hey guys.. i need some help finding a schematic. for my school project i choose to do an alarm.. now i want to do a sort of alarm that when u pick it up it goes on.. i tried finding some car alarms but not much.. plz guys i need this asap. thanks
Box, battery, buzzer, and switch. (think Radio Shack) The switch could be the kind that protrudes through the bottom of the container...or a tilt switch...or ?
Do you want the alarm to not be resettable/defeatable once it's triggered?
my idea is this: an alarm that when u pick it up it goes on for like 10 seconds and resets it self until it is picked up again. i thought of using a siren instead of a buzzer. as for the switch i meant to use a motion detector? would that work? thanks much ken
Ya i thought of using a monostable with NE555 chips.. then i will need a NE555 astable right?
12V siren with two 9V batteries and a 12V voltage regulator?
No i don't have any motion detectors in mind :/ is there some sort of switch that reacts to vibrations or something?
i would like my alarm to go on and off just like a car alarm so ill use an astable as well?
ok so i will use a 12V buzzer they are quite loud right?
power source two 9V bateries with a voltage regulator.
i could make my own tilt switch? how? because i think i dont have tilt switches in my country :/
Just use a microswitch with a lever. Put a small hole in the end of the lever. Now make up another lever with a small nail on the end and put a piece of paper between the two. The second lever pushes on the microswitch via the paper. When the box is lifted, the paper falls away and the alarm cannot be turned off.
T-bro,
Is the intent to have the box automatically re-armed? So when the siren stops, it will start again if the box is moved again...or is it to be just a one-time alarm?
Ken