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.

Hardware BOM 3D Printed Parts Markdown BOM CSV BOM
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.

RP5 relay HAT stack
IBT-2 motor drivers
24V to 5V buck converter
Claw servo controller
24V gear motor
Remote boards

## 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

### Sealing

- IP67 cable glands as needed.
- EPDM / silicone gasket material.
- Panel-mount USB bulkheads as needed.
- SMA bulkhead connector for LoRa antenna pass-through.

### 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.

### Files

- Markdown BOM
- CSV BOM
- Assembly/user manual
- Numbered fit map