Before you enter:
This item is illegal in certain locations. It is only demonstrating how these items work and what only a few dollars at a electronic store can build.
This also Not a Cell phone jammer. Jamming a Cell phone is similar on its principle, but totally a different build, you need a range from 800MHz to 900MHz. You need an OP amp and a few other parts and formulas
F = 1/(4*R1*C)*(R2/R3)
R3/R2 (noticed it flipped) is the frequency range
850MHz = 1/(4*R1*C)*(1/50MHzS)
You must know the fact that they are illegal in certain areas and MUST NOT rant about it and say they are illegal.
Step 1: Precausion
I am not Liable for any offenses.
Why This Works:
The Radio Jammer sends out a EM wave at a frequency. The wave is then broadcast throughout an area. Radios will receive this wave (when tuned to that frequency) and It will block the other wave that is broadcast from a station.
So far in my building, I have only been able to block 1 station using one OSCILLATOR.
Have tried adding 1.5v onto a 9v battery. This unexplainably let me listen to another channel on the channel I was blocking.
Step 2: What You Need
An Oscillator, The heart of the Radio Jammer. The frequency you choose will be the frequency you jam. FM radio is in MegaHertz. Example, If you want to block 100.0, then use a 100Mh Oscillator. It may be a bit confusing. I have a 97.7 MHz that says 97M70000 and a 50 MHz that says 50.0000 MHz.
A 9 volt battery
An On/Off Switch
A Circuit Board (Optional, but recommended)
Soldering (Used with the Circuit Board)
9 Volt Battery: found it somewhere, but i think there maybe $1.00
Wiring: found in workshop, i got a lot for $1.00
On/Off Switch: $1.50
Circuit Board: $0.50