🚗 Smart Car Robot Gear Motor (TT Motor, 1:48)

📌 Description

The TT motor is a small DC gear motor commonly used in smart car robots. It runs on 3V–6V and has a gear ratio of 1:48, which provides good torque for driving wheels.

⚠️ Safety Note

• The ESP32 (D1 R32) cannot supply enough current to drive the motor directly.
• Always connect the motor through a motor driver (L298N), which acts as a bridge between the microcontroller and the motor.
• The ESP32 only sends control signals to the L298N; the driver then powers the motor safely.

👉 Think of the L298N as the robot’s muscle controller — the ESP32 gives the orders, and the driver powers the motor.

🖥️ Code Explanation

import machine
import time

pin16 = machine.Pin(16, machine.Pin.OUT)   # Control pin A (to L298N IN1)
pin17 = machine.Pin(17, machine.Pin.OUT)   # Control pin B (to L298N IN2)

while True:
    pin16.value(1)   # Motor forward (IN1 = HIGH, IN2 = LOW)
    pin17.value(0)
    time.sleep(1)

    pin16.value(0)   # Motor backward (IN1 = LOW, IN2 = HIGH)
    pin17.value(1)
    time.sleep(1)

Step by Step

1. pin16 and pin17 → These pins send signals to the L298N motor driver.
2. pin16.value(1), pin17.value(0) → Motor spins forward.
3. pin16.value(0), pin17.value(1) → Motor spins backward.
4. time.sleep(1) → Each direction lasts for 1 second before switching.

👉 Together, this program makes the motor alternate between forward and backward motion.

✅ Conclusion of the Test

• If the motor spins forward for 1 second, then backward for 1 second, the program is working correctly.
• This test shows how the robot can control motor direction using the L298N driver.
• Later, you can expand this to control two motors for a full smart car, add PWM signals for speed control, or integrate sensors for autonomous driving.