Showing posts with label DIY. Show all posts
Showing posts with label DIY. Show all posts

Tuesday, August 26, 2025

The Arduino Bug - Want to make one?

In this project, we are going to build an audio bug using Arduino and NRF24L01

This audio spy bug is highly customizable and can be easily integrated with other devices and systems. The NRF24L01 module allows transmission over specific channel, ensuring that our transmissions remain private up to a level. 

This device is perfect for monitoring a baby room, keeping an eye on a pet, or even for professional surveillance. With its small size and easy portability, this audio spy bug is a must-have for anyone in need of discreet and reliable audio recording. more  video
Our variation on the theme... more

Thursday, March 30, 2023

Weekend Project - Two-Tube Spy Transmitter

From the look around his shack Helge Fykse (LA6NCA) really has a thing for old technology. The typewriter, the rotary phones, the boat-anchor receiver — they all contribute to the retro feel of the space, as well as the circuit he’s working on... The tiny transmitter is built into a small metal box, which is stuffed with the resistors, capacitors, and homebrew inductors needed to complete the circuit... Almost every component used has a vintage look... But does it work? Of course it does! more