A standard electret microphone can detect sub-audio "sounds" when some simple equalization circuitry is added.

A defective parking sensor can be expensive. Here is a small circuit that you can use to quickly and easily detect defective ...

In Q4 FY25, our consolidated revenue increased by 5.1% compared to the same quarter in the previous financial year, contributing to full-year growth of 25.9%. Our retail segment, representing 81.5 ...

The Indian Navy and Kirloskar Oil Engines Limited (KOEL) have signed a project sanction order under Make - I, for the design and development of a 6MW Medium Speed Marine Diesel Engine, on 2nd ...

One major win was locating the original J-FET Tek used in the oscillator’s AGC circuit. One part that’s proven more elusive is the potentiometer that Tek used to adjust the frequency ...

Everything seems straightforward enough on the breadboard – an op-amp to boost the signal from the condenser mic, a somewhat low ... issue with the breadboard circuit first; did the distortion ...