posted
Adding a pulsating horn honk feature, while the alarm is in alarming mode(going off) is a great idea in case the thief cuts the siren wires. Some vehicles such as european cars (any car that must have the ignition key turned to on, to operate the horn, will require two relays, and the horn positive and negative spliced. A qualified installer should do the installation. To test whether or not your car requires two relays, press the horn when ignition is off, it the horn sounds you need just one relay (in most cases). To have the alarm trigger the horn ONLY when it's alarming, your alarm MUST have an "alarming" output, which will trigger the relay(s) only when the siren is going off, not when arming or disarming. Using the alarming output(+)(pager, starter-cut..) which is constant power, and a pulsating output such as light flash(-), (put an IN4007 diode, if this or any output is being used for more than one purpose), you can provide power and pulsating ground, or vice versa to the car's horn. The sound of a siren typically is drowned out by city noise within a block, the car horn will be heard two to three blocks away, and you recognize the sound of your horn.
------------------ E.C. Wuz here
Posts: 1057 | From: Vancouver, British Columbia, Canada 'eh | Registered: May 1999
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posted
It is NOT necessary to have a horn output from your alarm to have horn honk. It is very easy to use a relay and a diode off the light flash Neg. to trigger the horn honk. YOu'd actually need 2 relays. One from the siren's output (to supply power for the horn honk ONLY when the siren is being supplied power) and the second would be on the light flash. You could set it up so the horn honks with the light flash, or between light flashes, depending on how you wire your relays.
[This message has been edited by Audiophyle (edited 11-21-1999).]
posted
I would imagine that a flasher unit(from local auto part store) will be required to avoid having the horn honk while arming and disarming? The flasher should be able to absorb a two second pulse before it relays a signal, just enough to absorb the arm/disarm chirp, that will trigger the horn honk relay?
------------------ E.C. Wuz here
Posts: 1057 | From: Vancouver, British Columbia, Canada 'eh | Registered: May 1999
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posted
Well, yes, you could use a flasher. I had this 2 relay setup on my old accord, and I did get a meep-meep of my horn while arming and disarming, but it actually kinda sounded cool, and you knew all was well with the world!
------------------ STILL waiting to hear a GOOD pair of HLCD's!!
If it dont fit, force it... if it breaks, it needed to be replaced anyway...
posted
best thing to do here is to use a diode and a relay.....use the alarms (+) siren output to trigger the relay Pin (85)...inline with the diode....then use the alarms GOUND WHEN ARMED or starter kill (-) output to trigger the ground on relay pin (86) diode isolate this wire also....
What this does is cuts the horn from honking while arming/disarming....and lets it honk when the alarm is if sounding from a violation.....i'll draw up a diagram and post it here...tonight..
Posts: 45 | From: Erie,PA usa | Registered: May 1999
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posted
Audiophyle, the flasher is not a grounding type, just a two post flasher, connected in series with the relay output, and the car horn positive. The flasher will need a while to charge up, and the arm/dis-arm is not enough to trigger it, unless it has been triggered before, and the chirp is longer, then the horn will sound momentarily. In case of where the two relay situation is required, by splicing the horn + & - and using the relay to complete the connection, will not allow the system to be shorted if the horn is pressed, while the alarm is going off. As opposed to "tapping" the relay to the positive and negative, which will short circuit the system.
------------------ E.C. Wuz here
Posts: 1057 | From: Vancouver, British Columbia, Canada 'eh | Registered: May 1999
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