Horn for small passive buzzer

thingiverse

I use small passive buzzers with young people, typically connecting them to a BBC micro:bit to create sounds and play musical notes. They are very quiet, and I prefer it that way - 30 loud buzzers at once would be overwhelming. For a recent project, I placed the buzzers inside a box, so I needed a way to direct the sound so it wouldn't get lost inside. I designed this simple horn to slot over the buzzer, which effectively does the job and also improves the quality of the sound.