Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to control two DC motors using a Raspberry Pi Pico W microcontroller and an L298N motor driver. The circuit also includes two IR sensors for obstacle detection and a step-down buck converter to regulate the power supply from a 12V battery.

Component List

1. Raspberry Pi Pico W

   • Description: A microcontroller board based on the Raspberry Pi RP2040 microcontroller chip.
   • Pins: GP0, GP1, GP2, GP3, GP4, GP5, GP6, GP7, GP8, GP9, GP10, GP11, GP12, GP13, GP14, GP15, GP16, GP17, GP18, GP19, GP20, GP21, GP22, GP26, GP27, GP28, GND, 3V3 OUT, 3V3_EN, VSYS, VBUS, RUN

2. L298N DC Motor Driver

   • Description: A dual H-Bridge motor driver that allows control of two DC motors.
   • Pins: OUT1, OUT2, 12V, GND, 5V, OUT3, OUT4, 5V-ENA-JMP-I, 5V-ENA-JMP-O, +5V-J1, +5V-J2, ENA, IN1, IN2, IN3, IN4, ENB

3. DC Motor (Motor 1)

   • Description: A standard DC motor.
   • Pins: pin 1, pin 2

4. DC Motor (Motor 2)

   • Description: A standard DC motor.
   • Pins: pin 1, pin 2

5. Battery 12V

   • Description: A 12V battery used as the power source.
   • Pins: +, -

6. Step Down Buck Converter

   • Description: A DC-DC converter that steps down voltage from 12V to 5V.
   • Pins: IN +, IN - GND, OUT +, OUT - GND

7. IR Sensor (Sensor 1)

   • Description: An infrared sensor used for obstacle detection.
   • Pins: out, gnd, vcc

8. IR Sensor (Sensor 2)

   • Description: An infrared sensor used for obstacle detection.
   • Pins: out, gnd, vcc

Wiring Details

Raspberry Pi Pico W

• 3V3 OUT connected to vcc of both IR sensors.
• GND connected to OUT - GND of the Step Down Buck Converter and gnd of both IR sensors.
• VSYS connected to OUT + of the Step Down Buck Converter.
• GP9 connected to out of IR Sensor 2.
• GP8 connected to out of IR Sensor 1.
• GP7 connected to ENB of the L298N DC Motor Driver.
• GP6 connected to ENA of the L298N DC Motor Driver.
• GP5 connected to IN4 of the L298N DC Motor Driver.
• GP4 connected to IN3 of the L298N DC Motor Driver.
• GP3 connected to IN2 of the L298N DC Motor Driver.
• GP2 connected to IN1 of the L298N DC Motor Driver.

L298N DC Motor Driver

• OUT1 connected to pin 2 of DC Motor 1.
• OUT2 connected to pin 1 of DC Motor 1.
• OUT3 connected to pin 2 of DC Motor 2.
• OUT4 connected to pin 1 of DC Motor 2.
• 12V connected to IN + of the Step Down Buck Converter and + of the 12V Battery.
• GND connected to IN - GND of the Step Down Buck Converter and - of the 12V Battery.

DC Motor 1

• pin 1 connected to OUT2 of the L298N DC Motor Driver.
• pin 2 connected to OUT1 of the L298N DC Motor Driver.

DC Motor 2

• pin 1 connected to OUT4 of the L298N DC Motor Driver.
• pin 2 connected to OUT3 of the L298N DC Motor Driver.

Battery 12V

• + connected to 12V of the L298N DC Motor Driver and IN + of the Step Down Buck Converter.
• - connected to GND of the L298N DC Motor Driver and IN - GND of the Step Down Buck Converter.

Step Down Buck Converter

• IN + connected to 12V of the L298N DC Motor Driver and + of the 12V Battery.
• IN - GND connected to GND of the L298N DC Motor Driver and - of the 12V Battery.
• OUT + connected to VSYS of the Raspberry Pi Pico W.
• OUT - GND connected to GND of the Raspberry Pi Pico W.

IR Sensor 1

• vcc connected to 3V3 OUT of the Raspberry Pi Pico W.
• gnd connected to GND of the Raspberry Pi Pico W.
• out connected to GP8 of the Raspberry Pi Pico W.

IR Sensor 2

• vcc connected to 3V3 OUT of the Raspberry Pi Pico W.
• gnd connected to GND of the Raspberry Pi Pico W.
• out connected to GP9 of the Raspberry Pi Pico W.

Code

No code is provided for this circuit.