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Floppy Clicker SAO

Why not add a "retro" sound or two to your badge?

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Looking at some relays for sale at a good price... an idea was formed. Inspired by the HDD clickers, add a retro floppy drive "inspired" clicks sound to your badge. Clicks can be automated by reacting I2C traffic or by dedicated I2C commands.

Finally adding to HackADay... the Floppy Clicker! 

Add a click to any I2C traffic on the I2C bus or just trigger your favorite clicks and tones on demand.

The limit is only how long the relay will last... something tells me they were not quite intended for this use case. 


Build Instructions for all revisions: Floppy-Clicker-SAO/docs/revisions.md at main · DmitryPustovit/Floppy-Clicker-SAO 

Full docs and code will continue to be updated at the linked Github.

There will be a Tindie posting as well in case folks want to get one as well.


For the Development Edition (Rev 1.0) there are debug headers.

  • 1 × HK4100F Relay Relay
  • 1 × 3v Buzzer
  • 1 × Red LED
  • 1 × Green LED
  • 1 × Tactile Push Button

View all 15 components

  • Update 01

    Dmitry Pustovit11/11/2025 at 05:25 0 comments

    Finally posting on HackADay... Took me long enough huh? 

    Version Updates

    Have been having a ton of fun iterating the design already and I think I have both a rev 1.2 and maybe even a 2.0 worked out. (Major and Minor version bumps are determined entirely by feeling in case you were wondering.) 

    To the folks who go one at Supercon, I hope you enjoy! 

    Let me know how it was assembly and to interact with.

    Actual Project Background

    I like the idea of giving an SAO unique functionality centered around a theme. Lately I've been working with floppy disks a bit to archive (or try my best to) some old data from years ago. That got me reminiscent of the old clicks and whirls you could hear from Floppy Disk drives and old HDDs. 

    I had gotten a similar idea last year at Supercon and had even gotten part of the way to a prototype before I'd gotten distracted with something else. 

    Then I saw a video about the HDD Clicker and other similar products designed to give older computers now running on modern flash storage their retro sound back. The idea came back to mind, and I got to ordering parts and designing a PCB right away... is what I would like to say. In reality I ordered a bunch of parts and then promptly got distracted again.

    This is how a lot of my free time projects go... Eventually they get done.

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Discussions

Andy Geppert wrote 11/17/2025 at 05:44 point

I appreciate this mechanical SAO! There is a lot of thought that has gone into it, and one thing I'd like to learn more about is how you implemented the battery to prevent hammering on the SAO power rail when the relay pulls in. I'm wondering if the technique you used here could help stabilize the power use in mt Core4 SAO, which uses [short] pulses of about 400 mA which is a bit much for must SAO power supplies to handle. I've thought about capacitors as a solution...

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