ic 555 motorcycle alarm circuit

Posted on Feb 5, 2014

Any number of normally-open switches may be used. Fit `tilt` switches that close when the steering is moved or when the bike is lifted off its side-stand or pushed forward off its centre-stand. Use micro-switches to protect removable panels and the lids of panniers etc. The alarm`s standby current is virtually zero - so it won`t drain your battery

ic 555 motorcycle alarm circuit
Click here to download the full size of the above Circuit.

. Once activated - the rate at which the siren switches on and off is controlled by R7, R8 & C4. For example, increasing R7 will make the sound period longer - while increasing R8 gives longer silent periods. The circuit is designed to use an electronic Siren drawing 300 to 400mA. It`s not usually a good idea to use the bike`s own Horn because it can be easily located and disconnected. However - if you choose to use the Horn - remember that the alarm relay is too small to carry the necessary current. Connect the coil of a suitably rated relay to the "Siren" output. This can then be used to sound the Horn, flash the lights etc. The circuit board and switches must be protected from the elements. Dampness or condensation will cause malfunction. Connect a 1-amp in-line fuse AS CLOSE AS POSSIBLE to your power source. This is VERY IMPORTANT. The fuse is there to protect the wiring - not the alarm. Exactly how the system is fitted will depend on the make of your particular machine - so I`m unable to provide any further help or advice in this regard.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Continuity in Circuit Tester
    15 x 7 LED display with PIC16F628
    Oscillators for Buzzers and telephone Earpieces
    board anticipation equivalent diagram
    FM Moulator with IC 555
    Difficulty with Common Emitter Amplifier
    FM Receiver Circuit
    airbag diagnostic code 51 ford f150
    Variable PSU
    Undervoltage delay tripping a circuit