Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various sensors, LEDs, a buzzer, a microcontroller, and a power supply. The circuit is designed to interface with an Arduino Nano and an ESP32 microcontroller, and it includes components such as infrared sensors, a temperature and humidity sensor, a gas sensor, and multiple LEDs. The circuit is powered by two 18650 Li-ion batteries regulated by a 7805 voltage regulator.

Component List

MKE-S11 IR Infrared Obstacle Avoidance Sensor

• Pins: SIG, 5V, GND
• Description: Infrared sensor used for obstacle detection.

DHT11

• Pins: DATA, GND, VCC
• Description: Temperature and humidity sensor.

18650 Li-ion Battery x 2

• Pins: +, -
• Description: Power supply for the circuit.

ESP32 (30 pin)

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

MQ135

• Pins: VCC, GND, A0, D0
• Description: Gas sensor for air quality monitoring.

7805

• Pins: Vin, Gnd, Vout
• Description: Voltage regulator to provide a stable 5V output.

Buzzer

• Pins: PIN, GND
• Description: Audio signaling device.

LED: Two Pin (red)

• Pins: cathode, anode
• Description: Red LED for visual indication.

Resistor

• Pins: pin1, pin2
• Description: 200 Ohms resistor used for current limiting.

Arduino Nano

• Pins: D1/TX, D0/RX, RESET, GND, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11/MOSI, D12/MISO, VIN, 5V, A7, A6, A5, A4, A3, A2, A1, A0, AREF, 3V3, D13/SCK
• Description: Microcontroller board based on the ATmega328P.

Wiring Details

MKE-S11 IR Infrared Obstacle Avoidance Sensor

• SIG connected to D3 of Arduino Nano
• 5V connected to 5V of Arduino Nano
• GND connected to GND of Arduino Nano

MKE-S11 IR Infrared Obstacle Avoidance Sensor

• SIG connected to D2 of Arduino Nano
• 5V connected to 5V of Arduino Nano
• GND connected to GND of Arduino Nano

DHT11

• DATA connected to D4 of Arduino Nano
• VCC connected to 5V of Arduino Nano
• GND connected to GND of Arduino Nano

18650 Li-ion Battery x 2

• + connected to Vin of 7805
• - connected to GND of 7805

ESP32 (30 pin)

• Vin connected to Vout of 7805
• GND connected to GND of 7805
• TX2 connected to D0/RX of Arduino Nano
• RX2 connected to D1/TX of Arduino Nano

MQ135

• D0 connected to A0 of Arduino Nano
• VCC connected to 5V of Arduino Nano
• GND connected to GND of Arduino Nano

7805

• Vin connected to + of 18650 Li-ion Battery x 2
• Gnd connected to GND of Arduino Nano
• Vout connected to VIN of Arduino Nano

Buzzer

• PIN connected to D5 of Arduino Nano
• GND connected to GND of Arduino Nano

LED: Two Pin (red)

• anode connected to pin1 of Resistor
• cathode connected to GND of Arduino Nano

Resistor

• pin1 connected to anode of LED
• pin2 connected to D8 of Arduino Nano

LED: Two Pin (red)

• anode connected to pin1 of Resistor
• cathode connected to GND of Arduino Nano

Resistor

• pin1 connected to anode of LED
• pin2 connected to D7 of Arduino Nano

LED: Two Pin (red)

• anode connected to pin1 of Resistor
• cathode connected to GND of Arduino Nano

Resistor

• pin1 connected to anode of LED
• pin2 connected to D6 of Arduino Nano

Documented Code

Arduino Nano Code (sketch.ino)

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

}

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

}

Additional Documentation (documentation.txt)

This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and documented code.