How to make a personalized cabinet alarm device by yourself
People will put some private or important things in the cabinet, but they are afraid that people will look through them randomly.
But installing a lock will completely destroy the appearance of the cabinet. At this time, you can try to install a more personalized alarm device.
You can connect the battery and the buzzer component together, and then install a trigger component.
Find a ballpoint pen cap and cut a relatively small hole in it.
Install a screw on the pen cover, and then solder the screw and the power cord together.
Install a nut on the screw, just expose it slightly.
Solder the exposed part to the power cord.
Install the screw into the pen cover. When it slides off the middle insulating piece, it will directly contact the smaller screw below to connect the power supply.
Paste a trip wire on the cabinet door and connect the other side to the insulation piece.
And insert the insulation piece into the penPut it on top of the cutting opening.
Finally, install the alarm component on the component.
