I Built a CIA Spy Device (Laser Mic)

Video Description

In this video, I build a laser microphone, a device that can pick up sound from a distance using just a laser and receiver. This technology was first used during the Cold War by the KGB and is still used today. By shining a laser beam at a window, sound waves inside the room cause tiny vibrations that modulate the reflected light. Using a photodiode sensor and an amplifier circuit, we can convert those fluctuations into audio. I’ll be testing this homemade laser microphone to see if it actually works for listening through windows. Wiring---- Mono aux cable: Red to Out, Black to Ground (GND) Power cable: Red to VCC, Black to GND