The friend’s radio didn’t come with a frequency display, and buying the add-on would cost more than the radio did. So [Todd] has set out to build an Arduino frequency counter for a Kenwood TS ...

Computer engineer Thiery Guennou based in France has created a new Arduino compatible precision frequency counter 5 or 120 MHz. The inspiration behind the Arduino board was to build an open ...

Tsunami is a signal generator built on the Arduino ... frequency up to nearly 8MHz. A peak detector allows it to measure signal amplitude and there is a phase detector. By connecting the output of the ...