Cell phone jammer circuit diagram. Ijrit international journal of research in information technology volume 2 issue 4 april 2014 pg. Moreover l2 together with ql acts as an opto isolator totally isolating the telephone line from the rest of the. By using the same frequency as a mobile handset the cell phone jammer creates strong interference for communication between the caller and receiver.
In this case the word negative means earth or chassis of a car and we commonly refer to this as negative earth or negative chassis in the second diagram the output from a power supply has a positive 12. The power supply sometimes you will see a circuit as shown in the first diagram with 12v or 12v on the top rail and 0v or a negative sign or the word negative on the bottom rail. Best electronics mini projects for electronics enginnering students here we gave a complete information of the project along with circuit digaram code working process and step by step methods of making and how to do it.
Note that all these links are external and we cannot provide support on the circuits or offer any guarantees to their accuracy. Cell phone jammer is an electronic device that blocks transmission of signals between a cell phone and a base station. Ic 555 ic1 is used as a free running multivibrator whose frequency is set above 540 khz.
The diode rectifies the ringing signal to supply the operating power to the audio relaxation oscillator made up of li l2 rl r2 and c. Mobile spy cell phone monitoring software monitors your child or employees smartphone activity on android based smartphones and tablets. Here is a simple low range radio transmitter for transmission up to 25 metres.
367 373 psridhar rajan ijrit 369 fig. Miscellaneous electronic circuit diagrams circuit schematics. It is effective in blocking.