Will need
To make the device we need:
- Integrated timer chip NE555.
- Bipolar High Frequency Transistor BF495.
- Ceramic capacitor 2 pF; 7 pF; 3 pF; 47 pF; 30 pF.
- Electrolytic capacitor 1mkF, 63V.
- Resistor: 10 kOhm; 6.8 kΩ; 82 kΩ; Ohm; 6 kOhm.
- Copper wire with a cross section of 0.5 mm.
- Mini-slide switch, type SPDT.
- 3 mm LED (green).
- Two-pin plug connector.
- Connector battery type "crown" 9 volts.
- Battery 9 Volt.
Jammer circuit
There is nothing complicated. A high-frequency generator operating at a frequency of 50-120 MHz is assembled on the transistor. And the timer has a low-frequency square-wave generator for modulating the output radio signal.
The cell phone itself operates at a frequency of 2.4 GHz. So how does a jammer suppress a signal at such a high frequency? The fact is that the output generator does not have a bandpass filter at the output and all side harmonics are heard at all frequencies above.
There is one more trick: in fact, to be precise, the jammer does not jam the signal completely, it only interferes with the mobile phone, as a result, it cannot register on the network.
Printed circuit board
To get started, we will order or make a printed circuit board for our product on our own. You can make a printed circuit board with your own hands using laser-ironing technology.
Production of contour coils
From 0.5 mm thick copper wire, we will make three coils:
- The first is 4 turns;
- the second - 3 turns;
- the third - 15 turns.
The diameter of each coil is 5 mm.
For ease of manufacture, you can wind the wire around the tip of a screwdriver. At the first two ends of the windings we clean. The third coil will act as an antenna, so we need only one pin, we cut off the second.
Getting to the manufacture of the device
We install and solder the radio components according to the scheme.
We solder the wires from the battery connector to the contacts of the plug connector. Be sure to observe the polarity.
We connect the battery, turn on the toggle switch. A lit LED indicates muffler operation. We check the performance of the product.
After switching on, the "network is gone."
Customization
With good parts, the device starts working immediately. The only thing is that the frequency must be set with a variable capacitor at the maximum exposure distance.
Important! Possible consequences and disclaimer
Although the silencer’s power is lower than 10 mW, and the radius of action is less than 10 meters, its manufacture and use can harm others, or even worse, intelligence agencies, so think about the possible consequences.
Also, the manufacture of such devices may be prohibited in your country, keep this in mind first.
The article is written for informational purposes only and does not force you to take any action.
