How to Make a Burglar Alarm Mat
If a wire connects the circuit will turn on. If a wire is disconnected the circuit will turn off. Wait, that gave me an idea! So today I’ll show you how to make a burglar alarm mat or an alarm under a mat.
Things you’ll need: Aluminum foil, paper clips, a battery, 3 pieces of wire, 2 straws, tape, and a speaker with sound (I used a piezo buzzer).
- Connect two pieces of wire on the battery and connect the speaker to one end.
- Connect one more wire to the speaker.
- Make a chain out of paper clips and connect it with the other wire.
- Tape the straws on the ends of the foil and tape the paperclips between them.
- Connect the other wire to another piece of foil.
- Stack the foils on top on each other and step on it. The speaker will turn on. You could also hide it under a rug or a mat.
A wire is a single, usually cylindrical, flexible strand or rod of metal. Wires are used to bear mechanical loads or electricity and telecommunications signals. Wire is commonly formed by drawing the metal through a hole in a die or draw plate. Wire gauges come in various standard sizes, as expressed in terms of a gauge number. The term wire is also used more loosely to refer to a bundle of such strands, as in “multistranded wire”, which is more correctly termed a wire rope in mechanics, or a cable in electricity.
Wire comes in solid core, stranded, or braided forms. Although usually circular in cross-section, wire can be made in square, hexagonal, flattened rectangular, or other cross-sections, either for decorative purposes, or for technical purposes such as high-efficiency voice coils in loudspeakers. Edge-wound coil springs, such as the Slinky toy, are made of special flattened wire.