For the most basic design, you need: a battery powering a circuit a spring-driven metal switch built into a door frame a magnet embedded in the door, lined up with the switch a separately-powered buzzer with a relay-driven switch. When the door is closed, the magnet pulls the metal ...
Most vehicles will tell you the status of your headlights on the dash, but there’s no default icon across manufacturers, so you really need to check out the owners manual to understand what your car is telling you. Automated systems are helpful, but they can never replace good, old common...
Acomputer control unitthat monitors everything and sounds the alarm — the "brain" of the system The brain in most advanced systems is actually a small computer. The brain's job is to close the switches that activate alarm devices — your horn, headlights or an installed siren — when cert...