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headlight alarm
Posted: Fri Oct 21, 2005 10:23 pm
by chunkz
okay, is there a way i can hook a buzzer up to go off if i leave my lights on when the engine is off/door open
cheers
Posted: Sat Oct 22, 2005 7:42 am
by festy
very simple example, will go off whenever the drivers door is opened while the headlights are on, stops when the door is closed again.
http://www.ee.washington.edu/circuit_ar ... ISCHEM_001
Posted: Sat Oct 22, 2005 8:28 am
by chunkz
seems hard...
i'll give it a go... go visit dick smith electronics...
cheers mate
Posted: Sat Oct 22, 2005 1:47 pm
by murcod
Just buy a 12V buzzer from Dick Smith and wire the +12v to a source that's +12v when the headlights are on (eg. dash backlighting) and the other side to your door switch. This will work providing your door switch earths out the interior light- most vehicles are wired this way.