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Fake Car Alarm Circuit - Sahte araç alarmı

Konusu 'Elektronik Devreler' forumundadır ve uydudoktoru tarafından 23 Şubat 2015 başlatılmıştır.

  1. uydudoktoru

    uydudoktoru Tanınmış Üye Yönetici Yönetici

    13 Haziran 2009
    Ödül Puanları:
    This is a very simple circuit to make using a 555 component and is recommended for the electronics beginner.

    This page outlines how to make a simple theft detterant which may be just as effective. The idea is to have a flashing red led indicate that your car is protected. This device can protect your vehicle from potential thieves – it makes it look like your car has an armed alarm system installed, which causes thieves to pass by your car in search of an easier target.

    The project can be broken down into three steps. Constructing the circuit, powering the circuit, and installation.

    Constructing the Circuit
    The circuit is build around a 555 IC.

    Nr. Name Description
    1 Ground Ground Reference (0V)
    2 Trigger OUT rises, and interval starts, when this input falls below 1/3 VCC
    3 Output This output is driven to +VCC or GND.
    4 Reset A timing interval may be interrupted by driving this input to GND.
    5 Vcc +5 to +15v
    6 Discharge Open collector output; may discharge a capacitor between intervals
    7 Threshhold The interval ends when the voltage at THR is greater than at CTRL.
    8 Control Voltage Control” access to the internal voltage divider (by default, 2/3 VCC).
    Circuit Schematics
    Annotation Value
    C1 10uF
    C2 0.1uF
    D1 LED
    P1 CONN_2
    R1 10k
    R2 150k
    R3 330 Ohm
    U1 LM555N
    The Printed Circuit Board


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