A switch and buzzer is easy enough, but the key component of this build is an actuated rocker switch. It’s basically a normal toggle switch with two additional terminals for a coil that can move ...

The white LED strip also runs on the same external 12-V DC supply. The following hardware diagram gives you a clear idea of the entire hardware structure. The warm white LED strip used here is a 5-m ...

When reed switch is opened, pin 2 of Arduino goes high with the help of the pull-up resistor R2, and the alert signal is available through the piezo-speaker PZ1 (not an active piezo-buzzer). At the ...