Crowtail- Hall Sensor

Description¶

The Crowtail- Hall Sensor uses the Allegro™ A1101 Hall-effect switches are next generation replacements for the popular Allegro312x and 314x lines of unipolar switches.It measures the Hall Effect, which is a production of a voltage difference across an electrical conductor, transverse to an electric current in the conductor as well as a magnetic field perpendicular to the current. The output of the continuous-time switch Hall sensor switches low(turns on) when a magnetic field (south polarity) perpendicular to the Hall sensor exceeds the BOP threshold, and it switches high( turn off) when the magnetic field disappears.

Model: CT0024HS

Features¶

• Crowtail Compatible Interface
• 400ns transition period for rise and fall.
• Continuous-time hall effect sensor
• Reverse battery protection

Specification¶

Dimensions(mm):20.0(L)x20.0(W)x6.8(H)

Usage¶

1.Hardware Connection

Connect the Hall Sensor to Digital port 4 of the Crowtail - Basic Shield using a 3 pin cable and connect Crowtail-LED to Digital Port 5.Then connect Arduino to PC by using a USB cable.

2.Upload the following sample sketch:

const int hall= 4;//PIN 4
const int led= 5;//PIN 5
void setup()
{
 pinMode(hall,INPUT); 
 pinMode(led,OUTPUT);
}
void loop()
{
  if(digitalRead(hall)==LOW){
  digitalWrite(led,HIGH);
 }
 else{
 digitalWrite(led,LOW);
 }
 delay(500);
}

3.When the magnet near the hall sensor, the LED will light up.

Resource¶

• Hall sensor Program
• Crowtail_Hall_Sensor_eagle_files