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Step 2Working out the layout
I started by drawing a grid over the keypad, and filling in the cells that I wanted to be pressed at the same time (first image).
Then, looking at how these were actually arranged, it seemed easiest to fill in gaps between adjacent keys that need to be pressed (second image).
And, to ensure that the device lined up correctly with the keypad, i.e. no incorrect keys were pressed, it seemed sensible to put a frame of sorts along two edges (third image).
Then, looking at how these were actually arranged, it seemed easiest to fill in gaps between adjacent keys that need to be pressed (second image).
And, to ensure that the device lined up correctly with the keypad, i.e. no incorrect keys were pressed, it seemed sensible to put a frame of sorts along two edges (third image).
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