Arduino Security Alarm with Reed Switch

How does the security alarm circuit works? When power is turned on, the circuit goes into standby mode, and this condition is indicated by “SECURITY ALARM” in the LCD screen.Note that here a N/O reedswitch + bar magnet combination is used to detect any mishaps, and hence the reed switch should be in “closed”state at standby mode. When reed switch is opened, pin 2 of Arduino goes high with the help of the pu ...

Read more
Scroll to top