drag-racer-track-v2

Bill of Materials

Electronics

• 1x Mainboard PCB. For KiCad files, see the circuit directory of this repo.
• 2x Adafruit beam-break 3mm sensors
• 4x SparkFun RJ45 breakouts with SparkFun RJ45 conectors
• 2x Adafruit 1.2” 4x7 segment LED displays w/ I2C backpack
• 1x Adafruit 1.3” OLED display
• 2x SPDT breadboard switch
• 2x Raspberry Pi Pico
• 2x 1N4001 diodes
• 1x 7805 voltage regulator
• 1x 0.22-0.33µF capacitor
• 1x 0.1µF capacitor
• 11x 220Ω resistors
• 5x single-color LEDs
• 3x COMMON ANODE RGB LEDs
• 1x 2cm x 8cm perfboard
• 1x 3cm x 7cm perfboard
• 3x 12mm breadboard pushbuttons, with the bottom nubs snipped off so they lay flat
• 1x Adafruit Perma-Proto Bonnet Mini
• 2x micro servos
• 1x piezo buzzer
• 1x 4xAA battery holder
• 1x 9V battery clip
• 2x Ethernet cables, one at least 13 feet long
• Assorted DuPont headers

3D-printed parts

From the CAD folder or this Onshape document:

• end_cap_left
• end_cap_center
• end_cap_right
• start_cap_left
• start_cap_center
• start_cap_right

All of these should fit on a Prusa MK4S and can be printed out of PLA. Each should have a fairly obviously correct orientation. They shouldn’t need supports.

Other parts

• 12x #4-40 McMaster heat-set inserts
• Assorted 1/2in #4-40 standoffs
• Assorted #4-40 bolts (including button caps for the battery pack)

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