I wanted to try a flat and fixed design again, because it can be much smaller and more robust (being transported in a bag with other items without special care) at the same time.
To decide on the geometry and to test whether I can bear an untented keyboard (yes, I can, but only if something more comfortable is not available) I built a flat keyboard from existing parts and some scrap wood:
The keyboard is usable in a wide range of situations (table, lap on a chair, lap on couch with outstretched legs, on top of a laptop) and includes
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palmrests
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several smartphone mounts
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storage space
Keyboard on top of a laptop (13" screen):
Those three little darker discs at the left rear are two LEDs (charging indicator, status indicator) and a reset button.
The smartphone is held suprisingly well (even on a train or bus) which is why I didn’t include additional pins on the left and right of it, which where meant to keep it in place.
