PCB Box with Snap Fit Hinge Lid
thingiverse
This is a simple enclosure designed specifically for holding custom PCBs that utilize optocouplers and an MCP23017 port-expander to monitor 24VAC output on 16 channels over i2c. The address of the board is fully selectable, allowing it to be daisy-chained with up to 7 other boards for a total of 128 sensing channels. Each individual board also has 4 separate channels that do not pass through the port expander but can still be polled using any digital pin. For more detailed information on this project, check out my Hackaday page at https://hackaday.io/project/26202-16-channel-24vac-detection-over-i2c The PCB itself measures 93.5mm x 63mm x 13mm as shown in the image. The mounting holes are 4mm and spaced 7.25mm apart, both horizontally and vertically from the corners. A standout feature of this enclosure is its snap-fit hinges, which provide a secure and durable connection. These hinges are specifically designed for use with Esun PLA+, but can be adjusted as needed by modifying the claspCut variable. The box itself can also be scaled to fit different PCBs, however it's recommended that the claspCut variable be modified accordingly to ensure a proper fit. Unfortunately, the SCAD code used to create this design is currently a bit messy.
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