Simple Cell Jammer
Checkout this cell Jammer or we can say Dirty transmitter. A Dirty transmitter transmits junk within the cellular phone bands. This model is good enough to knock out pesky cell phones for about 10 to 15 feet, just perfect for a quite cup of coffee in your favorite coffee shop. Via : EEweb “The 555 timer [8 pin] IC simply makes a noise. It’s coupled via C4 [electrolytic] to modulate