AH49E線性霍爾感測器模組

感測器模組簡介

https://sensorkit.en.joy-it.net/index.php?title=KY-035_Bihor_magnetic_sensor_module

PRODUCTS DETAILS

https://www.ahest.net/hall-switch/liner-hall-sensor-ah49e.html

◆ Outline

The magnetic sensor will pass linear area /nonlinear area/ saturation area during the magnetic induction increases. When there is no magnetic field that applies in sensor (B=0), when the output voltage of sensor is only half of Vcc (Vcc/2); when “N” pole faces mark surface of sensor, and be closed to it gradualy (B→-∞）,the output voltage begins to decrease, and the voltage doesn’t reduce with the increased magnetic field; When the “S” pole of magnet faces the mark surface of the sensor and is closed to sensor gradualy （B→+∞）, the output voltage of sensor begins to increase, and it doesn’t increase with the increased magnetic field after it reaches saturation voltage.The magnetic and electric transfer characteristic curve of linear sensor is shown as the figure:

電路圖

程式列表

Blockly

Python

"""

EPY Sensor

-----------------

AIN0 AO

3V3 VCC

GND GND

"""

from machine import Pin,ADC

from machine import Switch

import utime

from machine import RTC

adc_buf = None

adc0 = None

KeyA = None

rtc = None

adc0 = ADC(Pin.board.AIN0)

KeyA = Switch('keya')

rtc = RTC()

while True:

adc_buf = adc0.read()

print('Analog Value (0 to 4095):' + str(adc_buf))

if (KeyA.value()) == True:

break

utime.sleep_ms( 400 )

執行結果