This file was autogenerated from the mechanical parts list and digikey BOM and should consist of the same parts, just presented in a more readable format. The Digikey csv file can be uploaded to Digikey.com directly to create a shopping cart. Before you place an order, please double check that you have all parts in the right quantities.
The total cost comes out to be $1346.46 without discounts. If you are an educational builder, please join the Slack workspace and enquire about any discounts.
| short name | link | cost per part | total # req | total cost |
|---|---|---|---|---|
| wheel | Traxxas 5374X Talon Tires, Gemini Wheels, Black Chrome - Dollar Hobbyz | $34.95 | 3 | $104.85 |
| clamping mount | 1401 Series 2-Side, 2-Post Clamping Mount (43mm Width, 36mm Bore) - goBILDA | $6.99 | 6 | $41.94 |
| motor | 5203 Series Yellow Jacket Planetary Gear Motor (26.9:1 Ratio, 24mm Length 8mm REX™ Shaft, 223 RPM, 3.3 - 5V Encoder) | $42.99 | 6 | $257.94 |
| REX bore hub | 1310 Series Hyper Hub (8mm REX™ Bore) | $7.99 | 6 | $47.94 |
| 2 Hole U channel | 1120 Series U-Channel (2 Hole, 72mm Length) - goBILDA | $4.99 | 6 | $29.94 |
Cost to build these assemblies: $80.44 * 6 assemblies = $482.61
| short name | link | cost per part | total # req | total cost |
|---|---|---|---|---|
| 144mm goRail | 1109 Series goRAIL (144mm Length) - goBILDA | $5.49 | 4 | $21.96 |
| 4 Hole U channel | 1121 Series Low-Side U-Channel (4 Hole, 120mm Length) - goBILDA | $5.99 | 4 | $23.96 |
Cost to build these assemblies: $11.48 * 4 assemblies = $45.92
Cost to build these assemblies: $205.92 * 2 assemblies = $411.85
Cost to build this assembly: $243.49
| short name | link | cost per part | total # req | total cost |
|---|---|---|---|---|
| hurricane nuts | Hurricane Nut for goRAIL - 25 Pack - goBILDA | $9.99 | 1 | $9.99 |
| wire grommets | Plastic Grommet (14-1) - 12 Pack - goBILDA | $1.99 | 1 | $1.99 |
| M4 washers | Zinc Plates Steel Washer (M4 x 8mm OD) - 25 Pack - goBILDA | $1.99 | 1 | $1.99 |
| M4 nuts | Zinc Plates Steel Hex Nut (M4 x 7) - 25 Pack - goBILDA | $2.49 | 1 | $2.49 |
| M4 locknuts | Zinc Plates Steel Locknut (M4 x 7) - 25 Pack - goBILDA | $2.99 | 1 | $2.99 |
| M4x6 button screws | M4x6 Button Screw 25-pack | $2.99 | 2 | $5.98 |
| M4x10 button screws | M4x10 Button Screw 25-pack | $3.39 | 3 | $10.17 |
| M4x16 button screws | M4x16 Button Screw 25-pack | $3.79 | 2 | $7.58 |
| M4x8 socket screws | M4x8 Socket Screw 25-pack | $3.19 | 2 | $6.38 |
| M4x10 socket screws | M4x10 Socket Screw 25-pack | $3.19 | 3 | $9.57 |
| M4x1２ socket screws | M4x12 Socket Screw 25-pack | $3.19 | 1 | $3.19 |
| M4x16 socket screws | M4x16 Socket Screw 25-pack | $3.19 | 2 | $6.38 |
| M4x20 socket screws | M4x20 Socket Screw 25-pack | $3.09 | 1 | $3.09 |
Cost to build this assembly: $71.79
| short name | link | cost per part | total # req | total cost |
|---|---|---|---|---|
| A1: CAP CER 10000PF 50V X7R RADIAL | 399-9865-1-ND | $0.164 | 20 | $3.28 |
| A2: CAP ALUM 100UF 20% 50V RADIAL | 399-18272-1-ND | $0.248 | 10 | $2.48 |
| A3: CAP CER 0.1UF 50V X7R RADIAL | 399-14065-1-ND | $0.211 | 10 | $2.11 |
| A4: CAP ALUM 10UF 20% 50V RADIAL | 399-ESK106M050AC3DACT-ND | $0.162 | 10 | $1.62 |
| A5: DIODE SCHOTTKY 25V 10A TO220AC | 497-2738-5-ND | $1.93 | 2 | $3.86 |
| A6: DIODE GEN PURP 75V 300MA DO35 | 1655-1N4148CT-ND | $0.108 | 10 | $1.08 |
| A7: FUSEHOLDER BLOCKS - PCB - CLIP C | 732-11376-ND | $0.68 | 1 | $0.68 |
| A10: CONN HEADER VERT 12POS 2.54MM | TSW-104-07-F-T-ND | $1.5 | 4 | $6.0 |
| A11: CONN HEADER VERT 8POS 2.54MM | S1012E-08-ND | $0.47 | 4 | $1.88 |
| A12: CONN HDR 20POS 0.1 TIN PCB | S7078-ND | $1.3 | 1 | $1.3 |
| A13: CONN HEADER VERT 40POS 2.54MM | S9175-ND | $0.73 | 2 | $1.46 |
| A14: CONN HEADER VERT 6POS 2MM | 455-1708-ND | $0.36 | 2 | $0.72 |
| A16: CONN HEADER VERT 20POS 2.54MM | WM6548-ND | $2.52 | 1 | $2.52 |
| A17: CONN HDR 2POS 0.1 TIN PCB | S7000-ND | $0.32 | 5 | $1.6 |
| A19: TERM BLK 2P SIDE ENT 5.08MM PCB | ED2580-ND | $0.73 | 2 | $1.46 |
| A20: CONN HEADER VERT 6POS 4.2MM | 1726750613-ND | $2.27 | 6 | $13.62 |
| A21: TRANS PNP 40V 0.2A TO92-3 | 2N3906TAFSCT-ND | $0.285 | 10 | $2.85 |
| A22: RES 100 OHM 5% 1/4W AXIAL | CF14JT100RCT-ND | $0.056 | 10 | $0.56 |
| A23: RES 10K OHM 5% 1/4W AXIAL | CF14JT10K0CT-ND | $0.056 | 10 | $0.56 |
| A24: RES 4.7K OHM 5% 1/4W AXIAL | CF14JT4K70CT-ND | $0.0404 | 25 | $1.01 |
| A25: RES 0 OHM JUMPER 1/4W AXIAL | CD14ZT0R00CT-ND | $0.079 | 10 | $0.79 |
| A26: RES 68 OHM 5% 1/8W AXIAL | CF18JT68R0CT-ND | $0.045 | 10 | $0.45 |
| A27: RES 82 OHM 5% 1/4W AXIAL | CF14JT82R0CT-ND | $0.056 | 10 | $0.56 |
| A28: RES 1K OHM 5% 1/4W AXIAL | CF14JT1K00CT-ND | $0.056 | 10 | $0.56 |
| A29: RES 680 OHM 5% 1/4W AXIAL | CF14JT680RCT-ND | $0.056 | 10 | $0.56 |
| A30: RES 220 OHM 5% 1/4W AXIAL | CF14JT220RCT-ND | $0.056 | 10 | $0.56 |
| A32: SWITCH SLIDE DIP SPDT 50MA 24V | CT206124-ND | $1.25 | 1 | $1.25 |
| A37: LED BAR GRAPH 10SEG 570NM GRN | 754-2186-ND | $3.26 | 2 | $6.52 |
| A38: IC REG LINEAR 3.3V 750MA TO220-3 | 576-2235-ND | $3.02 | 2 | $6.04 |
| B1: FUSE GLASS 10A 125VAC 5X20MM | F3631-ND | $1.21 | 2 | $2.42 |
| B9: SWITCH TOGGLE ON-OFF-ON | 708-3060-ND | $3.28 | 1 | $3.28 |
| B11: TERM BLOCK HDR 24POS VERT 5MM | ED1682-24-ND | $3.33 | 1 | $3.33 |
| A9: TERM BLOCK HDR 6POS VERT 3.5MM | WM25701-ND | $2.02 | 3 | $6.06 |
| B2: TERM BLOCK PLUG 6POS STR 3.5MM | WM13033-ND | $2.59 | 3 | $7.77 |
Cost to build this assembly: $90.8
These parts you may either already have, depend on where you're located for a good deal, depend on personal preference, or are optional. As a result they are not accounted for in the total price.
Note: Make sure to go through the list below to make sure you have everything you need.
The electronics of the rover consist of two boards: the brain board and the motor board. To order these boards we suggest that you order from JLCPCB, this PCB fabrication company is quite inexpensive for this board size and has good turnaround time. You'll either have to order the required minimum of 10 pieces or you can ask on the Slack group whether someone wants to put in a group order or already has some extras. Upload the .zip files individually and make sure the following settings are set:
The body plates that attach to all sides of the body are designed to be made from laser cut acrylic, MDF, hardwood, or similar. The 2D cutout files are the .dxf files in the laser cut parts folder. They were designed to be around 3mm thick (1/8"). You can choose a material and cut them at your local makerspace's laser cutter or order them from an online service like Sculpteo or SendCutSend. Check the README in that folder for more details.
This is technically not a requirement, especially if you're planning on making the rover autonomous, but is highly recommended. Any USB based option should work here.
Some options are getting an XBox controller with a usb dongle or for longer range; the pricier Spektrum WS2000 with Spektrum DXs transmitter. Many alternatives exist and will work ok.
You'll want these to mount the PCBs to the rover body. Many options exist here, for example this kit.
We recommend getting spools of 18AWG (red and black), 20AWG (white, red, black) and 22AWG wire (4 colors). The wire has to be stranded and not solid core as it will bend during operation. For each wire type, if possible, get ribbon cable where each wire is attached to another one which will help with keeping wiring clean and manageable.
To protect the cables from chafing against the sharp aluminum parts, we recommend cable sleeves. You can also use grommets, filing down the sharp edges or burs, applying tape to the edges, or using expandable wire sleeving.
Heat shrink is a must have for keeping cables nice and snug.
Take a look at the wiring overview to get an idea of what you will be building. You'll need crimps and connectors for DuPont, Bullet, XT30, JST, and Molex styles. Crimping doesn't have a 100% success rate, so we recommend getting extras or buying a kit if you're planning on using them for other projects as well. Here are some options for each set you need:
- A Raspberry Pi ribbon cable, e.g. from Adafruit but available in many places. While you could use header pins for this connection, the cable is the cleanest solution
- XT30 connectors for the power connections on the motor PCB.
- DIY options, either:
- premade from GoBilda: 2x male leads, 2x female leads
- 6 4-pin JST connections:
- 6 6-pin Molex PCI-E connections. Digikey carries a couple options. In either case, be sure to get enough for 6 connectors.
- housings and pins
- assemblies are sometimes available but the 16 AWG wire may be difficult to work with
- 4 3-pin DuPont and 8 4-pin DuPont connectors
- DuPont connector kit
- Buy precrimped wires+connectors from various sources
- 12 female 3.5mm Bullet connectors. Make sure you're getting the right size connectors and ones that come insulated.
- GoBilda has various combinations available that you can cut/solder/crimp. They use 16AWG wire which is on the thicker side. Make sure you're getting the Female connector type.
- Buy a DIY kit
- The GoBilda connector pack is good quality but only has 5 female connectors so you would need 3 of them.
- from Amazon (insulators are flimsy but ok)
You will want threadlocker for several screws so that they don't unscrew themselves while driving. You can find this everywhere, for example at Gobilda. Make sure you get blue as opposed to red so it's not permanent.
- A combination nut driver will save you time screwing and unscrewing (lock)nuts inside the body.
- You'll need 2.5mm and 3mm hex keys for the button and socket M4 screws respectively. For example Gobilda 2.5 and Gobilda 3.
- A crimping tool for Molex, JST, DuPont connectors. A regular crimping tool should be able to handle all of these without issue. While you can technically complete a crimp without a crimping tool, it often won't be as consistent or strong as with a proper crimper. Various connector sets come with a decent crimper.
- Voltage Regulators:
- 1 X 5V Regulator: [Pololu] (https://www.pololu.com/product/2881)
- 1 X 12V Regulator: Pololu
- 1 X PCA9685 corner: Mouser
- 3 X Roboclaw 2x7A Motor Controller Basic Micro
- 1 X Power Measurement Unit INA260: Sold out on DigiKey, possible replacements are on Adafruit
- 1 X PCA9685 corner motor driver Mouser
- DC power meter: Amazon. This LCD display reads out current, voltage, power, and energy, and can be put on the back where the rectangular hole is in the laser cut cover.
- batteries: many options available here. We recommend getting LiPo batteries. You'll need a battery that can provide over 14V(*), so a 4s battery works well. You can get batteries with various mAh ratings (how many milliAmperes the battery can output for 1 hour). We recommend any option over 4000mAh. Higher capacity comes at a higher cost. You can also get more than one battery and swap them out. The rover can carry them as well.
- Zeee sells many options on Amazon
- You'll also need a charger for the battery. Make sure it can support the battery you bought. For the Zeee options, this model from Amazon will work.
- Consider getting a fireproof battery bag. LiPo batteries are extremely flammable/explosive and a fire caused by a battery is extremely difficult to put out.
- You'll also need a way to connect your battery to the PCB via a XT30 connector (MH-FC) which depends on the battery you get. Often these come with the charger for the battery
- A Raspberry Pi 3 or 4. Other options may work as well, but we recommend starting here.
(*) The reason you need 14V is that the 12V regulator needs a dropout voltage on top of the output voltage in order to provide 12V. A 12V battery will not work adequately.
Parts can become out of stock or discontinued in the future. In this case, the part list can be modified by editing parts_list.csv, which covers all the mechanical parts, digikey_bom.csv, which covers most of the electrical part, and extra_parts.md to cover the rest. After doing so, you can compile to update the README.md file using csv_to_md.py (The compilation will also happen automatically with a merge). Do not edit README.md directly, as it will be overwritten by the compilation process.