expandable transistor based burglar alarm


Posted on Feb 5, 2014

This transistor based alarm features automatic Exit and Entry delays - together with a timed Bell Cut-off and system Reset. Along with the Exit/Entry zone - the basic alarm board has one Instant Zone. This will be adequate in many situations. However - the modular design means that it`s easy to add as many zones as you like to the system. Details of a Four-Zone expansion module are provided..


expandable transistor based burglar alarm
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Frequency Meter using PC
    Power supply protection circuit
    TDA2030 18W + 18W Stereo Hi-Fi Audio Amplifier circuit and explanation
    hobby power supply circuit
    Small wattage Inverter (Inverter Circuit For Soldering Iron)
    charging circuit
    ATA5743 ATA5743 UHF ASK/FSK Receiver
    70 Interesting Circuits
    ULTRASONIC PEST REPELLER
    Enclosure for the Magnetometer v2.0
    Integrated operational amplifier tone control circuit of a simplified equivalent circuit a



    Top