The circuit was constructed using a few components that is powered by a 9 V battery for sensing the presence of bugs transmitting within the frequency modulation range. Frequency Modulation (FM) – ...

Low-Cost, High-Sensitivity Devices Combine AM or AM/FM Comparators, RF Amplifier, and Local ×8 Circuit in a Small Package SAN JOSE, Calif.–April 21, 2003–Toshiba America Electronic Components, Inc.

There are many ways to build a radio receiver, but most have a few things in common, such as oscillators, tuned circuits, detectors, mixers, and amplifiers. Put those together in the right order and ...

[Dino] is back with another installment of his Hack a Week series, and in this episode he is taking on what he promises will be the last transistor-based project – at least for a little while. In the ...