Circuit Documentation

Summary

This document provides a detailed description of a circuit that includes a motor and wheels, a rocker switch, an MQ-3 breakout sensor, a 4 x AAA battery mount, a MOSFET, a piezo speaker, and a resistor. The circuit is designed to control the motor and wheels using the rocker switch and the MOSFET, while the MQ-3 sensor and piezo speaker provide additional functionality.

Component List

1. Motor and Wheels

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

2. Rocker Switch (SPST)

   • Pins: 1, 2
   • Description: Single Pole Single Throw (SPST) switch for controlling the circuit.

3. MQ-3 Breakout

   • Pins: VCC, GND, DO, AO
   • Description: Alcohol sensor module.

4. 4 x AAA Battery Mount

   • Pins: +, -
   • Description: Battery holder for four AAA batteries.

5. MOSFET

   • Pins: Gate, Drain, Source
   • Description: Metal-Oxide-Semiconductor Field-Effect Transistor for switching.

6. Piezo Speaker

   • Pins: pin1, pin2
   • Description: Speaker for sound output.

7. Resistor

   • Pins: pin1, pin2
   • Description: Resistor with unspecified resistance value.

Wiring Details

Motor and Wheels

• VCC is connected to the Drain of the MOSFET.
• GND is connected to:
  • Pin 2 of the Piezo Speaker
  • Pin 1 of the Rocker Switch
  • VCC of the MQ-3 Breakout

Rocker Switch (SPST)

• Pin 1 is connected to:
  • Pin 2 of the Piezo Speaker
  • GND of the Motor and Wheels
  • VCC of the MQ-3 Breakout
• Pin 2 is connected to the + of the 4 x AAA Battery Mount.

MQ-3 Breakout

• VCC is connected to:
  • Pin 2 of the Piezo Speaker
  • Pin 1 of the Rocker Switch
  • GND of the Motor and Wheels
• GND is connected to:
  • - of the 4 x AAA Battery Mount
  • Source of the MOSFET
• DO is connected to:
  • Pin 1 of the Resistor
  • Pin 1 of the Piezo Speaker

4 x AAA Battery Mount

• + is connected to Pin 2 of the Rocker Switch.
• - is connected to:
  • Source of the MOSFET
  • GND of the MQ-3 Breakout

MOSFET

• Gate is connected to Pin 2 of the Resistor.
• Drain is connected to VCC of the Motor and Wheels.
• Source is connected to:
  • - of the 4 x AAA Battery Mount
  • GND of the MQ-3 Breakout

Piezo Speaker

• Pin 1 is connected to:
  • Pin 1 of the Resistor
  • DO of the MQ-3 Breakout
• Pin 2 is connected to:
  • Pin 1 of the Rocker Switch
  • GND of the Motor and Wheels
  • VCC of the MQ-3 Breakout

Resistor

• Pin 1 is connected to:
  • Pin 1 of the Piezo Speaker
  • DO of the MQ-3 Breakout
• Pin 2 is connected to the Gate of the MOSFET.

Code

There is no code provided for this circuit.