среда, 15 декабря 2010 г.
$5 Dollar Burglar Alarm
I'm going to show you how to make a burglar alarm for under $5 bucks, and a few household items!
3 regular size rubber bands
1 jumbo paper clip
3 regular size paper clip
1 push pin thumbtack
1 AA battery
1 peice of thread or kite string *6 to 8 inches*
1 spare piece of thin cardboard
An aluminum pie pan
The only thing l paid for was this
"AA" Battery Holder from Radio Shack (270-401A) $0.99
3VDC Mini Buzzer from Radio Shack (273-053A) $3.49
if you do not see the video - link