Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino UNO microcontroller, an LED, an LDR (Light Dependent Resistor), an MQ-2 gas sensor, a touch sensor, and a buzzer. The circuit is designed to interface these components with the Arduino UNO to perform various sensing and output functions.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

LED: Two Pin (white)

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

LDR

• Description: A Light Dependent Resistor used to detect light levels.
• Pins: A0, D0, GND, VCC

MQ-2

• Description: A gas sensor used to detect various gases including LPG, i-butane, propane, methane, alcohol, Hydrogen, and smoke.
• Pins: GND, VCC, ANALOG, Digital

Touch Sensor TTP233

• Description: A touch sensor module based on the TTP233 chip.
• Pins: GND, I/O, VCC

Buzzer

• Description: A simple buzzer used for sound output.
• Pins: PIN, GND

Wiring Details

Arduino UNO

• 5V: Connected to VCC of LDR, MQ-2, and Touch Sensor TTP233
• GND: Connected to GND of LDR, MQ-2, Touch Sensor TTP233, and Buzzer
• A0: Connected to ANALOG of MQ-2
• D9: Connected to PIN of Buzzer
• D8: Connected to anode of LED
• D7: Connected to D0 of LDR
• D6: Connected to I/O of Touch Sensor TTP233

LED: Two Pin (white)

• cathode: Connected to GND of Arduino UNO
• anode: Connected to D8 of Arduino UNO

LDR

• VCC: Connected to 5V of Arduino UNO
• GND: Connected to GND of Arduino UNO
• D0: Connected to D7 of Arduino UNO

MQ-2

• VCC: Connected to 5V of Arduino UNO
• GND: Connected to GND of Arduino UNO
• ANALOG: Connected to A0 of Arduino UNO

Touch Sensor TTP233

• VCC: Connected to 5V of Arduino UNO
• GND: Connected to GND of Arduino UNO
• I/O: Connected to D6 of Arduino UNO

Buzzer

• PIN: Connected to D9 of Arduino UNO
• GND: Connected to GND of Arduino UNO

Documented Code

Arduino UNO 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 the components used, their wiring details, and the code running on the Arduino UNO.