tpa3116d2

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mcore1976 / antispy-jammer

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

Updated May 11, 2026
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mcore1976 / rp2040-parametric-directional-speaker

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This is the cheapest and the simplest in the world Parametric Directional Speaker based on RP2040 board, TPA3116D2 amplifier and set of 10+ ultrasonic transducers

raspberry pico rp2040 raspberry-pico rp2040-zero tpa3116d2 parametric-directional-speaker ultrasonic-speaker directional-speaker xh-m543 ultrasound-speaker parametric-speaker ultrasonic-microphone parametric-microphone

Updated Aug 25, 2025
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