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Posted - Jan 02 2004 : 2:44:16 PM
My truck is equipped with an alarm and remote starter. Every morning when I start it, my horn chirps twice, and then when I unlock my vehicle, it chirps again. Leaving at 5:30am, my neighbors love me. I want to build a circuit to disable this, yet if the alarm were to go off, allow it too. I have the concept, but lack the electronics know-how to design the circuit. If anyone could read below and offer any tips, I would appreciate it.
Essentially, when an initial voltage pulse from the system attempts to honk the horn, the connection to the horn should be broken, and Timer1 (1 to 2 seconds) is initiated. Once Timer1 expires, if additional voltage pulses are received (the alarm is going off), the connection to the horn would be "closed" allowing the horn to honk and Timer2 (5 minutes) would be initiated. Timer2 would disable Timer1 from being triggered again until it expires. Lastly, if for some reason the circuit were to fail, it should be set up to allow the horn to honk.
In theory, it sounds simple enough to me, but again, I lack the knowledge to design it. My biggest problem is that the trigger is the same connection I want to be switching. If anyone has any suggestions or perhaps alternatives, I would appreciate it.
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| 7 L A T E S T R E P L I E S (Newest First) |
| kenmce |
Posted - Feb 15 2004 : 6:12:26 PM
quote:
My truck is equipped with an alarm and remote starter. Every morning when I start it, my horn chirps twice, and then when I unlock my vehicle, it chirps again. Leaving at 5:30am, my neighbors love me. I want to build a circuit to disable this, yet if the alarm were to go off, allow it too. I have the concept, but lack the electronics know-how to design the circuit. If anyone could read below and offer any tips, I would appreciate it.
There is another route you could take if you fail with the circuit idea. Get a wimpy little horn and install it inside the car, under the back seat maybe. Hook up your lead(s) from the starter and alarm to the new horn. It will be less loud for the neighbors than your regular horn but should still bug the heck out of anyone who is rooting around inside your car looking for something to steal.
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| BEatonNo1 |
Posted - Jan 17 2004 : 8:27:46 PM
well if thats the case, then that is probibly the way to go. however if it is the starter and alarm in one then it will be a bit more complicated.
stopping the horn from beeping after you get out would be fairly simple. just build a timer to cut the horn connection after the car is off then reconnect it after the alarm is done beeping. stopping it from beeping before you start.
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| da-g-dog |
Posted - Jan 17 2004 : 6:52:50 PM
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that would work to, but then if someone were to break into your car there would be no noise.
Notice that he said a "separate unit", presumeably meaning two different devices. So if he unplugged the lead from the remote start unit, the alarm woud still be plugged in and would therefore still do its thing.
hike master kyle |
| BEatonNo1 |
Posted - Jan 16 2004 : 11:41:29 PM
that would work to, but then if someone were to break into your car there would be no noise.
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| kenmce |
Posted - Jan 16 2004 : 8:39:42 PM
If the remote starter is a separate unit, you could locate the lead that runs from the starter to the horn and unplug it. This would get rid of half the noise.
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| Aaron Cake |
Posted - Jan 03 2004 : 10:42:12 AM
My Insight has the "horn chirper" and I hate it. Like all we need is more noise pollution. Sucks to silently pull up and park, then let everyone in the parking lot know you're there when you close the doors. 
This to me sounds like a perfect job for a microcontroller. It could supply the "brain" that could get annoying to replicate with descrete components. The BASICStamp is a microcontroller made by Parallax which can be programmed in BASIC. Very simple to use, and could hand this task easily with probably only the addition of an external relay, opto-isolator (to sense the "honk" signal) and a voltage regulator.
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| cirvin |
Posted - Jan 02 2004 : 4:44:06 PM
you could build Aaron's remote circut and just press the remote when you don't want the horn going off.
There is hope in the Future... |
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