HOW to Detect Magnetic Field with Kidspico

Flow

Assembly

Required Parts

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Step 7

Completed

Wiring Diagram

Test Code

Open 4.3Magnetic field detection.py and click .

'''
 * Filename    : Magnetic field detection
 * Thonny      : Thonny 4.1.4
 * Auther      : http//www.keyestudio.com
'''
from machine import Pin
import time

hall = Pin(8, Pin.IN)
led = Pin(11, Pin.OUT)
while True:
    value = hall.value()
    print(value, end=' ')
    if value == 0:
        led.on()
        print("A magnetic field")
    else:
        led.off()
        print("There is no magnetic field")
    time.sleep(0.1)

Code Explanation

Conceive:

When the Hall sensor detects a magnetic field, a low power(0) will be output, and the white LED lights up. If there is no magnetic field, high(1) will be output, and the LED goes off.

Code structure:

1. Initialization. Set the pins of the Hall sensor and the white LED module.

2. Loop.

   Print the digital value of the power level of the Hall sensor.

   Determine whether the value equals 0 (0 means a magnetic field is detected).

   • value = 0: the white LED lights up.

   • value ≠ 0: the white LED goes off.