This bracket replaces your Nerf Rapidstrike CS-18's upper sling mount with dual 128x64 OLED displays.
Just print, add displays, open your Rapidstrike, remove the sling mount, and slot the bracket into place.
Use thick walls - I printed this with 2mm walls and 2mm top/bottom layers.
I printed this in ABS, 0.4mm nozzle, 0.2mm layer height. Your mileage may vary. I recommend avoiding PLA for this print, because it's difficult to adhere the displays and it can become brittle in the cold.
If you're using ABS, I recommend a raft. Because of the weird angles in the model, almost everything touching the bed will be support material.
These brackets are designed for common, inexpensive I2C-only SSD1306 breakouts. More complex breakouts, such as Adafruit's model and boards with a reset line, won't fit.
- Disassemble your Rapidstrike and remove the upper sling mount.
- Aggressively clean up your printed bracket. Remove all traces of support material, trim down any rough edges, and file off any over-extrusion. Test-fit your bracket in your blaster.
- If your SSD1306 displays came with headers installed, desolder them.
- Solder long wires to your displays and trim down the joints.
- Move one display's address-selector jumper, so the displays have different I2C addresses.
- Apply your adhesive of choice to the back of the upper display. I used 3M VHB tape.
- Feed the upper display's wires through their hole on the bracket. Note that the displays are mounted upside-down.
- Press the upper display into position.
- Repeat steps 6, 7, and 8 with the lower display.
- If necessary, wait for your adhesive to cure.
- Gently slide the bracket into the blaster. It should fit identically to the stock sling mount point.
- Route, trim, and prepare your wires. Because these displays use I2C, you can wire the displays in parallel.
- Optional: Apply some Sugru or other rubberized material to the corners of the displays to protect against cracking.
I got the critical dimensions by cutting the Rapidstrike's upper sling mount into pieces, measuring them, and replicating them in SCAD.