Sealing
- IP67 cable glands as needed.
- EPDM / silicone gasket material.
- Panel-mount USB bulkheads as needed.
- SMA bulkhead connector for LoRa antenna pass-through.
Bill of materials
GAR-BOT BOM
Hardware, electronics, printed parts, and water-resistant finishing materials for the current K2Aley GAR-BOT build. This page keeps the visible website BOM aligned with the package files.
4direct-drive 24V wheel motors and IBT-2 motor drivers.
2front claws with one servo controller per claw.
38verified STL files for printable parts.
0Arduino Pro Mini in the active transmitter design.
Real Hardware References
These photos match the major components listed in the BOM.
Hardware BOM
| Category | Qty | Part | Purpose |
|---|---|---|---|
| Controller | 1 | Raspberry Pi 5 with Wi-Fi | Main robot computer; Wi-Fi for SSH, setup, and local API/touchscreen service. |
| Controller | 1 | RP5 relay HAT | Accessory switching. |
| Controller | 1 | Pico Voice board / voice hardware | Voice path on RP5 40-pin header. |
| Interface | 1 | 7 inch USB touchscreen | Local dashboard and control display. |
| Drive | 4 | XD-60GA775-style 24V gear motor | Direct-drive wheel motors; one motor per wheel. |
| Drive | 4 | IBT-2 / BTS7960 motor driver | One H-bridge per motor. |
| Drive | 0 | Chain / sprocket drive | Removed from active GAR-BOT design; use direct-drive wheel motors and splash shields. |
| Power | 2 | 12V LiFePO4 battery | 24V-class series pack. |
| Power | 1 | Main fuse | Battery positive protection. |
| Power | 1 | Emergency stop switch | Kill 24V load bus. |
| Power | 1 | 24V-to-5V 5A buck converter | Raspberry Pi power. |
| Power | 1 | 24V-to-5V/6V servo buck | Two-claw servo power. |
| Power | 1 | Common ground block | Shared logic ground. |
| Claws | 2 | Keyestudio PLUS-style controller board | One USB servo controller per claw. |
| Claws | 12 | Servo motors | Six servos per claw board. |
| Claws | 2 | USB cables | RP5 to left and right claw boards. |
| Radio | 1 | DX-LR30 / DX-PJ26 / SX1262 LoRa module | Long-range control/status. |
| Radio | 1 | STM32F103C8Tx radio bridge | Radio bridge MCU. |
| Remote | 1 | Raspberry Pi Zero 2 W with Wi-Fi | Remote transmitter computer; Wi-Fi for SSH, Picovoice setup, and LAN command tests. |
| Remote | 1 | Pico Voice board | Voice input, buttons, speaker/headset path. |
| Remote | 1 | LoRa transmitter module or LoRa USB bridge | Sends commands to GAR-BOT. |
| Remote | 1 | 5V battery bank / regulator | Remote transmitter power. |
| Remote | 1 | Handheld transmitter enclosure | Holds remote boards, battery, and LoRa. |
| Remote | 0 | Arduino Pro Mini / old joystick PCB | Removed from active transmitter design. |
3D Printed Parts BOM
All printed parts are in `downloads/GAR-BOT_STL_Files.zip` and pass the current STL mesh audit.
| Stage | Qty | Part Numbers | Printable Files / Modules | Purpose |
|---|---|---|---|---|
| Frame | 1 each | #8-#15 | side rails, crossmembers, skid plate, battery tray, electronics deck, claw bridge | Main chassis and forward shoulder structure. |
| Sealed body | 1 each | #16-#18 | electronics bay, gasketed lid, cable gland panel | Sealed RP5 electronics compartment. |
| Drive/power | 4 / 1-2 | #19-#22 | IBT-2 driver covers, buck converter cover, motor splash shields, drip-loop clips | Protects direct-drive motors, drivers, power conversion, and wire exits. |
| Touchscreen | 1 each | #23-#27 | touchscreen bezel, rain hood, left/right uprights, top bar | Mounts and protects the 7 inch USB touchscreen. |
| Two claws | 2 sets | #28-#38 | base mounts, shoulder pivots, servo pockets, wrist cradles, palms, fingers, links, gear guards, wire covers, controller covers | Left and right front claw assemblies. |
| Remote | 1 each | #39-#42 | remote case front/back, LoRa antenna bulkhead, LoRa bulkhead guard | RP Zero 2 W + Pico Voice remote transmitter enclosure. |
| Branding | 1-2 each | #43-#45 | K2Aley lid badge, K2Aley side badge, water warning badge | Branding and wet-use warning labels. |
Water-Resistance Materials
Protection
- Conformal coating for PCB splash protection.
- Dielectric grease for connector corrosion protection.
- Stainless screws for wet-use areas.
- Heat-set inserts for repeatable service access.