The reed switch is a small device and contains two ferrous materials inside.
Magnetic door sensor circuit diagram.
Frequency of tone can be adjustable by using an attached rv1 potentiometer.
Circuit diagram and explanation.
The circuit will also require a small size of permanent magnet to be fitted on the corner of the door in front of the reed switch that will be placed at the boarder of the door.
A wiring diagram is a streamlined conventional pictorial depiction of an electrical circuit.
Collection of magnetic door lock wiring diagram.
It shows the components of the circuit as simplified shapes and also the power as well as signal connections in between the gadgets.
When this device exposed to the magnetic field then ferrous materials inside.
Fix the hall sensor hs1 at the corner of door frame and the magnet on the door keeping its south pole s oriented towards the marked side of hs1.
In this magnetic door alarm circuit we have used a 555 timer ic in astable mode to generate a tone as an alarm.
Circuit diagram construction and working here reed switch acts as a sensor to detect the door position close open.
Align the hall sensor and magnet such that when the door is closed led1 lits steadily.
Assemble the circuit on a small pcb and enclose in a suitable box.
Here we have connected a 1k.