Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes a motor and wheels, an IRFZ44N MOSFET, an MQ-3 gas sensor, a buzzer, a rocker switch, a 4 x AAA battery mount, and a resistor. The circuit is designed to control the motor and wheels based on the input from the MQ-3 gas sensor, with additional functionalities provided by the buzzer and the rocker switch.

Component List

1. Motor and Wheels

   • Pins: VCC, GND
   • Description: Motor and wheels assembly for movement.
   • Purpose: Provides mechanical movement.

2. IRFZ44N

   • Pins: Gate, Drain, Source
   • Description: N-channel MOSFET.
   • Purpose: Acts as a switch to control the motor and wheels.

3. MQ-3 Breakout

   • Pins: VCC, GND, DO, AO
   • Description: Gas sensor module.
   • Purpose: Detects gas levels and provides digital and analog outputs.

4. Buzzer

   • Pins: PIN, GND
   • Description: Audio signaling device.
   • Purpose: Provides audible alerts.

5. Rocker Switch

   • Pins: 1, 2
   • Description: On/Off switch.
   • Purpose: Controls the power supply to the circuit.

6. 4 x AAA Battery Mount

   • Pins: +, -
   • Description: Battery holder for four AAA batteries.
   • Purpose: Provides power to the circuit.

7. Resistor

   • Pins: pin1, pin2
   • Description: 200 Ohms resistor.
   • Purpose: Limits current flow.

Wiring Details

Motor and Wheels

• VCC: Connected to the Drain of the IRFZ44N MOSFET.
• GND: Connected to the GND of the MQ-3 Breakout, the GND of the Buzzer, and pin 1 of the Rocker Switch.

IRFZ44N

• Gate: Connected to pin2 of the Resistor.
• Drain: Connected to the VCC of the Motor and Wheels.
• Source: Connected to the negative terminal of the 4 x AAA Battery Mount and the VCC of the MQ-3 Breakout.

MQ-3 Breakout

• VCC: Connected to the Source of the IRFZ44N MOSFET.
• GND: Connected to the GND of the Buzzer, the GND of the Motor and Wheels, and pin 1 of the Rocker Switch.
• DO: Connected to pin 1 of the Rocker Switch.
• AO: Not connected in this circuit.

Buzzer

• PIN: Connected to pin1 of the Resistor.
• GND: Connected to the GND of the MQ-3 Breakout, the GND of the Motor and Wheels, and pin 1 of the Rocker Switch.

Rocker Switch

• Pin 1: Connected to the GND of the MQ-3 Breakout, the GND of the Buzzer, and the GND of the Motor and Wheels.
• Pin 2: Connected to the positive terminal of the 4 x AAA Battery Mount.

4 x AAA Battery Mount

• Positive (+): Connected to pin 2 of the Rocker Switch.
• Negative (-): Connected to the Source of the IRFZ44N MOSFET and the VCC of the MQ-3 Breakout.

Resistor

• Pin 1: Connected to the PIN of the Buzzer.
• Pin 2: Connected to the Gate of the IRFZ44N MOSFET.

Code

There is no microcontroller code provided for this circuit.

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