Protect your privacy! This is the simplest and cheapest ultrasonic microphone jammer that you can build yourself!
Yes, it jams even iPhones from couple of meters!
check the project page here : github.com/mco...
The jammer version that I am showing in the video uses 25kHz ultrasonic transducers ( "T25", 20 for 15$ ) , audio amplifier module with TPA3116D2 (less than 5$ ) and Digispark board (3 $)
You need to power it from 12V Li-Ion battery
Before you start asking questions see the details of the last version of this jammer which is less audible and has improved jamming capabilities :
the connections diagram : github.com/mco...
the Arduino Digispark code : raw.githubuser...
To make this device you need :
- Digispark board with ATTINY85 chip you can buy it f.ex. here www.aliexpress... ,
- signal generator module AD9833 which you can buy f.ex. here : www.aliexpress... ,
- mono audio amplifier TPA3116D2 module ( XH-M543 ) which you can buy f.ex. here : www.aliexpress... , ATTENTION ! other modules like TPA3118 or TPA3110 DO NOT WORK PROPERLY WITH TRANSDUCERS !!!
- set of AT LEAST 10 ultrasonic transducers/transmitters/sensors for 25kHz which you can buy here : www.aliexpress...
- 12V-24V at least 1A power source
- colour cable to interconnect all of these devices.
- The capacitors on the diagram are optional (use it only when the audio amplifier does not work and you need to block distortion on GND/VCC lines )
You have to follow my design and use TPA3116D2 board as an amplifer because some others like f.ex. TPA3110 seem not to work with ultrasonic transducers (TPA3110 gives only clicking sound instead of ultrasounds) and TPA 3118 gives too low signal (also do not use it ). Also the ultrasonic transducers/transmitters/sensors MUST be for 25kHz. These for 40kHZ simply will NOT work.
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#ALCHNL #ATTINY #ARDUINO
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27 сен 2024
