How To: Build a Long Range Laser Spy System for Eavesdropping on Your Neighbors

Build a Long Range Laser Spy System for Eavesdropping on Your Neighbors

Eavesdropping from a distance can be tricky because it usually requires some sort of bug or transmitter. It's easy to transmit audio through lasers, but you can also use lasers to build a microphone that picks up audio from a distance.

Image via lucidscience.com

LucidScience built the Laser Spy System for about $20. To make your own, you'll need a cheap laser pointer, an NPN phototransistor, a headphone amp, and a few other small pieces listed below.

A light-to-sound circuit is installed in a small plastic box with the power switch, volume control, headphone jack, battery, and the phototransistor. The finished receiver is mounted to a tripod.

Image via lucidscience.com

It's pretty easy to get the laser to hit the right spot in a small room...

But it proves more difficult, but still possible, when the distance is further and you have windows to pass through.

You can find schematics, photos, and a very detailed step-by-step guide on how to build and use the microphone over on LucidScience.

Just updated your iPhone? You'll find new features for TV, Messages, News, and Shortcuts, as well as important bug fixes and security patches. Find out what's new and changed on your iPhone with the iOS 17.6 update.

Be the First to Comment

Share Your Thoughts

  • Hot
  • Latest