29 Jul '13, 9pm
Small wallet hack sounds an alarm on pickpockets
Finding a small magnetic window alarm Caleb quickly went to work on how to incorporate it into a wallet. The original alarm works using a buzzer and magnetic reed switch. The reed switch works by an applied magnetic field which in turn, opens or closes a switch. Furthermore, Caleb decided all he would need to change on the alarm would be the thickness of the design. Leaving the casing around the buzzer, which acts as an amplifier for it, the reed switch was de-soldered and moved to the side of the unit. This allowed the design to slim down just enough to make it unnoticeable while the wallet sits in your back pocket. The switch was placed in the wallet towards the spine and is easily accessible for the user to reach. His hack included using hot glue to secure the alarm to the wallet and a small magnet that gets secured in the back pocket.