Quantity   Component name
1 × $2.29 Wemos ESP8266 https://www.aliexpress.com/item/10pcs-D1-mini-Mini-NodeMcu-4M-bytes-Lua-WIFI-Internet-of-Things-development-board-based-ESP8266/32651256441.html?spm=2114.13010608.0.0.B1ipZs
1 × $1.50 PCB Board Version 15 of the PCB. Added 7805 to allow for 2 series Li Ion battery input. Order from OSH Park
1 × 0.005 x 2 Resistor TH 120 Ohm https://www.aliexpress.com/item/100pcs-1-4W-5-Carbon-Film-Resistor-110-120-130-150-180-ohm/32835738578.html?spm=2114.search0104.3.1.7b8e963bEcjNrC&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10068_10130_10890_10547_319_10546_317_10548_10545_10696_453_10084_454_10083_10618_431_10307_537_536_10059_10884_10887_100031_321_322_10103-10890,searchweb201603_51,ppcSwitch_0&algo_expid=dc97dc70-3391-406f-b36c-d5d0e6f71c77-0&algo_pvid=dc97dc70-3391-406f-b36c-d5d0e6f71c77&transAbTest=ae803_4
1 × $0.19 1.5mm pitch ZH connector and wire harness to connect the motors to the PCB. https://www.aliexpress.com/item/100-SETS-Mini-Micro-ZH-1-5-4-Pin-Female-Male-ZH-Connector-with-Wires-Cables/32495987411.html?spm=2114.13010608.0.0.CURQ2f
4 × REMOVED! $0.06 x 4 Plastic Rivet obsolete. Consider replacing wtih 3d print https://www.aliexpress.com/item/20pcs-White-Plastic-Paper-book-binding-screw-post-book-picture-binding-rivet/32710959097.html?spm=a2g0s.9042311.0.0.27424c4dLncKzd
4 × REMOVED ! $0.12 x 4 Metal Chicago screws for gear axle replace with 3d print https://www.aliexpress.com/item/50PCS-M5-4-5-6-8-10-12-15-125mm-Nickel-Plated-Iron-Rivet-Book-Picture/32788054484.html?spm=a2g0s.9042311.0.0.27424c4dLncKzd
8 × $0.04 x 8 R2064 Nylon rivets for PC Board https://www.aliexpress.com/item/R2064-Nylon-rivets-for-PC-Board-Pass-ROHS-1000-pieces/795610636.html?spm=a2g0s.9042311.0.0.27424c4dXsb3vR
1 × $0.22 L293D Motor Driver https://www.aliexpress.com/item/Free-shipping-L293D-L293-DIP-in-stock/32223790200.html?spm=2114.search0104.3.48.4bb05adcQjXZd4&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10068_10130_10890_10547_319_10546_317_10548_10545_10696_453_10084_454_10083_10618_431_10307_537_536_10059_10884_10887_100031_321_322_10103,searchweb201603_51,ppcSwitch_0&algo_expid=3658184f-8b18-4720-b69f-9e39cabff852-7&algo_pvid=3658184f-8b18-4720-b69f-9e39cabff852&transAbTest=ae803_4
1 × $1.50 8"x8" acrylic 2.7mm 9 sheets of 16"x32" http://petersenplastics.com/item/color-cast-acrylic-opaque/
1 × $0.07 7805 Voltage regulator. https://www.aliexpress.com/item/Free-Shipping-100pcs-Tattoo-Rubber-Grommets-Assorted-Color/32695417572.html?spm=2114.13010608.0.0.0mSv35
2 × $0.096x 2 ITR9608 Opto Interrupter https://www.aliexpress.com/item/Free-shipping-10pcs-ITR9608-ITR-9608-DIP-4-Opto-photo-Interrupter-Optical-Sensor-DIP4-Best-quality/32379829408.html?spm=2114.10010108.1000014.2.30f134213yFdRG&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.13338.112237.000000000000000&scm_id=1007.13338.112237.000000000000000&scm-url=1007.13338.112237.000000000000000&pvid=7e5030b3-1104-455e-9820-f567756a3aa1
1 × $0.07 Switch for on off. 1218 switch https://www.aliexpress.com/item/10Pcs-Interruptor-on-off-mini-Slide-Switch-SS12d00G4-3pin-1P2T-High-quality-toggle-switch-Handle-length/32721058946.html?spm=a2g0s.9042311.0.0.27424c4dJpDXVU
1 × $0.70 x 2 Worm gear Micro Motor https://www.aliexpress.com/item/Wholesale-20pcs-DC-1V-5V-Worm-gear-micro-motor-DC-motor-10-150RPM-with-encoder-and/1922682321.html?spm=a2g0s.9042311.0.0.27424c4dbwaedX
1 × 0.005 x 2 Resistor TH 270K https://www.aliexpress.com/item/100pcs-1-4W-5-Carbon-Film-Resistor-270K-300K-330K-360K-390K-ohm/32834085692.html?spm=2114.search0104.3.23.338f1d3b0Ca0hm&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10068_10130_10890_10547_319_10546_317_10548_10545_10696_453_10084_454_10083_10618_431_10307_537_536_10059_10884_10887_100031_321_322_10103-10890,searchweb201603_51,ppcSwitch_0&algo_expid=ef728bab-06c3-479b-925b-644bfae47ca7-3&algo_pvid=ef728bab-06c3-479b-925b-644bfae47ca7&transAbTest=ae803_4