Bill of Materials
Part List
The total cost for building a BearCart from the listed items below is around $250. Although, you can always find cheaper replacement for pretty much every single item in the list.
| Item | Description | Qty. | Unit Price |
|---|---|---|---|
| MEW4 1/16 RC Car | Powered by brushed 390 motor | 1 | $98.88 |
| Raspberry Pi 51 | SBC for running AI autopilot and other Python scripts | 1 | $60.00 |
| RPi Camera V22 | Eye of the BearCart, 8-megapixel | 1 | $12.50 |
| Camera Cable3 | 200mm 22 pin to 15 pin | 1 | $1.20 |
| Raspberry Pi 27W Power Supply | Delivers a maximum of 5.1V, 5A to RPi 5 | 1 | $13.60 |
| Micro-HDMI to Standard HDMI Cable | Connect monitor to RPi 5 | 1 | $5.56 |
| MicroSD Card | 64GB, U3, A2 | 1 | $11.27 |
| Raspberry Pi Pico | Microcontroller listens to RPi commands and controls drivetrain | 1 | $5.00 |
| Micro USB Cable | Micro-USB to USB-A, data capable | 1 | $2.67 |
| QUICRUN 1060 ESC4 | 60 Amp continuous current and a 6V3A BEC integrated | 1 | $21.99 |
| Wireless Game Pad5 | Bluetooth | 1 | $19.99 |
| Adjustable Buck Converter6 | 6V - 32V to 1.5V - 32V | 1 | $12.49 |
| Lever Wire Splitter | 2-in, 4-out | 1 | $1.59 |
| T-Plug Connector | One pair of male and female, bridges battery and ESC | 1 | $1.60 |
| Male JST Plug Connector Wires | Connect voltage converter and RPi | 1 | $0.33 |
| Female JST Plug Connector Wires | Connect voltage converter and RPi | 2 | $0.33 |
| Dupont Jumper Wires, Male to Female | Connect Pico and drivetrain | 4 | < $0.1 |
| Dupont Jumper Wires, Male to Male | Connect Pico and drivetrain | 4 | < $0.1 |
| M2*15 Female Standffs | Attach Pico to the bed | 4 | < $0.1 |
| M2*6 Screws | Secure units | 14 | < $0.1 |
| M2 Nuts | Secure units | 6 | < $0.1 |
| M2.5*15 Male-Female Standoffs | Lift PCBs up | 8 | < $0.1 |
| M2.5 Nuts | secure screws and standoffs on the bed | 16 | < $0.1 |
| M2.5*6 Screws | Attach PCBs to the bed | 12 | < $0.1 |
| M2.5*16 Screws | Attach wire splitter to the bed | 2 | < $0.1 |
| 3D Printed Bed | Hosts above components | 1 | ~ $1.21 |
| 3D Printed Camera Mount | Holds RPi camera | 1 | < $0.1 |
1: 8GB RAM and accessories are optional
2: V1, V3 or V4 cameras are fine
3: Don't be tricked by the Display Cable
4: Electronic speed controller. Other brands and products are OK, but make sure the unit DOES NOT have radio receiver (antenna) integrated.
5: Any generic gamepad on the market should work. Get a bluetooth one if you want your BearCart and the gamepad to be one-on-one tethered (You'll want this when you are managing multiple BearCarts).
6: Get a dedicated DC-DC Buck converter with 5V/8A output, if not interested in monitoring the battery health or need more space on the board.
Peripherals
We recommend beginners to connect following peripherals to the Raspberry Pi. For advanced users/developers, they are optional.
| Item | Requirement | Qty. |
|---|---|---|
| Monitor | Has HDMI port | 1 |
| Keyboard | USB connector | 1 |
| Mouse | USB connector | 1 |