Answers

2015-12-26T12:42:04+05:30
U need -

Aluminum foil Electric buzzer1 BatteryTowel strips [ 2 inch]Copper wire [ 3 pieces, 12 inch[30 cm long]]Cardboard [ 2 square pieces...15cm by 15 cm]step-
     > wrap foil around 1 side of each piece of cardboard .tape the foil to the back of the cardboard.
> remove about 1 inch of coating from each end of each copper wire with the wire stripping tool.
> tape 1 wire to the centre of the foil side of 1 cardboard piece.
dnt tape over the copper end of the wire .
it needs to remain exposed.
> repeat step 3 with the other cardboard piece.
place the 2nd wire so the exposed ends will touch when the cardboard pieces are stacked together.
> twist n tape the loose end of 1 wire together with one of the buzzer connection.
>tape the loose end of the 2nd wire to the top of the battery .
> tape 1 end of the 3rd wire to the bottom of the battery.
> twist n tape the other end of the 3rd wire to the 2nd buzzr connection.
> tape the towel strips around the outside edge of 1 cardboard piece.
> place the foil sides of the cardboard together.
when u press on the center, it should complete the circuit n turn on the buzzr.
> place the cardboard pieces under a rug in front of ur door.
then jst wait for an intruder to step on the secret alarm.!!!
TIP-
use a battery that matches the voltage that the buzzr requires.
a weak batery won't turn on the alarm...
A battery that is too strong might burn it out...
HOPE IT CAN HELP U:)


0
2015-12-26T23:47:41+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Hi! Follow the steps:
Take the cardboard and wrap foil around one side of each cardboard.
Take the foil to the back of the cardboard.
Remove about 1 inch of coating from each wire.
Tape one wire to the center of the foil of one cardboard.
Don’t tape over the end of wire.
The wire needs to be exposed.
Repeat the previous steps and tape the wire.
Now twist and tape the loose end of one wire with the buzzer connections. Tape the end of second wire to the top of battery.
Now tape one end of the third wire to the bottom of battery.
Twist and tape the other wire to the third wire to the second buzzer.
Tape the towel strips around the edge of one cardboard piece.
Now place the foil sides of the cardboard together.
Press the center that turn on the buzzer easily.
Place the cardboard pieces under a rug in front of your door so that one can step on secret alarm. 
0