Hall effect sensor principles.
Hall effect sensor circuit diagram.
With this circuit we will be able to detect when any mangets in proximity of our circuit.
A sensor can be used to trigger a timer for a specific duty.
A hall effect sensor is used to trigger a timer ic.
When a magnetic source comes in close proximity to the hes it supplies a negative trigger pulse to the timer.
Hall effect sensor ic dn6848 from panasonic is the heart of the circuit.
A hall effect sensor is a sensor which detects magnetic fields.
The hall effect sensor explained above can be quickly configured through a few external parts for converting magnetic field into electrical toggling pulses for controlling a load.
1 kilo ohms resistor use as a current limiter for an led you can lower value if you want an led brighter.
The dn6848 has a built in hall effect sensor schmitt trigger circuit power supply regulator and temperature compensation circuits integrated to a single chip.
Resistor r1 acts as a positive bias for the for the input at pin 2.
Circuit diagram using hall effect sensor.
When the magnetic flux density around the sensor exceeds a certain pre set threshold the sensor detects it and generates an output voltage called the hall voltage v h.
The output signal from a hall effect sensor is the function of magnetic field density around the device.
Consider the diagram below.
The circuit diagram shown here is of a hall effect switch.