Pocket Burglar Alarm

Step 11 Putting it in the Lighter Body

The nut to hold the battery board in place needs to be expoyed inside the lid. Use only a tiny amount of glue to do this or you may accidentally fill the nut with glue, and it's useless.


When everythiing is finally ready the last step is to epoxy the piezo to the side of the lighter. This will improve the volume of the device dramatically, if you just let the piezo rattle around inside then it won't be very loud at all.

Make sure the piezo is secure then begin to put the boards inside the lighter.  Once everything is inside take it for a test run. 


My favourite mode is the reverse detect, mostly hiding it places  (in a cupboard, in the fridge, in a shoe, and seeing people jump when it goes off).

But it does work as a burglar alarm too.

I've no idea about effective battery life. But the batteries used during the demo vid were some 'dead' batteries I took out of a laser pen, so fresh ones should last a while.

Also the batteries will last longer when using the 'reverse' modes. (because the IR sensor isn't drawing power while waiting)

Comments

[DrWilson]

Thanks Man Great Instructable! Im so lucky :)