Back to Arduino Support

If you experience noise with the digital-to-analog converter on GIGA R1 WiFi

When running a sketch on your GIGA R1 WiFi board that accesses data from a USB drive, you may experience noise in the digital-to-analog converter (DAC) output. It can be particularly noticeable when outputting audio, where a slight hum may be discernible.

Reducing audible noise by adding a capacitor

Audible noise can be reduced by connecting a 10 µF capacitor between the AREF and GND pins.

Follow these steps:

  1. Turn off the board.

  2. Make sure when adding components or changing your circuits the board is unpowered.

  3. Connect the positive capacitor lead (longer) to AREF.

  4. Connect the negative capacitor lead (shorter) to GND.

    10 µF Capacitor between AREF and GND

The noise should no longer be noticeable. If it persists, try using a 100uF capacitor instead.

Tip

Test it out using the Audio playback example.

  • Last edited:
Was this article helpful?
Do you want to contribute? Visit the Github repository
Return to top

Didn’t find what you were looking for?

Arduino Docs

Tutorials, data sheets, guides and other technical documentation.

Arduino Forum

Connect with the community, get help with your project, and discuss everything Arduino.

Arduino Discord

There are a lot of Arduino enthusiasts who are more than willing to help out. Head over Discord to start a discussion.

Contact Arduino

Need help with a product, need to make an exchange, or can't find a question answered? Email us and we'll answer as soon as possible.