Simple ultrasonic antispy voice recording jammer based on ATTINY13 / ATTINY85 with resistor ladder based DAC and 2 transistors (or PAM8403 module) driving piezo ultrasonic transducers. It prevents ...
Simple ultrasonic antispy voice recording jammer based on ATTINY13 / ATTINY85 with audio amplifier PAM8403 / TPA3116D2 module driving piezo ultrasonic transducers. It prevents from unauthorized human ...
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