I unplug at the PC end with the large USB plug. We seem to be of a similar vintage. I had a similar box from the OU while doing my undergraduate work, but they wanted it back, unfortunately. I’m currently porting the 7-seg idea to a Waveshare colour Pico display which works much better as the colour is included in the pixel command and you only have to go through the bits once. I will put it up on Instructables once it is finished. A ‘Workout’ for the board is here:
WaveShare Pico LCD-1.8 Display Workout : 14 Steps (with Pictures) - Instructables
Just been having a go with a new screen from WaveShare Pico 1.3" 240x240 with a very tiny font from framebuf. Driver provided not as a library but a class in Micropython demo - very easy to use. You can just cut n paste the bits you need directly into your program and not waste space on drivers you do not need for that project.
I converted Les Wright’s font system to work with it and added a x3 size. (Thanks again - so very useful!)
A 600+ line program and a load of editing in Thonny did not cause any random pixels or loss of connection!
You can see videos and code here:
WS Pico 1.3" IPS LCD 240x240 Display Workout : 14 Steps - Instructables
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