I know these are on the general market already, but have you considered making one that would be compatible with the Robo-Tank HATs & cases? (https://www.amazon.com/gp/product/B0CBJYWKJ1/) The SD card is, IMHO, by far the weakest point in the system due to write exhaustion. An SSD offers much better longevity and resilience. Expanding the depth of the lower half of the v3 case would allow adding the card. They connect via 3 pins on the reverse side of the Pi for power, and via a USB bridge for signal.
It would entail having to modify the case to add it on. I see a few ways to do this:
It would entail having to modify the case to add it on. I see a few ways to do this:
- With the board I linked, or one you mfg'd similar, the bottom of the case could be extended sufficiently and that's it. Done. Or;
- A little more ambitious, but extend the overall interior depth of the case up to about 40mm (currently ~30mm). This provides enough room for the M.2 expansion board. It would also allow for mounting a 60mm fan on the interior of the case such as a Noctua NF-A6x25 5V PWM. Or;
- Most ambitiously, increase the interior depth to around, and this is a guesstimate, 50-55mm. We can easily fit the SSD expansion board. We ALSO have sufficient interior room to mount a 40mm (Noctua NF-A4x20 5V PWM) on the interior on the side next to the 12v-24v DC Power input blowing ACROSS the Pi and the M.2. Combine that with a PWM script, such as https://github.com/mklements/PWMFanContr...rtional.py, and we have a PWM cooling fan that is nearly silent on a Pi with SSD longevity. Finally, add 'ears' to the side of the bottom clamshell, and we can mount case under the tank without having to resort to double sided tape. :P
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