Auto burglar alarm
The circuit operates by utilizing a dome light that is connected to a current source, designated as LI. When the dome light is powered on, it allows current to flow through the circuit, which energizes a reed switch. The reed switch, a type of electromagnetic switch, closes in response to the magnetic field created by the current, thereby completing the circuit and activating an alarm system.
In this configuration, the alarm serves as an alert mechanism, indicating a specific condition, such as unauthorized entry or an emergency situation. The activation of the alarm can be further enhanced by incorporating a shaker switch. This switch is designed to detect motion or vibration and, when triggered, sends a signal to the alarm system to activate it.
The integration of both the dome light and the shaker switch into the circuit provides a dual-layered approach to security. The dome light not only serves as a visual indicator but also plays a crucial role in the activation of the alarm. Meanwhile, the shaker switch adds an additional level of sensitivity, ensuring that any movement within the vicinity of the circuit will prompt an immediate response from the alarm system.
Overall, this circuit design effectively combines visual and motion detection elements to enhance security measures, making it suitable for various applications in residential or commercial settings.Dome light current-through LI closes reed switch and sounds alarm Shaker switch also activates alarm.
Related Circuits
Occasionally, a simple gated pulsed alarm is required. The circuit presented here utilizes only four components along with a piezo sounder, making it highly efficient in terms of simplicity. While it may not produce the most powerful output, it...
The base of Q1 is connected to the car's ignition circuit; the easiest point to make that connection is at the ignition switch fuse in the car's fuse panel. Also, one side of the piezoelectric buzzer is connected to...
An efficient automatic solar garden lights circuit with minimal components. The notable feature is that it operates entirely automatically, with the solar panel functioning as a light detector. The automatic solar garden lights circuit is designed to provide illumination in...
This circuit utilizes a combination of a silicon-controlled rectifier (SCR) and a relay to interrupt the ignition system unless a positive voltage is applied to the gate of the SCR. This configuration serves as an anti-theft device, as the...
The program utilizes the built-in analog-to-digital (AD) converter of the PIC16F874 microcontroller for sensing touch buttons. The PIC features eight AD ports, with seven designated for the touch buttons and one for light measurement. To receive DCF signals, a...
Simple add-on module, Switchable "Control-flat" option. In order to obtain good audio reproduction at different listening levels, a different tone control... The described module is a straightforward add-on designed to enhance audio reproduction across various listening levels. The "Control-flat" option...