Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an HC-SR04 Ultrasonic Sensor, a 16x2 I2C LCD, a NodeMCU V3 ESP8266, two IR sensors, two Servos, and a red LED. The circuit is designed to interface these components with the NodeMCU for various sensing and display purposes.

Component List

HC-SR04 Ultrasonic Sensor

• Description: Ultrasonic distance sensor
• Pins: VCC, TRIG, ECHO, GND

16x2 I2C LCD

• Description: 16x2 character LCD with I2C interface
• Pins: GND, VCC, SDA, SCL

NodeMCU V3 ESP8266

• Description: Wi-Fi enabled microcontroller
• Pins: A0, GND, VU, S3, S2, S1, SC, S0, SK, 3V3, EN, RST, Vin, D0, D1, D2, D3, D4, D5, D6, D7, D8, RX, TX

Servo (x2)

• Description: Servo motor
• Pins: gnd, vcc, pulse

IR Sensor (x2)

• Description: Infrared sensor
• Pins: out, gnd, vcc

LED: Two Pin (red)

• Description: Red LED
• Pins: cathode, anode

Wiring Details

HC-SR04 Ultrasonic Sensor

• VCC connected to NodeMCU Vin
• TRIG connected to NodeMCU D7
• ECHO connected to NodeMCU D8
• GND connected to NodeMCU GND

16x2 I2C LCD

• GND connected to NodeMCU GND
• VCC connected to NodeMCU Vin
• SDA connected to NodeMCU D2
• SCL connected to NodeMCU D1

NodeMCU V3 ESP8266

• Vin connected to:
  • HC-SR04 Ultrasonic Sensor VCC
  • 16x2 I2C LCD VCC
  • IR Sensor VCC (both sensors)
  • Servo VCC (both servos)
• GND connected to:
  • HC-SR04 Ultrasonic Sensor GND
  • 16x2 I2C LCD GND
  • IR Sensor GND (both sensors)
  • Servo GND (both servos)
  • LED cathode
• D0 connected to IR Sensor out
• D1 connected to 16x2 I2C LCD SCL
• D2 connected to 16x2 I2C LCD SDA
• D3 connected to LED anode
• D4 connected to IR Sensor out
• D5 connected to Servo pulse
• D6 connected to Servo pulse
• D7 connected to HC-SR04 Ultrasonic Sensor TRIG
• D8 connected to HC-SR04 Ultrasonic Sensor ECHO

Servo (1)

• gnd connected to NodeMCU GND
• vcc connected to NodeMCU Vin
• pulse connected to NodeMCU D5

Servo (2)

• gnd connected to NodeMCU GND
• vcc connected to NodeMCU Vin
• pulse connected to NodeMCU D6

IR Sensor (1)

• out connected to NodeMCU D0
• gnd connected to NodeMCU GND
• vcc connected to NodeMCU Vin

IR Sensor (2)

• out connected to NodeMCU D4
• gnd connected to NodeMCU GND
• vcc connected to NodeMCU Vin

LED: Two Pin (red)

• cathode connected to NodeMCU GND
• anode connected to NodeMCU D3

Code

No code provided for this circuit.

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This documentation provides a comprehensive overview of the components and their connections in the circuit. Each component is described, and detailed wiring instructions are provided to ensure correct assembly.