Graffiti zigbee intelligent door and window induction wifi low power switch anti-theft anti-theft reminder door magnetic alarm principle

When the magnet is close to the spring, the magnetic field of the magnet attracts the spring to the magnet, and the dynamic and static switches are turned on, so that the system is in an early warning state. When the magnet is removed, the spring loses its magnetic field and returns to its original position. At this point, the moving contact and the static contact are disconnected, and the alarm is started.

After receiving the alarm signal, IC 1 generates an audio signal internally through the R 1 oscillating resistor and sends it to VT 1 through the signal output terminal for power amplification. The amplified audio signal is coupled into a higher voltage audio signal through the booster inductance, which drives the buzzer to send out a loud alarm signal.

Graffiti Intelligence is a leading technology company dedicated to making life smarter. Graffiti provides a cloud platform that can intelligently connect everything and create an interconnected development standard.