Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various components such as LEDs, an IR sensor, an ESP32 microcontroller, an RFID module, a servo motor, an LCD display, a resistor, and a buzzer. The circuit is designed to interface these components with the ESP32 microcontroller to perform various functions.

Component List

1. LED: Two Pin (red)

   • Pins: cathode, anode
   • Description: A red LED used for visual indication.
   • Purpose: Visual indicator.

2. LED: Two Pin (green)

   • Pins: cathode, anode
   • Description: A green LED used for visual indication.
   • Purpose: Visual indicator.

3. IR Sensor

   • Pins: out, gnd, vcc
   • Description: An infrared sensor used for detecting objects.
   • Purpose: Object detection.

4. ESP32

   • Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, VIN, 3V3, D15, D2, D4, RX2, TX2, D5, D18, D19, D21, RX0, TX0, D22, D23, BOOT
   • Description: A microcontroller with Wi-Fi and Bluetooth capabilities.
   • Purpose: Central control unit.

5. RFID-RC522

   • Pins: VCC (3.3V), RST, GND, IRQ, MISO, MOSI, SCK, SDA
   • Description: An RFID module used for reading RFID tags.
   • Purpose: RFID tag reading.

6. Servo Motor 9G

   • Pins: VCC 5V, PMW, GND
   • Description: A small servo motor used for precise control of angular position.
   • Purpose: Actuation.

7. 16x2 I2C LCD

   • Pins: GND, VCC, SDA, SCL
   • Description: A 16x2 character LCD display with I2C interface.
   • Purpose: Display information.

8. Resistor

   • Pins: pin1, pin2
   • Description: A resistor with a resistance of 220 Ohms.
   • Purpose: Current limiting.

9. Buzzer

   • Pins: POSITIVE, NEGATIVE
   • Description: A buzzer used for audio indication.
   • Purpose: Audio indicator.

Wiring Details

LED: Two Pin (red)

• Cathode: Connected to the cathode of the green LED and pin1 of the resistor.
• Anode: Connected to pin D14 of the ESP32.

LED: Two Pin (green)

• Cathode: Connected to the cathode of the red LED and pin1 of the resistor.
• Anode: Connected to pin D27 of the ESP32.

IR Sensor

• Out: Connected to pin D32 of the ESP32.
• GND: Connected to the GND of the ESP32, GND of the RFID module, GND of the LCD, and pin2 of the resistor.
• VCC: Connected to the 3V3 pin of the ESP32, VCC of the RFID module, and VCC of the LCD.

ESP32

• 3V3: Connected to the VCC of the IR sensor, VCC of the RFID module, and VCC of the LCD.
• GND: Connected to the GND of the IR sensor, GND of the RFID module, GND of the LCD, and pin2 of the resistor.
• D14: Connected to the anode of the red LED.
• D27: Connected to the anode of the green LED.
• D32: Connected to the out pin of the IR sensor.
• D26: Connected to the positive pin of the buzzer.
• D13: Connected to the PMW pin of the servo motor.
• VIN: Connected to the VCC 5V pin of the servo motor.
• D5: Connected to the SDA pin of the RFID module.
• D18: Connected to the SCK pin of the RFID module.
• D19: Connected to the MISO pin of the RFID module.
• D21: Connected to the SDA pin of the LCD.
• D22: Connected to the SCL pin of the LCD.
• D23: Connected to the MOSI pin of the RFID module.

RFID-RC522

• VCC (3.3V): Connected to the 3V3 pin of the ESP32.
• GND: Connected to the GND of the ESP32, GND of the IR sensor, and GND of the LCD.
• SDA: Connected to pin D5 of the ESP32.
• SCK: Connected to pin D18 of the ESP32.
• MISO: Connected to pin D19 of the ESP32.
• MOSI: Connected to pin D23 of the ESP32.

Servo Motor 9G

• GND: Connected to the GND of the ESP32.
• PMW: Connected to pin D13 of the ESP32.
• VCC 5V: Connected to the VIN pin of the ESP32.

16x2 I2C LCD

• GND: Connected to the GND of the ESP32, GND of the IR sensor, and GND of the RFID module.
• VCC: Connected to the 3V3 pin of the ESP32.
• SDA: Connected to pin D21 of the ESP32.
• SCL: Connected to pin D22 of the ESP32.

Resistor

• Pin1: Connected to the cathode of the red LED and the cathode of the green LED.
• Pin2: Connected to the GND of the ESP32, GND of the IR sensor, and GND of the RFID module.

Buzzer

• POSITIVE: Connected to pin D26 of the ESP32.
• NEGATIVE: Connected to the GND of the ESP32.

Code

No code is provided for this circuit.