Car Headlight Alarm
Car Headlight Alarm
(OP)
Hello Guyz!
First of all I am new here and I found this section to be appropriated for submitting my question.
Well, I was Investigating on Car headlight Alarm and how it should sound a buzzer when the headlights are on?
I have attached the circuit diagram as well you might wanna have a look on it.
I found this while i was searching for ideas. Now all I need is lots of suggestion from you guyz regarding to how it can be improved such as; a pnp transistor has been used can it be improved with a comparator or with any other components?
Are there any other components of this circuit which can be improved?
How can I make it smaller? I have heard about the surface mount techniques as well as Integrated circuits which can make a circuit smaller But I don't have a clue how they work in reality?.
So, I would really appreciate if you guyz could give me a helping hand please?
First of all I am new here and I found this section to be appropriated for submitting my question.
Well, I was Investigating on Car headlight Alarm and how it should sound a buzzer when the headlights are on?
I have attached the circuit diagram as well you might wanna have a look on it.
I found this while i was searching for ideas. Now all I need is lots of suggestion from you guyz regarding to how it can be improved such as; a pnp transistor has been used can it be improved with a comparator or with any other components?
Are there any other components of this circuit which can be improved?
How can I make it smaller? I have heard about the surface mount techniques as well as Integrated circuits which can make a circuit smaller But I don't have a clue how they work in reality?.
So, I would really appreciate if you guyz could give me a helping hand please?





RE: Car Headlight Alarm
If you have a modern car with CAN bus connections you're gonna need a lot more than a PNP transistor.
RE: Car Headlight Alarm
TTFN

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RE: Car Headlight Alarm
Nope! actually, I did diploma in electronics. so, I thought why not take help of electronics to build an alarm for my car.
RE: Car Headlight Alarm
thanks mate, Can i have diagram for the simple circuit you mentioned here? I would make it on NI to see how it goes but I need a diagram to start with.
RE: Car Headlight Alarm
RE: Car Headlight Alarm
I still like Scotty's idea, (with the diode). Very clever use of the recognized standard car setup.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Car Headlight Alarm
RE: Car Headlight Alarm
I tried to make the proposed circuit with a diode to stop the current go backward. And this is what I come up with(Please refer to below circuit). There are two things wrong with the circuit;
1. The current is not going into the buzzer only the voltage does.
2. The current (12Amps) is flowing to the ground which it shouldn't do.
I need your help guyz as I might have put a wrong connection somewhere which is causing the circuit to flow the current to the ground.
RE: Car Headlight Alarm
RE: Car Headlight Alarm
Bill
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"Why not the best?"
Jimmy Carter
RE: Car Headlight Alarm
RE: Car Headlight Alarm
...
At least buy a fire extinguisher...
Mike Halloran
Pembroke Pines, FL, USA
RE: Car Headlight Alarm
You haven't included the courtesy lamp. Hint: the switch is on the negative side of the lamp. Anyway, why do you need to monitor both headlights?
RE: Car Headlight Alarm
2) Put the buzzer between them.
3) Put the bottom lamp switch on the right side its lamp.
4) Then run diode from left side of top lamp to buzzer.
5) From buzzer to right side of bottom lamp.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Car Headlight Alarm
RE: Car Headlight Alarm
Keith Cress
kcress - http://www.flaminsystems.com
RE: Car Headlight Alarm
a cross post. & yes i did understand and i'll try to make it on multisim.
RE: Car Headlight Alarm
RE: Car Headlight Alarm
RE: Car Headlight Alarm
Gunnar Englund
www.gke.org
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Half full - Half empty? I don't mind. It's what in it that counts.