DIY Helium Hotspot Case For Raspberry Pi 3B 4 RAK2245

thingiverse

Hi everyone! This is my take on a 3d printed case for the DIY helium hotspot! Perfect small size fits almost everywhere, even on narrow window stills. All 3 DIY hotspot designs are uploaded, and also 2 "lid" options (Helium text or no text) If you have any questions or design improvement recommendations, please feel free to leave a comment here or contact me on Discord: bottxrnife#7160 . Tips are also appreciated. How to print: -Print in PETG or ABS (Preferably PETG as it is has a lot less warp, PLA is fine if used indoors not under direct sunlight) -30% infill, 3 shells is fine. -0.2mm layer height -90degree support overhang angle (supports should only be on the power port) BOM: 1x RPI 3b or 4b 1x RAK2245 Pi Hat 4x m3x8 Screws (The case holes are optimized, no heat inserts are needed!) 1-2x 30mm fans (Choose according to config) 1x IPEX to SMA connector (for connecting external antennas) 1x USB connector (May or may not be needed, depending on how you connect the fan(s)) 4x m2.5x8 screws (completely optional, I found the price to "grasp" the raspberry pi tight enough" (not listed are antennas, choose your favorite 915mhz one! The one that comes with the RAK2245 is no good) There are 3 designs: Helium Hotspot Dual Fans - This version allows you to mount 2 fans to the case, giving you the maximum airflow in my tests. Recommended if you're running this outdoors or if your location often gets to very high temperatures. There is an opening for an external GPS (not really needed unless if your location has very spotty GPS signal), you can connect any SMA GNSS antenna. Airflow has been calculated and optimized for vertical mounting. Helium Hotspot Single Fan int GPS (Recommended) - This version is the single fan version, with vents near the other side to compensate. I find that this version would be enough for most setups. There is not an opening for an external GPS, so you would need to mount the GNSS that came with the RAK2245 inside the case. Helium Hotspot Dual Fans int GPS - Same version as the First one, except no opening for external GPS. To build it: 1. Make sure that the micro sd card with everything configured is in!! 2. Mount the 30mm fan(s) on and find a way to connect it to the Raspberry Pi for power (either soldered onto 5v and GND GPIO pins or on solder them onto a USB port to connect it to the front of the Pi) 3. Test and make sure everything works 4. Put the raspberry pi in, align it with the power connector opening and connect the fan to it. 5. Mount the "lid" with the 4x m3x10 screws 6. Enjoy!! Link to CNC Case (Easel): https://easel.inventables.com/projects/aLOyzYpwb3FR3OtODOtXyw