Re: Help for Uber Newbie - GPS trigger

On Feb 23, 1:06 pm, zsol...@xxxxxxxxx wrote:
Hello all,

I have a car alarm that I want to use the output (say the horn) to
trigger a GPS locator so that if the alarm is triggered, it will
notify by e-mail that there is an alarm situation. The problem is,
arming and disarming produces an output. I need some sort of circuit
that will look for a pulse longer than the chirp (or double chirp)
that indiciates arming / disarming. Did I mention I'm an Uber newbie?
Someone mentioned this may be possible with an RC circuit. The output
it would require would be negative, though if someone has a circuit
that creates a positive output, I can get around this with a relay.
Your help is greatly appreciated.

Pretty simple task to work out the pulse delay thingee. A one shot
multivibrator and some logic gates can seperate the short pules from a
long one. Of course these days an 8 pin PIC would probably be the best
solution. Now getting a pulse to send an E-mail is software magic that
I don't have a clue about, but of course I know it can be done.

.

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