Simplest ultrasonic ANTISPY voice recording jammer based on ATTINY/ARDUINO module (PWM or optionally AD8933 signal generator) with audio amplifier or H-bridge+MOSFETs driving piezo ultrasonic transducers + coils
arduino ultrasonic diy attiny85 avr-gcc ultrasound digispark jammer 25khz ad9833 attiny13 pam8403 ir2104 rp2040 microphone-jammer voice-assistant-jammer ad8933 pam8610 tpa3116d2 voice-suppressor
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Updated
May 11, 2026 - C++