Electrical circuit of car alarm
Main components:
* Alarm Control Unit (ECU): The central processing unit responsible for processing signals and controlling other components.
* Sensors:
* Shock/vibration sensor
* Tilt/motion sensor
*Door sensors
* Hood sensor
* Luggage sensor
* Sirens:
* Alarm siren
* Silent siren (alarm pager)
*Key rings:
* Main key fob (two buttons)
* Additional key fobs (one button)
* LED indicator: indicates alarm status (activated, disabled)
Connection diagram:
Nutrition:
*12V power supply (car battery)
* Power cord (connects to “+”)
* Ground wire (connects to “-“)
Sensors:
* The sensors are connected to the ECU either directly or via a signal wire (two wires).
* Each sensor has two wires: input and output.
* Signals from the sensors are sent to the ECU, which analyzes them and takes appropriate actions.
Sirens:
* Sirens are connected to the ECU by two wires: positive and negative.
* The ECU can turn the sirens on and off by sending appropriate signals.
Keychains:
* Key fobs communicate with the ECU via radio frequencies.
*When you press a button on the key fob, a signal is sent to the ECU.
* The ECU recognizes the signal and takes the appropriate action, such as activating or disabling the alarm.
LED indicator:
* The LED indicator is connected to the ECU with two wires: positive and negative.
* The ECU can turn the LED on and off by sending appropriate signals.
Additionally:
*Alarms may also include additional features such as:
* Automatic arming/disarming
* Central locking control
* Immobilizer
* GPS tracker