Arduino nano sensor reading is very noisy

Projects General Guidance
1

I have a KY 39 heart rate sensor which worked without any noise issue with Arduino Uno. However, when I connect the same sensor to Arduino nano and run it from the same program, it gives a lot of noise! any suggestions to tackle this or the reason behind this behaviour?
Thanks in advance.

2

Hi,
Welcome to the forum.

Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.

Is this thread part of your project?

http://forum.arduino.cc/index.php?topic=564684.0

Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?

Thanks.. Tom... :slight_smile:

3

You need to post your code and put it within the code tags </>
You also need to give a schematic showing your wiring.

Have you tried putting the sensor back onto the Uno?
Are you feeling ok?

4

Try drawing the curtains and turning out the lights.

These sensors can be sensitive to fluctuations in ambient light.