output.
• POWER SUPPLY 12V 5AMP: A power supply unit that converts 220V AC to 12V DC, capable of delivering up to 5A of current.
• power 220v: Represents the main AC power source.

Display

• LCD screen 16x2 I2C: A liquid crystal display capable of showing 16 characters per line, with 2 lines. It uses the I2C communication protocol for interfacing.

Wiring Details

Microcontrollers

• Arduino UNO

  • Vin connected to the 5V output of the XL6015 Buck Converter.
  • GND connected to the ground of the circuit.
  • A0-A5 connected to the ECHO and TRIG pins of the HC-SR04 Ultrasonic Sensors.
  • D8-D9 connected to the 5VT and 5VR pins of the SIM900A module.

• ESP8266

  • VIN connected to the 5V output of the XL6015 Buck Converter.
  • G connected to the ground of the circuit.
  • D1-D5 connected to the SCL and SDA pins of the LCD screen and pulse pins of the Servos.

Sensors

• HC-SR04 Ultrasonic Sensors

  • VCC connected to the 5V output of the XL6015 Buck Converter.
  • GND connected to the ground of the circuit.
  • ECHO and TRIG connected to the corresponding analog pins on the Arduino UNO.

• ESP32 CAM

  • 5V connected to the 5V output of the XL6015 Buck Converter.
  • GND connected to the ground of the circuit.
  • GPIO12 and GPIO13 connected to the ECHO and TRIG pins of an HC-SR04 Ultrasonic Sensor.

Actuators

• Servos
  • vcc connected to the 5V output of the XL6015 Buck Converter.
  • gnd connected to the ground of the circuit.
  • pulse connected to the D4 and D5 pins of the ESP8266.

Communication Modules

• SIM900A
  • 5V connected to the 5V output of the XL6015 Buck Converter.
  • GND connected to the ground of the circuit.
  • 5VR and 5VT connected to the D9 and D8 pins of the Arduino UNO.

Power Supply and Conversion

• XL6015 Buck Converters

  • INPUT + connected to the 12V-24V Output (DC) of the POWER SUPPLY 12V 5AMP.
  • INPUT - connected to the GND (DC) of the POWER SUPPLY 12V 5AMP.
  • OUTPUT + and OUTPUT - provide 5V and GND to various components in the circuit.

• POWER SUPPLY 12V 5AMP

  • 220V Positive Pole (AC) connected to the neutral wire of the power 220v.
  • 220V Negative Pole (AC) connected to the hot wire of the power 220v.
  • GND (DC) and 12V-24V Output (DC) provide power to the XL6015 Buck Converters.

Display

• LCD screen 16x2 I2C
  • VCC connected to the 5V output of the XL6015 Buck Converter.
  • GND connected to the ground of the circuit.
  • SCL and SDA connected to the D1 and D2 pins of the ESP8266.

Documented Code

Arduino UNO Code (Instance ID: 9635889f-b0f7-4614-a523-b98247dcb2e4)

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

}

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

}

Note: The provided code for the Arduino UNO is a template with empty setup and loop functions. This code needs to be populated with instructions to control the HC-SR04 sensors and communicate with the SIM900A module.

ESP8266 Code

No code was provided for the ESP8266. It is assumed that the ESP8266 will be programmed to control the servo motors and interface with the LCD screen via I2C.

End of Documentation