Fake a car alarm

[tim_l_012]

Hi All,

If you have just read my other thread, this one will be built to work with the other half..

I want to basically set up a cheap circuit, which can flash the indicators on and off, like what a car alarm would. I was also thinkin about a small beeper or whatever you call it (someone correct me on this), which could make the appropriate car alarm sound.

I suspect I need a timer of some sort, basically my input would be a 12v pulse from a button hooked up to my central locking.

The lights would come on for say half a second, go off for quarter, back on for half then off.

If you could provide any way of doing this I would be very grateful.

Thanks in advance,

 

[Nigel Goodwin]

Hi All,

If you have just read my other thread, this one will be built to work with the other half..

I want to basically set up a cheap circuit, which can flash the indicators on and off, like what a car alarm would. I was also thinkin about a small beeper or whatever you call it (someone correct me on this), which could make the appropriate car alarm sound.

I suspect I need a timer of some sort, basically my input would be a 12v pulse from a button hooked up to my central locking.

The lights would come on for say half a second, go off for quarter, back on for half then off.

If you could provide any way of doing this I would be very grateful.

Thanks in advance,

There are many ways of doing it, you could use a chain of 555 timers, an oscillator feeding counters - probably the simplest way is to use a PIC. One 8 pin PIC, a driver transistor feeding a relay - and that's about it! - apart from writing the software of course!.