Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino Nano ESP32 microcontroller, various sensors (MPU6050, DHT22, MQ135, Heart Pulse Sensor), LEDs, and a buzzer. The circuit is designed to collect environmental and physiological data, and provide visual and auditory feedback.

Component List

1. Arduino Nano ESP32

   • Description: A compact microcontroller board based on the ESP32.
   • Pins: D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, GND, RST, RX0, TX1, D13, 3.3V, B0, A0, A1, A2, A3, A4, A5, A6, A7, VBUS, B1, VIN

2. MPU6050

   • Description: A 6-axis motion tracking device that combines a 3-axis gyroscope and a 3-axis accelerometer.
   • Pins: vcc, gnd, scl, sda, xda, xcl, AD0, int, 3.3v

3. DHT22

   • Description: A digital temperature and humidity sensor.
   • Pins: +, Out, -

4. MQ135

   • Description: A gas sensor for detecting air quality.
   • Pins: VCC, GND, A0, D0

5. Heart Pulse Sensor

   • Description: A sensor used to measure heart rate.
   • Pins: GND, VCC, SIGNAL

6. LED: Two Pin (green)

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

7. Buzzer

   • Description: An electronic device that emits sound.
   • Pins: PIN, GND

Wiring Details

Arduino Nano ESP32

• D12: Connected to Buzzer PIN
• D2: Connected to MQ135 A0 and DHT22 Out
• GND: Connected to LED (green) cathode, Buzzer GND, MPU6050 gnd, DHT22 -, MQ135 GND, Heart Pulse Sensor GND
• D13: Connected to LED (green) anode
• 3.3V: Connected to MPU6050 vcc and DHT22 +
• B0: Connected to MQ135 D0
• A0: Connected to Heart Pulse Sensor SIGNAL
• A4: Connected to MPU6050 sda
• A5: Connected to MPU6050 scl
• VIN: Connected to MQ135 VCC and Heart Pulse Sensor VCC

MPU6050

• vcc: Connected to Arduino Nano ESP32 3.3V
• gnd: Connected to Arduino Nano ESP32 GND
• scl: Connected to Arduino Nano ESP32 A5
• sda: Connected to Arduino Nano ESP32 A4

DHT22

• +: Connected to Arduino Nano ESP32 3.3V
• Out: Connected to Arduino Nano ESP32 D2
• -: Connected to Arduino Nano ESP32 GND

MQ135

• VCC: Connected to Arduino Nano ESP32 VIN
• GND: Connected to Arduino Nano ESP32 GND
• A0: Connected to Arduino Nano ESP32 D2
• D0: Connected to Arduino Nano ESP32 B0

Heart Pulse Sensor

• GND: Connected to Arduino Nano ESP32 GND
• VCC: Connected to Arduino Nano ESP32 VIN
• SIGNAL: Connected to Arduino Nano ESP32 A0

LED: Two Pin (green)

• cathode: Connected to Arduino Nano ESP32 GND
• anode: Connected to Arduino Nano ESP32 D13

Buzzer

• PIN: Connected to Arduino Nano ESP32 D12
• GND: Connected to Arduino Nano ESP32 GND

Code

No code is provided for this circuit.

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This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and code section. Each component is described, and its connections are detailed to ensure clarity and ease of understanding.