Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes a Raspberry Pi 4B, multiple Hobby Gearmotors with 48:1 gearbox, L293D Motor Driver Expansion Boards, an Ultrasonic Sensor, and a 7.4V power source. The circuit is designed to control the motors and read data from the ultrasonic sensor using the Raspberry Pi.

Component List

1. Raspberry Pi 4B

   • Description: A powerful single-board computer used for various applications.
   • Pins: 3V3, 5V, GPIO2, GPIO3, GND, GPIO4, GPIO14, GPIO15, GPIO17, GPIO18, GPIO27, GPIO22, GPIO23, GPIO24, GPIO10, GPIO9, GPIO25, GPIO11, GPIO8, GPIO7, ID_SD, GPIO5, GPIO6, GPIO12, GPIO13, GPIO19, GPIO16, GPIO26, GPIO20, GPIO21, ID_SC, TR01_TAP, TR00_TAP, TR03_TAP, TR02_TAP, RUN, GLOBAL_EN

2. Hobby Gearmotor with 48:1 gearbox

   • Description: A small DC motor with a gearbox for increased torque.
   • Pins: pin 1, pin 2

3. L293D Motor Driver Expansion Board Mini 4CH 4 Channel Motor Drive

   • Description: A motor driver board used to control DC motors.
   • Pins: A-, A+, B-, B+, GND, VIN, VCC, IN1, IN2, IN3, IN4, EN1, EN2

4. 7.4V Power Source

   • Description: A power source providing 7.4V.
   • Pins: +, -

5. Ultrasonic Sensor

   • Description: A sensor used to measure distance by using ultrasonic waves.
   • Pins: +VCC, Trigger, Echo, GND

Wiring Details

Raspberry Pi 4B

• 5V is connected to:

  • +VCC of the Ultrasonic Sensor
  • VCC of the L293D Motor Driver Expansion Board (Instance 1)
  • VCC of the L293D Motor Driver Expansion Board (Instance 2)

• GND is connected to:

  • GND of the Ultrasonic Sensor
  • GND of the L293D Motor Driver Expansion Board (Instance 1)
  • GND of the L293D Motor Driver Expansion Board (Instance 2)

• GPIO14 is connected to IN3 of the L293D Motor Driver Expansion Board (Instance 1)

• GPIO15 is connected to IN4 of the L293D Motor Driver Expansion Board (Instance 1)

• GPIO18 is connected to IN1 of the L293D Motor Driver Expansion Board (Instance 2)

• GPIO23 is connected to IN2 of the L293D Motor Driver Expansion Board (Instance 2)

• GPIO24 is connected to IN3 of the L293D Motor Driver Expansion Board (Instance 2)

• GPIO25 is connected to IN4 of the L293D Motor Driver Expansion Board (Instance 2)

• GPIO11 is connected to IN2 of the L293D Motor Driver Expansion Board (Instance 1)

• GPIO8 is connected to IN1 of the L293D Motor Driver Expansion Board (Instance 1)

• GPIO5 is connected to Trigger of the Ultrasonic Sensor

• GPIO6 is connected to Echo of the Ultrasonic Sensor

Hobby Gearmotor with 48:1 gearbox (Instance 1)

• pin 1 is connected to A- of the L293D Motor Driver Expansion Board (Instance 1)
• pin 2 is connected to A+ of the L293D Motor Driver Expansion Board (Instance 1)

Hobby Gearmotor with 48:1 gearbox (Instance 2)

• pin 1 is connected to B- of the L293D Motor Driver Expansion Board (Instance 1)
• pin 2 is connected to B+ of the L293D Motor Driver Expansion Board (Instance 1)

Hobby Gearmotor with 48:1 gearbox (Instance 3)

• pin 1 is connected to A- of the L293D Motor Driver Expansion Board (Instance 2)
• pin 2 is connected to A+ of the L293D Motor Driver Expansion Board (Instance 2)

Hobby Gearmotor with 48:1 gearbox (Instance 4)

• pin 1 is connected to B- of the L293D Motor Driver Expansion Board (Instance 2)
• pin 2 is connected to B+ of the L293D Motor Driver Expansion Board (Instance 2)

L293D Motor Driver Expansion Board Mini 4CH 4 Channel Motor Drive (Instance 1)

• GND is connected to:

  • GND of the L293D Motor Driver Expansion Board (Instance 2)
  • - of the 7.4V Power Source

• VIN is connected to:

  • VIN of the L293D Motor Driver Expansion Board (Instance 2)
  • + of the 7.4V Power Source

L293D Motor Driver Expansion Board Mini 4CH 4 Channel Motor Drive (Instance 2)

• GND is connected to:

  • GND of the L293D Motor Driver Expansion Board (Instance 1)
  • - of the 7.4V Power Source

• VIN is connected to:

  • VIN of the L293D Motor Driver Expansion Board (Instance 1)
  • + of the 7.4V Power Source

7.4V Power Source

• + is connected to:

  • VIN of the L293D Motor Driver Expansion Board (Instance 1)
  • VIN of the L293D Motor Driver Expansion Board (Instance 2)

• - is connected to:

  • GND of the L293D Motor Driver Expansion Board (Instance 1)
  • GND of the L293D Motor Driver Expansion Board (Instance 2)

Ultrasonic Sensor

• +VCC is connected to 5V of the Raspberry Pi 4B
• GND is connected to GND of the Raspberry Pi 4B
• Trigger is connected to GPIO5 of the Raspberry Pi 4B
• Echo is connected to GPIO6 of the Raspberry Pi 4B

Code

No code is provided for this circuit.