Digital frequency counter

181

02:31:59

Frequency is measured in MHz.

published 11 years ago

hurz

11 years ago

RC oscillator is actually running at 120kHz, but you undersample it by using a 2.5kHz dummy reference which gives miltiplied by 30 (30 times seems to be EC oversampling rate) 30x2.5kHz = 75kHz.

njolico

11 years ago

I like it, but just so you know, i believe this is measured in MHz since 0.075MHz is 75kHz. Good job though.

Nikolay_S

11 years ago

@hurz, i deliberately overestimated the frequency of the oscillator. To see it, it is necessary to increase the measurement time.

Nikolay_S

11 years ago

@njolico, I've corrected.

hurz

11 years ago

I know, or how do you think i have measured the actually frequency 120kHz? Now display is corret, but simulation is still undersampled and incorrect (with 2.5kHz dummy source). Anyway its working. Keep it up!

ferlop

10 years ago

Now, this was my counter project, Darn. Great job because is not just another counter!

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