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Bluetooth-Controlled Robotic Car with L293D Motor Driver and LED Indicators

Image of Bluetooth-Controlled Robotic Car with L293D Motor Driver and LED Indicators

Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes a motor driver shield, Bluetooth module, gear motors, LEDs, resistors, a battery pack, and a DC barrel jack. The circuit is designed to control multiple gear motors and LEDs, with power supplied by a battery pack and a DC barrel jack. The Bluetooth module allows for wireless communication.

Component List

  1. L293D Driver Shield

    • Description: Motor driver shield capable of driving multiple motors.
    • Pins: 5v, GND, A0, A1, A2, A3, A4, A5, M+, M2, M1, M3, M4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, gnd, Aref, ser1, Servo2, +, -, 9v

  2. HC-05 Bluetooth Module

    • Description: Bluetooth module for wireless communication.
    • Pins: Key, VCC, TXD, RXD, State, GND

  3. Hobby Gearmotor with 48:1 Gearbox

    • Description: Gear motor with a 48:1 gearbox.
    • Pins: pin 1, pin 2

  4. LED: Two Pin (white)

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

  5. Resistor

    • Description: Resistor with a resistance of 200 Ohms.
    • Pins: pin1, pin2

  6. 2x 18650 Battery Pack

    • Description: Battery pack containing two 18650 batteries.
    • Pins: vcc, gnd

  7. Terminal Block KTB1 20A 6P

    • Description: Terminal block for connecting multiple wires.
    • Pins: 1, 2, 4, 5, 6, 3

  8. 2.1mm DC Barrel Jack

    • Description: DC barrel jack for power input.
    • Pins: switch, sleeve, center

Wiring Details

L293D Driver Shield

  • M+ is connected to center of the 2.1mm DC Barrel Jack.
  • GND is connected to gnd of the 2x 18650 Battery Pack.
  • M2 is connected to pin 1 of the Hobby Gearmotor with 48:1 Gearbox and cathode of the LED.
  • M2 is connected to pin 2 of the Hobby Gearmotor with 48:1 Gearbox and pin2 of the Resistor.
  • M1 is connected to pin 1 of the Hobby Gearmotor with 48:1 Gearbox and cathode of the LED.
  • M1 is connected to pin 2 of the Hobby Gearmotor with 48:1 Gearbox and pin1 of the Resistor.
  • M3 is connected to pin 1 of the Hobby Gearmotor with 48:1 Gearbox and cathode of the LED.
  • M3 is connected to pin 2 of the Hobby Gearmotor with 48:1 Gearbox and pin2 of the Resistor.
  • M4 is connected to pin 1 of the Hobby Gearmotor with 48:1 Gearbox and cathode of the LED.
  • M4 is connected to pin 2 of the Hobby Gearmotor with 48:1 Gearbox and pin1 of the Resistor.
  • 0 is connected to TXD of the HC-05 Bluetooth Module.
  • 1 is connected to RXD of the HC-05 Bluetooth Module.
  • + is connected to VCC of the HC-05 Bluetooth Module.
  • - is connected to GND of the HC-05 Bluetooth Module.

HC-05 Bluetooth Module

  • TXD is connected to 0 of the L293D Driver Shield.
  • RXD is connected to 1 of the L293D Driver Shield.
  • VCC is connected to + of the L293D Driver Shield.
  • GND is connected to - of the L293D Driver Shield.

Hobby Gearmotor with 48:1 Gearbox

  • pin 1 is connected to M2 of the L293D Driver Shield and cathode of the LED.
  • pin 2 is connected to M2 of the L293D Driver Shield and pin2 of the Resistor.
  • pin 1 is connected to M1 of the L293D Driver Shield and cathode of the LED.
  • pin 2 is connected to M1 of the L293D Driver Shield and pin1 of the Resistor.
  • pin 1 is connected to M3 of the L293D Driver Shield and cathode of the LED.
  • pin 2 is connected to M3 of the L293D Driver Shield and pin2 of the Resistor.
  • pin 1 is connected to M4 of the L293D Driver Shield and cathode of the LED.
  • pin 2 is connected to M4 of the L293D Driver Shield and pin1 of the Resistor.

LED: Two Pin (white)

  • cathode is connected to M2 of the L293D Driver Shield and pin 1 of the Hobby Gearmotor with 48:1 Gearbox.
  • anode is connected to pin2 of the Resistor.
  • cathode is connected to M1 of the L293D Driver Shield and pin 1 of the Hobby Gearmotor with 48:1 Gearbox.
  • anode is connected to pin2 of the Resistor.
  • cathode is connected to M3 of the L293D Driver Shield and pin 1 of the Hobby Gearmotor with 48:1 Gearbox.
  • anode is connected to pin2 of the Resistor.
  • cathode is connected to M4 of the L293D Driver Shield and pin 1 of the Hobby Gearmotor with 48:1 Gearbox.
  • anode is connected to pin2 of the Resistor.

Resistor

  • pin1 is connected to M1 of the L293D Driver Shield and pin 2 of the Hobby Gearmotor with 48:1 Gearbox.
  • pin2 is connected to anode of the LED.
  • pin1 is connected to M2 of the L293D Driver Shield and pin 2 of the Hobby Gearmotor with 48:1 Gearbox.
  • pin2 is connected to anode of the LED.
  • pin1 is connected to M3 of the L293D Driver Shield and pin 2 of the Hobby Gearmotor with 48:1 Gearbox.
  • pin2 is connected to anode of the LED.
  • pin1 is connected to M4 of the L293D Driver Shield and pin 2 of the Hobby Gearmotor with 48:1 Gearbox.
  • pin2 is connected to anode of the LED.

2x 18650 Battery Pack

  • vcc is connected to sleeve of the 2.1mm DC Barrel Jack.
  • gnd is connected to GND of the L293D Driver Shield.

2.1mm DC Barrel Jack

  • center is connected to M+ of the L293D Driver Shield.
  • sleeve is connected to vcc of the 2x 18650 Battery Pack.

Code

No code is provided for this circuit.