Sampling rate in Arduino

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1

I am using a simple analog read with no delay function to read a sensor value. I would like a sampling rate of 1KHz, but I'm told Arduino Nano (which I am using) has a default sampling rate of 9Hz. I am told this rate can be modified by changing prescaler value. I would like guidance on how to do that so I can reach the range of 1KHz.

One more thing, would this sampling rate be easier to achieve on a ESP32 Wroom?

2

What type of sensor are you using ?

3

There is no fixed sampling rate associated with the analogRead() function, it's a one time reading.

So the "sampling rate" will depend on how fast your loop() runs

However it does take about 100 microseconds for an analogRead() to complete, so you could never do readings any faster than 10kHz

4

Source, please

5

Your topic has been moved to a more suitable location on the forum. The IDE 2.0 section is for problems with the IDE, not for problems with (nor for advice on) your project.

6

Won't believe me, its Chatgpt. Hate the bloody liar, but among its lies sometimes cute information slips through...

7

IR sensor

8

10Khz seems way faster than 1KHz. So I shouldn't worry about sampling rate?

9

As I said before,"there is no fixed sampling rate associated with the analogRead() function, it's a one time reading."

I think there may be some confusion about what sample rate means.
Explain to me what you think sample rate means.

10

@jim-p It means the rate at which ADC looks at the analog signal and converts it to digital?

11

What question did you ask it ?

12

OK
In that case it will take 100 microseconds for the ADC to convert an analog signal to digital.
When the sketch executes a analogRead(), it will stop the program for 100us until the conversion is done.

13

@jim-p That means 10KHz. Seems good enough.

But just out of curiosity because prescalar value is running in my mind...does changing the prescalar value have an effect?

@UKHeliBob can't recall, had that chat sometime back.

14

I don't see an Arduino function for changing the ADC prescalar

15

what does this do?
analogReadPrescale(16);

16

Where did you find that

17

chat, of course

18

I suggest you stop using chat
It is not a function for the UNO or nano

19

Sure. Thanks for your answers.

20

Why not ask your chatty friend ?