Cell Phone Jammer

How to Make your own Cell Phone Jammer

Understanding its Working :

Disrupting a cell phone is the same as jamming any other type of radio communication. A cell phone works by communicating with its service network through a cell tower or base station. Cell towers divide a city into small areas, or cells. As a cell-phone user drives down the street, the signal is handed from tower to tower.

A jamming device transmits on the same radio frequencies as the cell phone, disrupting the communication between the phone and the cell-phone base station in the tower.

It's a called a denial-of-service attack. The jammer denies service of the radio spectrum to the cell-phone users within range of the jamming device.

The actual range of the jammer depends on its power and the local environment, which may include hills or walls of a building that block the jamming signal. Low-powered jammers block calls in a range of about 30 feet (9 m). Higher-powered units create a cell-free zone as large as a football field. Units used by law enforcement can shut down service up to 1 mile (1.6 km) from the device.

Steps To Make a Cell Phone Jammer :

Step 1 -

Use an old aluminium box as a frame for the jammer and old UHF connectors from Motorola cell phone as input/output.

Step 2 -

Attach RF connectors to the circuit.

Step 3 -

Use a nine volt battery and voltage regulator to supply all components. Place the battery inside and separated by the foamed plastic from the other components.

Place the power on/off switch on the top.