| Jurnal Angkasa Tahun 2010 Oleh Freddy Kurniawan |
ANALISIS KETEPATAN PENGHITUNG FREKUENSI DENGAN METODE PENCACAHAN BERBASIS MIKROKONTROLER AT89S52 |
| ABSTRAK |
| A frequency counter is an electronic instrument, or component of one, that is used for measuring frequency. Frequency counters usually measure the number of oscillations or pulse per second in a repetitive electronic signal. A digital-signal frequency counter, can measure the number of positive-going-transition or the number of negative-going-transition of signal in a set of period time. This 2-channles AT89S52 microcontroller-based frequency counter works by using two counters, which accumulates the number of negative-going-transitions occurring within one second period. This frequency counter can measure frequency from 1 Hz to 920 kHz. The upper limit of frequency can be extended up to 2 MHz by adding a frequency divider. The analysis of the accuracy of measuring presented in this article can support to determine the number of digit to display. Keywords : microcontroller-based frequency counter, negative-going-transitions, accuracy. |
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