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Adam Loboda
2020-06-07 21:37:03 +02:00
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@@ -4,6 +4,7 @@ Very simple 433MHz (EUROPE/ASIA) or 315MHz (USA) RF jammer for keyless cars and
433/315 MHz key fob jammer based on ATTINY13A and FS1000A RF transmitting module.
PIN B2 of ATTINY13A is connected to DATA IN of FS1000A transmitter board.
Both ATTINY13 and FS1000A are connected to 5V power supply. You can attach several FS1000A to the same ATTINY13 for better results as well as modify FS1000A board by adding regulated capacitor 5pF-30pF for fine tuning jammed frequiencies (see videos below)
Please notice that SAW Oscillator used in FS1000A modules has 433.92MHz and has to be fine tuned to jamm particular frequency.
The source code for ATTINY13 is generating set of square waves - 50 sequences of 3 pulses each with different width to put enough noise on 433/315Mhz frequency. The device can effectively jam all wireless keys in 100 meter range f.ex. in underground garage.