This is a list of parts from US suppliers with < 1 week shpping times. These are (mostly) the exact SKUs I purchased when designing and building the raceway. Prices are accurate as of when I ordered the, but may have changes since. In many cases, I purchased kits with multiple connectors or parts to experiment with. Not counting "consumables" like screws, nuts, wire and wiring connectors, two 4-lane tracks can be built with readily availale parts for about $140. If you're willing to wait for shipping from China, you could obtain the same parts for under $90. All prices include shipping, but not taxes. Note: I'm an Amazon Prime member, non Prime members may incur additional shipping costs."
| Item | # | Each | Total | Vendor |
|---|---|---|---|---|
| Starting Gates | ||||
| Raspberry Pi Zero W[H] | 2 | $14.95 | $29.90 | https://www.pishop.us/product/raspberry-pi-zero-wireless-wh-pre-soldered-header/ |
| 1.3" LCD Display Hat | 2 | $17.28 | $34.56 | https://www.amazon.com/gp/product/B07FDQVYFM |
| Zero Prototyping pHAT | 2 | $6.95 | $13.90 | https://www.pishop.us/product/zero-prototyping-phat-zero/ |
| TCRT5000 IR Reflective Sensor Modules | 8 | (10 for 12.99) | $12.99 | https://www.amazon.com/gp/product/B081RPJ44L |
| MG90S Servo | 2 | (2 for 9.99) | $9.99 | https://www.amazon.com/Maxmoral-Upgraded-Digital-Vehicle-Helicopter/dp/B07NV476P7 |
| Finish Lines | ||||
| ESP32 ESP-32S Development Board | 2 | (2 for 14.89) | $14.89 | https://www.amazon.com/dp/B07Q576VWZ/ |
| 4-Channel IR Line Tracking Sensor Module | 2 | $4.39 | $8.78 | https://www.amazon.com/dp/B07Q2HRXN4 |
| 2.54 MM Right Angled IDC Receptacle - 2 Position | 2 | $0.54 | $1.08 | https://www.digikey.com/en/products/detail/w-rth-elektronik/661002152222/10239727 |
| 2.54 MM Right Angled IDC Receptacle - 5 Position | 2 | $0.76 | $1.52 | https://www.digikey.com/en/products/detail/w-rth-elektronik/661005152222/10239742 |
| IDC Receptacle Shipping | $4.99 | |||
| Assembly | ||||
| M4-0.7 Metal Threaded Heat Set Screw Inserts | 1 | 9.99 | https://www.ebay.com/itm/292173878339 | |
| M4 x 0.7mm SS Nylon Lock Nuts | 1 | $5.99 | https://www.amazon.com/gp/product/B075ZZD3NN | |
| M4 x 0.7 x 10 SS Flat Head Socket Cap Screws | 1 | $7.46 | https://www.ebay.com/itm/222695733073 | |
| M4 x 0.7 x 10 SS Allen Head Socket Cap Screws | 1 | $8.05 | https://www.ebay.com/itm//152158936608 | |
| M2.5 Standoff Kit Brass | 1 | $18.99 | https://www.amazon.com/gp/product/B06XX28ZZR | |
| Tools and Wiring | ||||
| Crimping Tool Kit w/ Dupont & JST-XH Connectors | 1 | $29.99 | https://www.amazon.com/gp/product/B07ZK5F8HP | |
| SN-01BM Crimping Tool | 1 | $22.99 | https://www.amazon.com/gp/product/B00YGLKBSK | |
| 10 feet ribbon cable | 1 | $6.86 | https://www.amazon.com/gp/product/B007R9SQQM | |
| Right Angle JST XA-SMT connectors | 10 | $15.99 | https://www.amazon.com/gp/product/B085QLMZMP |
| Item | # | Each | Total | Vendor |
|---|---|---|---|---|
| Starting Gates | ||||
| Raspberry Pi Zero W[H] | 2 | $14.95 | $29.90 | https://www.pishop.us/product/raspberry-pi-zero-wireless-wh-pre-soldered-header/ |
| 1.3" LCD Display Hat - 2 pack | 1 | 23.79 | 23.79 | https://www.ebay.com/i/264844157433 |
| Zero Prototyping pHAT | 2 | $6.95 | $13.90 | https://www.pishop.us/product/zero-prototyping-phat-zero/ |
| TCRT5000 IR Reflective Sensor Modules | 8 | (8 @ $0.40 + $2.61 shipping) | $5.81 | https://www.aliexpress.com/item/1005001841063508.html |
| MG90S Servo | 2 | (2 @ 1.39 2.47 shipping) | $5.52 | https://www.aliexpress.com/item/1005002071884212.html |
| Finish Lines | ||||
| ESP32 ESP-32S Development Board | 2 | (2 for 9.69) | $9.69 | https://www.aliexpress.com/item/32864722159.html |
| 4-Channel IR Line Tracking Sensor Module | 2 | $2.94 | https://www.aliexpress.com/item/33007862609.html |