SQFMI Watchy Case

thingiverse

This is a case for what's advertised as "Watchy smartwatch," but it's really just a rip-off from here to Alaska and back again. I wasted $55 on that devkit, which doesn't even come with basic functional firmware, and is too fragile to tinker with, so I had to create a case before I could start hacking on it. The case is still Work-In-Progress (and might stay that way), but it should fit the watchy hardware inside. There are three pieces to the case (fourth one is under development): * CaseBottom.stl - print as is. This is the bottom of the case, where the battery goes. Put a little piece of foam (or even 2x3cm cutout from a kitchen towel) over the battery to cushion it against the PCB that will come on top. * CaseMidFrame.stl - print it on its top surface, where the eInk display comes to rest on it. You'll have to unplug the display from the PCB to assemble this. * CaseTopFrame.stl is the display frame, print it laying on its top surface, you may need some supports for the corner holes. If you have trouble with that, I can make a version without countersunk screw heads, it prints easier, but the screws protrude. * What's missing is a subframe with buttons, the design I made didn't work, so right now you have to press the buttons with your fingernail. If I manage to get a working design, I'll post an update. You'll need 4× screws for plastic, ∅2mm, 12mm long. They're often sold as "M2 plastic screws," which they aren't (M2 is machine thread, not plastic thread), but the Chinese dealers of things like that don't care. ## Assembly 1. Disconnect eInk display from the board 2. Put the display in the top frame. It should have a little wiggle room 3. Put the display ribbon through the slot in the mid frame and join the top two frames together. Put two screws through the corner holes to register the assembly. 4. Put the board into its recess, threading the display ribbon through its slot (see picture). 5. Reinsert ribbon into the ZIF socket 6. Attach battery, put it in the bottom case part. Put a layer of cushion (not depicted) on top of the battery, put the halves together. Screw together. 7. The wriststrap threads through slots in the base. The whole thing is block square, but so is the HW design unfortunately, not much leeway there, as the main design hiccup is threading the display ribbon connection through a slot in PCB that's intended for strap use and overpopulating PCB backside, where the battery goes (so you need a bigger gap between the PCB and the battery).