How do you find the sampling frequency of Arduino?

How do you find the sampling frequency of Arduino?

7 Answers. For a 16 MHz Arduino the ADC clock is set to 16 MHz/128 = 125 KHz. Each conversion in AVR takes 13 ADC clocks so 125 KHz /13 = 9615 Hz. That is the maximum possible sampling rate, but the actual sampling rate in your application depends on the interval between successive conversions calls.

What is the sampling rate of Arduino Mega?

Calculation of Arduino’s sampling rate The ADC clock of Atmega328P is 16 MHz divided by a ‘prescale factor’. The prescale is set by default to 128 which leads to 16MHz/128 = 125 KHz ADC clock. Since a single conversion takes 13 ADC clocks, the default sampling rate is ~ 9600 Hz.

What is the frequency of Arduino Mega?


Board PWM Pins PWM Frequency
Uno, Nano, Mini 3, 5, 6, 9, 10, 11 490 Hz (pins 5 and 6: 980 Hz)
Mega 2 – 13, 44 – 46 490 Hz (pins 4 and 13: 980 Hz)
Leonardo, Micro, Yún 3, 5, 6, 9, 10, 11, 13 490 Hz (pins 3 and 11: 980 Hz)
Uno WiFi Rev2, Nano Every 3, 5, 6, 9, 10 976 Hz

What is Arduino sampling rate?

since the crystal frequency of the Arduino uno board is 16MHz. 1 cycle takes 6.25 x 10-8 sec therefore 13 clock cycles will take 8.125 x 10-7 time to convert the analog data into digital form. Therefore the frequency of it will be 1.23MHz. And this will be the sampling frequency.

Is Arduino Mega 32 bit?

The Arduino Due is a microcontroller board based on the Atmel SAM3X8E ARM Cortex-M3 CPU. It is the first Arduino board based on a 32-bit ARM core microcontroller.

What is the difference between Nyquist rate and Nyquist frequency?

The Nyquist rate is the minimal frequency at which you can sample a signal without any undersampling. It’s double the highest frequency in your continous-time signal. Whereas the Nyquist frequency is half of the sampling rate.

How do you avoid aliasing?

The solution to prevent aliasing is to band limit the input signals—limiting all input signal components below one half of the analog to digital converter’s (ADC’s) sampling frequency. Band limiting is accomplished by using analog low-pass filters that are called anti-aliasing filters.

Is 96kHz better than 48khz?

According to many people, higher sample rates aren’t necessary. Yet others insist higher sample rates are audibly better. In my experience, with audio recorded at 96kHz, no one can reliably tell the difference between that audio being played back at 96kHz or sample-rate-converted down to 44.1kHz and played back.