OpenAPS项目案例:Raspberry Pi 0W与RFM69HCW搭配
OpenAPS Case - Raspberry Pi 0W with RFM69HCW
2024-03-24 04:33:41
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This is an OpenAPS belt clip case for a Raspberry Pi 0W with a wired RFM69HCW. The power control, battery connection, and belt clip designs are highly specific to my use case, as I designed them around parts I already had laying around. However, the organization of the system and the overall concept is applicable for others to design from.
Notes on the aspects specific to me:
- The battery charge controller was taken from a portable battery back for other Lithium-based batteries.
- The battery contacts were taken from other battery packs for AA's or AAA's.
- The belt clip was leftover from the Animas pumps I used previous to looping.
Some notes about this design:
- The system is a Raspberry Pi 0W, with a RFM69HCW soldered via connecting wires.
- The batteries are a pair of 18650 cells in parallel for extra run time between charges.
- There's a dedicated channel for holding the antenna on the RFM69HCW. The diameter is specific to the wire I used.
- There's space reserved for the micro USB plug for powering the Pi.
- The spaces for the Pi and the power controller have diamond shapes cut out for heat dissipation. In my case, it also serves for observing the status LEDs on the power controller.
- The antenna side cap, includes a "peep hole" to see the light from power LED on the Pi.
- The same cap also includes two pairs of holes to place bare copper wires exposed to the outside of the case. These are wired and soldered to pins 5 and 6 of the GPIO to serve as the power button. This should be rarely needed, hence the lack of a real button. The main goal was to keep it low profile. Should this be needed, I just use something metal to touch the two wires together.
This was designed in OnShape. You can see the original model here:
https://cad.onshape.com/documents/1e359f3ba644dc6ea35fdb51/w/be00e70f42a18d4e5abc3f7d/e/af65fd2023ad0224a3691240
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