Marika and I are back at her parents' house until we move to my next postdoc, and I've noticed something about the clock/timer on their stove. If I stand too close, the curve of the front cover blocks the tops of the digits:
Generally I'm able to read the time while only seeing the bottoms of the digits, and it got me wondering about the amount of information carried in each segment.
Digital clocks use 7-segment LEDs, which are laid out like this:
Now we can imagine removing one or more columns from that table, and see which digits are still distinguishable. I put together a Python script to try out all the possibilities, but I struggled to find a good way to show all 126 of them. I settled on an animated GIF:
Turning to the situation above, the available digits are fairly slim: