K9 Button Panel… Which layout?

Bob Clough managed to get our Prusa 3D printer working again, so I am back to printing out parts of my K9. One of the parts is the K9 button panel, which is mounted on K9’s rear.

Doctor Who's K9, Buttons on the rear of the back.
Doctor Who’s K9, Buttons on the rear of the back.

Looking at the images I have assembled of K9’s timeline, I have the following three clear photos of the rear buttons.

I prefer the layout from the Doctor Who episode “Search Out Science”, but I am not a massive fan of the third handle located on K9’s back just in front of the panel, so since there is a level of inspired by, I am sure that I can skip that, and use real buttons on the panel.

Please comment below if people are aware of other layouts from the TV shows and films that I have missed on the K9 timeline page.

In the original models, the K9 buttons are not buttons; they are indicator lamps. However, rather than printing my own, I will use my 24v DC illuminated buttons and replace the incandescent bulbs with LEDS.

The two small red square “screens” on K9’s button panel are also not screens, they seem to also be indicator lamps.

I’m writing software to read the buttons’ status, run patterns across the rear, and probably repurpose the red “screens” as I2C screens that can display simple graphics and configuration information (probably driven by the buttons).

K9 Button Arduino software

This will be written in Wokwi, so you can run it in the browser as the code develops.

The K9 button panel will have a dedicated Arduino Uno, directly connected to the primary SBC (single board computer) controlling K9.

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