Circuit Documentation

Summary

This circuit involves an ESP8266 NodeMCU microcontroller interfaced with various components including an ultrasonic distance sensor, an LCD display, a piezo buzzer, a red LED, and a resistor. The circuit is designed to measure distance using the ultrasonic sensor, display the distance on the LCD, and provide audio-visual feedback using the buzzer and LED.

Component List

1. ESP8266 NodeMCU

   • Description: A low-cost Wi-Fi microcontroller with GPIO, PWM, ADC, and more.
   • Pins: D0, D1, D2, D3, D4, 3V3, GND, D5, D6, D7, D8, RX, TX, A0, RSV, SD3, SD2, SD1, CMD, SD0, CLK, EN, RST, VIN

2. Resistor

   • Description: A 10k Ohm resistor.
   • Pins: pin1, pin2
   • Properties: Resistance: 10k Ohms

3. LED: Two Pin (red)

   • Description: A red LED with two pins.
   • Pins: cathode, anode

4. HC-SR04 Ultrasonic Distance Sensor

   • Description: An ultrasonic sensor used for distance measurement.
   • Pins: VCC, TRIG, ECHO, GND

5. LCD Display 16x4 I2C

   • Description: A 16x4 character LCD display with I2C interface.
   • Pins: SCL, SDA, VCC, GND

6. Piezo Buzzer

   • Description: A piezoelectric buzzer for audio feedback.
   • Pins: pin 1, pin 2

Wiring Details

ESP8266 NodeMCU

• VIN: Connected to VCC of HC-SR04 Ultrasonic Distance Sensor and VCC of LCD Display 16x4 I2C.
• D7: Connected to pin 1 of Piezo Buzzer.
• GND: Connected to pin 2 of Piezo Buzzer, cathode of LED, GND of HC-SR04 Ultrasonic Distance Sensor, and GND of LCD Display 16x4 I2C.
• D8: Connected to pin1 of Resistor.
• D1: Connected to SCL of LCD Display 16x4 I2C.
• D2: Connected to SDA of LCD Display 16x4 I2C.
• D5: Connected to TRIG of HC-SR04 Ultrasonic Distance Sensor.
• D6: Connected to ECHO of HC-SR04 Ultrasonic Distance Sensor.

Resistor

• pin1: Connected to D8 of ESP8266 NodeMCU.
• pin2: Connected to anode of LED.

LED: Two Pin (red)

• cathode: Connected to GND of ESP8266 NodeMCU.
• anode: Connected to pin2 of Resistor.

HC-SR04 Ultrasonic Distance Sensor

• VCC: Connected to VIN of ESP8266 NodeMCU.
• TRIG: Connected to D5 of ESP8266 NodeMCU.
• ECHO: Connected to D6 of ESP8266 NodeMCU.
• GND: Connected to GND of ESP8266 NodeMCU.

LCD Display 16x4 I2C

• SCL: Connected to D1 of ESP8266 NodeMCU.
• SDA: Connected to D2 of ESP8266 NodeMCU.
• VCC: Connected to VIN of ESP8266 NodeMCU.
• GND: Connected to GND of ESP8266 NodeMCU.

Piezo Buzzer

• pin 1: Connected to D7 of ESP8266 NodeMCU.
• pin 2: Connected to GND of ESP8266 NodeMCU.

Code

No code provided for this circuit.