This tutorial shows on how you can make your own spy bug that will transmit audio through a FM transmitter that will require a few parts from an electronic supply store and a fair amount of experience ...

What we like most about [GreatScott’s] project videos is that he not only shows making them but also the calculations for selecting parts and the modifications along the way. This time he’s made a ...

Here is a very simple telephone broadcaster or transmitter which can be used to eavesdrop on a telephone conversation. The circuit can also be used as a wireless telephone amplifier. One important ...