Tiny mute button

A small mute button to quickly mute or unmute yourself in virtual meetings

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A simple and easy to build mute button to quickly mute your sneeze or quickly unmute even when you weren't quite looking at the meeting screen any longer.

Tiny Mute Button

After much frustration during the pandemic with meeting solutions and their always shifting and hidden mute buttons. I decided to fix the issue for me and my team.

This little Hardware project is perfect for beginners and very easy to assemble.

Tools needed

  • Soldering Iron
  • 3D Printer (alternatively use an online printing service like shapeways)

How does it work?

The Microcontroller on the PCB simulates a keyboard. There are two ways to interact with the button, pressing the switch and touching the small capacitive surface on the back. Pressing the Switch will toggle its internal state and send either a key command used to mute or unmute the microphone. An on board LED represents its internal state.

In plain text: when you press it it goes red and your microphone is set to 0 volume, after pressing it again it goes out and sets your microphone volume to 100.

The capacitive surface on the back toggles the color wheel mode which is just a colorful effect which endlessly cycles all colors its RGB LED is capable of showing. Of course you can just touch the surface again to toggle this off. Also the red mute indicator state will still continue to overrule this.


3D Model for the Mute button stand

Standard Tesselated Geometry - 839.83 kB - 06/09/2022 at 20:33


  • 1
    Assemble the Hardware
    1. Slot switch onto pcb
    2. Solder the switch in place
    3. Mount key cap onto switch
    4. 3D print the PCB Shoe
    5. Slot PCB into Shoe
  • 2
    Flash the Firmware
    1. Setup Arduino
      1. Detailed instructions
      2. or here 
    2. Choose the Adafruit Neokey Trinkkey board from the boards list
    3. Copy code from here:
    4. and paste into the Arduino IDE
    5. Connect the board
    6. Press Upload
  • 3
    Configure the Software (OSX)
    1. Open Automate (Press: ⌘ + spacebar,,  Press: Enter)
    2. Create an new Automator action

    3. Create a new Quick Action by selecting the Cog icon and then click Choose

    4. In the Quick action wizard choose: "no input" for the "Workflow receives" dropdown

    5. Then choose "Run AppleScript" in the Action List on the left

    6. In the new Run AppleScript Textarea replace the content with "set volume input volume 0"

    7. Save your Workflow and name it mute_microphone

    8. Repeat steps 2 - 6 but use the script: "set volume input volume 100"

    9. Save and Name the second Workflow "unmute_microphone"

    10. in order for the Automator to be able to control your microphone you have to grant it permissions

    11. open the System Preferences and go To Security & Privacy

    12. Navigate to Accessibility

    13. Unlock the Screen (lock symbol on the lower left)

    14. Next press the + Button under the selection box on the right

    15. Navigate to the Applications folder in the new Finder Dialog and choose by selecting it and clicking Open

    16. Ensure that the Automater is now in the list and has a checkmark in front of it

    17. Now that Automator is allowed to modify your microphone we can setup your keyboard shortcut, for that open the Keyboard settings in the System Preferences

    18. Navigate to Shortcuts and choose Services on the left, then scroll down until you find mute_microphone and unmute_microphone

    19. Make sure both are checked and 

    20. set the Shortcut for Mute to: Ctrl + Option + Shift + Command + M

    21. as well as the Shortcut for Unmute to: Ctrl + Option + Shift + Command + U

View all 3 instructions

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