GolfGTIforum.co.uk
Model specific boards => Golf mk3 => Topic started by: dazmatic on 03 August 2011, 20:22
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Ok, I don't know about anybody else on here, but there has been several time where I/my other half have either killed or nearly killed the battery because the lights were left on when we got out of the car.
Now, I've just finished fitting something to my car to act as a warning when the lights are left on, which, is such an incredibly simple (could be even simpler too) method of creating a warning which I was that impressed with, I felt it necessary to share.
Quite simply, I created a circuit which incorporates a buzzer hidden away under the dash which when the lights are left on, and ignition is off, the buzzer will sound as a reminder.
The circuit is simple, works and made using odds and sods in my components bin.
Also, the potentiometer is used as feedback between the output, input and capacitor to make the opamp oscillate. If the pot is varied in resistance, then the output varies also meaning the tone of the piezo varies too from a low hum, all the way to a squeel beyond your hearing range so you can choose something that's the most pleasant.
First off, the circuit itself.
If you head over to http://tinyurl.com/4478sq8 (http://tinyurl.com/4478sq8) it'll run a Java app which shows the circuit in detail.
How does the circuit work? The PNP transistor does most of the work here. The base of the transistor is pulled low by the 100k resistor turning the transistor on. If the ignition is on, then there is a voltage on the base of the PNP turning the transistor off regardless of the pulldown. When the transistor is on and the headlights are on, this mean the rest of the circuit is provided with power so long as the +ive and -ive supply pins of the opamp are connected to 12v and ground respectively.
The opamp in this case is an LME49710 (free sample from national.com) and is wired up to make it oscillate, the output of which is enough to power a small piezo or buzzer and because power and trigger is supplied by the transistor, when the headlights/ignition are both off it doesn't draw any power.
(http://dc384.4shared.com/img/wo-ixeb7/DSCF0429.JPG) (http://www.4shared.com/photo/wo-ixeb7/DSCF0429.html)
This picture shows the wiring coming from the ignition, familiar sight no?
My plan was to use a series of piggybacks as there were several wires coming off the single original cable which is the black and blue one which is only live when the ignition is on.
(http://dc416.4shared.com/img/4vXhu1qk/DSCF0432.JPG) (http://www.4shared.com/photo/4vXhu1qk/DSCF0432.html)
Afterwards, a series of piggybacks. It's not pretty, but got to be better than soldering wires on top of each other and using them shoddy blue blocks!
(http://dc384.4shared.com/img/9PqkqDrj/DSCF0434.JPG) (http://www.4shared.com/photo/9PqkqDrj/DSCF0434.html)
This picture shows the connector used at the headlights and the green/grey cable that I cut to provide power to the buzzer circuit. This cable is ONLY on when the headlights are switched to either sidelights alone, or headlights and so ideal for the buzzer.
(http://dc381.4shared.com/img/DrNi-cXK/DSCF0435.JPG) (http://www.4shared.com/photo/DrNi-cXK/DSCF0435.html)
and the piggyback used with the headlight switch.
(http://dc356.4shared.com/img/clVTPqQ_/DSCF0430.JPG) (http://www.4shared.com/photo/clVTPqQ_/DSCF0430.html)
Buzzer circuit boxed up, holes drilled to allow the sound out and mounted to the bottom of the kickplate out of the way.
So, I hope this is of some help to someone, as much as it was to me anyway. No more dead batteries!
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Is a buzzer like this not standard?... Relay in the fuse box does it..
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Is a buzzer like this not standard?... Relay in the fuse box does it..
there is a buzzer if you open the door and your lights are left on. think you missing the buzzer relay i think it is. would be realy WICKED INNIT for one that goes
PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING PING
FARKING irritating NART!!!
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Is a buzzer like this not standard?... Relay in the fuse box does it..
Yes, why does this thread exist?
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Is a buzzer like this not standard?... Relay in the fuse box does it..
Yes, why does this thread exist?
I had one on my 1996 GTI
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I also had one in my 96 and currently have one in my 97.
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If the car doesn't have the headlight buzzer relay, can it be retrofitted out of interest?
Can't see why not, as I think the fuse boxes are all the same, and there was a space for the relay?
My 97 has one, but my old 94 Match didn't.
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all my mk3's had the buzzer fitted (driver & gti's)....can someone get a number from there relay as I might have a spare or two? (as I dont own a mk3 now, I wouldnt like to guess which one from my bag or stuff is correct)
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You know, I didn't even think that they were a standard thing. Thought just never crossed my mind!
I'd been creating a few circuits lately and thoroughly enjoyed this one cause it was so simple and worked (not to mention now being unemployed, it was something to do)
But yeah, you're right, there is a buzzer relay (not fitted to my car), No. 36 which sounds when doors are open and lights.
However, I think I'd rather stick to mine because it only sounds when the lights are left on which is all I wanted.
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my mk3 has one. it's an early 95 one.
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Well, my 93 16v hasn't, my brothers 94 8v hasn't and my sisters 96 16V hasn't either.
So, as far as I was aware, it didn't exist :laugh:
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I have a revised guide, hope you don't mind. :smiley:
Ok, I don't know about anybody else on here, but there has been several time where I/my other half have either killed or nearly killed the battery because the lights were left on when we got out of the car.
Now, I've just finished fitting something to my car to act as a warning when the lights are left on, which, is such an incredibly simple (could be even simpler too) method of creating a warning which I was that impressed with, I felt it necessary to share.
Quite simply, I created a circuit which incorporates a buzzer hidden away under the dash which when the lights are left on, and ignition is off, the buzzer will sound as a reminder.
The circuit is simple, works and made using odds and sods in my components bin.
Also, the potentiometer is used as feedback between the output, input and capacitor to make the opamp oscillate. If the pot is varied in resistance, then the output varies also meaning the tone of the piezo varies too from a low hum, all the way to a squeel beyond your hearing range so you can choose something that's the most pleasant.
First off, the circuit itself.
If you head over to http://tinyurl.com/4478sq8 (http://tinyurl.com/4478sq8) it'll run a Java app which shows the circuit in detail.
How does the circuit work? The PNP transistor does most of the work here. The base of the transistor is pulled low by the 100k resistor turning the transistor on. If the ignition is on, then there is a voltage on the base of the PNP turning the transistor off regardless of the pulldown. When the transistor is on and the headlights are on, this mean the rest of the circuit is provided with power so long as the +ive and -ive supply pins of the opamp are connected to 12v and ground respectively.
The opamp in this case is an LME49710 (free sample from national.com) and is wired up to make it oscillate, the output of which is enough to power a small piezo or buzzer and because power and trigger is supplied by the transistor, when the headlights/ignition are both off it doesn't draw any power.
(http://dc384.4shared.com/img/wo-ixeb7/DSCF0429.JPG) (http://www.4shared.com/photo/wo-ixeb7/DSCF0429.html)
This picture shows the wiring coming from the ignition, familiar sight no?
My plan was to use a series of piggybacks as there were several wires coming off the single original cable which is the black and blue one which is only live when the ignition is on.
(http://dc416.4shared.com/img/4vXhu1qk/DSCF0432.JPG) (http://www.4shared.com/photo/4vXhu1qk/DSCF0432.html)
Afterwards, a series of piggybacks. It's not pretty, but got to be better than soldering wires on top of each other and using them shoddy blue blocks!
(http://dc384.4shared.com/img/9PqkqDrj/DSCF0434.JPG) (http://www.4shared.com/photo/9PqkqDrj/DSCF0434.html)
This picture shows the connector used at the headlights and the green/grey cable that I cut to provide power to the buzzer circuit. This cable is ONLY on when the headlights are switched to either sidelights alone, or headlights and so ideal for the buzzer.
(http://dc381.4shared.com/img/DrNi-cXK/DSCF0435.JPG) (http://www.4shared.com/photo/DrNi-cXK/DSCF0435.html)
and the piggyback used with the headlight switch.
(http://dc356.4shared.com/img/clVTPqQ_/DSCF0430.JPG) (http://www.4shared.com/photo/clVTPqQ_/DSCF0430.html)
Buzzer circuit boxed up, holes drilled to allow the sound out and mounted to the bottom of the kickplate out of the way.
So, I hope this is of some help to someone, as much as it was to me anyway. No more dead batteries!
1. Pull a buzzer out of a scrapyard GTI.
2. Place in your vehicle.
Job done.
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Bwaha, probably easier :D
But this was done for kicks mostly. Not to mention, I didn't even realise they existed!