3.5 Small Fan

Now we use the TA6586 to drive the DC motor to make it rotate clockwise and counterclockwise. Since the DC motor requires a relatively large current, for safety reasons, here we use a power module to supply power to the motor.

Schematic

sch_motor

Wiring

Note

  • Since DC motors require a high current, we use a Li-po Charger module to power the motor here for safety reasons.

  • Make sure your Li-po Charger Module is connected as shown in the diagram. Otherwise, a short circuit will likely damage your battery and circuitry.

wiring_motor

Code

Note

  • Open the 3.5_small_fan.py file under the path of kepler-kit-main/micropython or copy this code into Thonny, then click “Run Current Script” or simply press F5 to run it.

  • Don’t forget to click on the “MicroPython (Raspberry Pi Pico)” interpreter in the bottom right corner.

  • For detailed tutorials, please refer to Open and Run Code Directly.

import machine
import utime

motor1A = machine.Pin(14, machine.Pin.OUT)
motor2A = machine.Pin(15, machine.Pin.OUT)

def clockwise():
    motor1A.high()
    motor2A.low()

def anticlockwise():
    motor1A.low()
    motor2A.high()

def stopMotor():
    motor1A.low()
    motor2A.low()

while True:
    clockwise()
    utime.sleep(1)
    stopMotor()
    utime.sleep(1)
    anticlockwise()
    utime.sleep(1)
    stopMotor()
    utime.sleep(1)

Once the program is running, the motor will rotate back and forth in a regular pattern.

Note

  • If the motor is still spinning after you click the Stop button, you need to reset the RUN pin on the Pico W with a wire to GND at this time, and then unplug this wire to run the code again.

  • This is because the motor is operating with too much current, which may cause the Pico W to disconnect from the computer.

wiring_run_reset