POLICE SIREN


Posted on Feb 5, 2014

Circuit used in Dietz siren-light police-car system gives distinctive tones. Position t of S1 produces slow continuous rise and fall. Position 3 produces fast rising and falling tone. Position 2 rises slowly to full pitch when point 1 is grounded, then decays at same rate when point 1 is ungrounded. Position 3 gives most noticeable tone for break-


POLICE SIREN
Click here to download the full size of the above Circuit.

in alarm on car. Terminal 1 goes to normally open door, hood, and other switches that complete circuit to ground when opened by intruder. Audio transistors and diode are general replacement types. -J. W. Crawford, The Ultimate Auto Alarm-Model II, CQ, Aug. 1971, p 54-57 and 96.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Wide-range-peak-detector
    Data-based Load Pull Amplifier
    Wireless alarm FM transmitter module
    ADJUSTABLE 1 5A STEP DOWN 1 5MHz SWITCHING REGULATOR
    ultra miniature transmitter
    Motion Sensor For Security Light Using PIR BS1600 PCB
    Implementation of Direct Output Buffers
    Fluid level control schematic diagrams
    SYNTHESIZER BASICS



    Top