• on Test & Measurement
  • Published in issue 2/2008 on page 73
About the article

1 MHz frequency counter using AT89C2051

design tip

This simple circuit is capable of measuring frequency up to 1 MHz at 1 Hz accuracy without an additional divider or prescaler circuit. The circuit employs an Atmel microcontroller type AT89C2051-24XX as the main part.
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