LowJungle

LowJungle

A low profile, ~65% keyboard, with:

• Hot swappable sockets
• Per key RGB backlight
• Wifi & BLE (but no battery)
• Integrated 3 port USB Hub

Links:

• Onshape: Case
• Keyboard Layout Editor: Layout

Firmware

For testing: KMK
For production: QMK

Circuitpython is soooo much nicer for finding errors in the hardware
Status KMK: Pins are correct, keymap is WIP

PCB

• Schematic
• No relevant ERC & DRC errors
• Size: 371.48mm x 133.35mm
• VCC for backlight LEDs can be controlled by the ESP32 using 2 mosfets
• Used libraries:
  • Marbastlib, needs to be installed as plugin
  • easyeda2kicad, needs to be installed separately, used for downloading LCSC schematics & footprints
    • Download C2913204, C192893, C2891732, C778164, C2988369, C8547, C503996, C82942 using easyeda2kicad --full --lcsc_id=<id> (one-by-one, yes...)
  • 0_Custom, included in the libraries folder, should load automatically

Fabrication

I'm print all parts myself using the large scale 3D printer (Billig) I'm build for infill.

Download the latest revision from Onshape. STLs included with this repo are only meant as a backup if the onshape link ever stops working.

• Largest part: 380mmx145mm
• Recommended settings:
  • 6 wall loops
  • 6 solid top & bottom layers
  • 40% infill
• Notes:
  • LowJungle-Backplate-V2.stl: Should be solid
  • LowJungle-Bumper-Bottom-V2.stl: Print with TPU, 3x
  • LowJungle-Bumper-Top-V2.stl: 4x
  • LowJungle-Frame-V2.stl: Manually place tree supports for the USB connector cutouts

BOM

PCB: $36.34 at JLCPCB

Switches: Aliexpress: Gateron KS33 low-profile red, 90 for $38.63 => 0.43 per switch

Keycaps: Aliexpress: Low profile set, 143 lily version, $21.61

Stabilizers: Aliexpress: Gateron low-profile stabilizer set, 4x 2u 1x 6.25u, $13.79

Fasteners:

Total: $6,67

MCU:

Note: The ESP32S3 implementation is the same as in my Hackpad. Thus the cost can be drastically reduced when combining both LCSC orders:

• -$3: Removed handling fee
• -$6: Random shipping coupon
• and often times the MOQ from hackpad also covers this project

Total (without combined order): $11.46
Total (with combined order): $6.01

Note: Combined LCSC order will be around ~$28 (including shipping) for both hackpad and hackboard

Misc Electronics:

Total: $11.88

Other parts:

Total: $13,76

BOM total

Fasteners: $6,67 PCB: $36.34
Switches: $38.63
Keycaps: $21.61
Stabilizers: $13.79
MCU: $6.01
Misc Electronics: $11.88
Other parts: $13,76

Total: $148,69

Note: Aliexpress prices are only valid until 26. March (15. anniversary sale) => If the grant is issued after 24. March, it would be awesome to have ~$15 buffer for changed prices. The unused amount would be returned to HackClub.