For detecting the magnetic field

 

Sensors 3144E Hall switch sensor:

Module functions:

1, small size, 32mm X 14mm

2, mounting screw hole of 3mm

3, you can use a DC power supply 3-5.5v

4, real-time output signal from the hall

5, after the approval of the comparator output signal more stable finish

6, the output capabilities of the comparator 16mA

7, power indicator

8, the comparator output indicator light

9, control distance is measured: less 1CM

Module Interface Description:

VCC: positive power supply 3.3-5V

GND: negative

DO: digital output module, the output of a low magnetic induction

AO: Hall output voltage in real time