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An annoying CAPS LOCK warning buzzer

Glen on the Photons, Electrons, and Dirt blog updates a build on an annoying caps lock warning buzzer.

In my first post on the Annoying CAPS LOCK Warning Buzzer, I concluded with a list of future improvements to make to the project. Those updates are now implemented and the Annoying CAPS LOCK Warning Buzzer is more robust than ever. Read on to find out more about the improvements.

Goals for Improvements

The list of new features and improvements is pretty short:

  1. Include a ground plane on both sides of the board. Route +5V as traces.
  2. Add some basic ESD protection.
  3. Add a button and LED to use with a USB bootloader and firmware update utility to apply firmware updates.
  4. Make the button and LED accessible without disassembling the buzzer.

The updated schematic

Updated schematic. The U2, SW1, R2, and USER1 LED are new to this version of the design.

All design files are in a caps-lock-buzzer repository on github.

The v2 schematic and board files:

The Fusion 360 Archive and STL files for the enclosure:

The updated software:

See the blog post for all the details.


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