/diy/ - Do It Yourself

dismantle an alarm clock, get some sheet steel (the flat steel stuff, don't know word for it) only get small amount of sheet steel 20cm by 20cm.
glue the number pad onto one side, have the wires running make sure at least half of them are visible on the same side of number pad. connect them to battery, get your self some string or cord, drill two holes on the top side of the sheet steel tie the cord so it acts like a necklace, wear the alarm clock hidden under coat, or shirt (depending what you wear) then when someone jumps you you pull up shirt or coat revealing the alarm clock that looks like a bomb. have a switch so when you press it the clock screen begins to count down from say 15 seconds. now this fool is mugging you you reveal the ''bomb'' he freaks out (if he doesn't realize their is a timer begin counting down and hint to the numbers) this mugger is now running from you.
or just buy one of these pic relaated