Quantity   Component name
3 × Arduino Uno
1 × Arduino Motor Shield
1 × Sunkee DC-DC Converter Module Step up and down In 3.5-28V Out 1.25-26V Adjustable (LM2596S+LM2577S) DC converter module--available on amazon.com for about $9.00
5 × Supercapacitors / Ultracapacitors 350F 2.7Volts
2 × Nextrox Mini 12V DC 60 RPM High Torque Gear Box Electric Motor
2 × TOOGOO(R) 37mm DC Geared Motor Mounting Bracket Holder + 6mm Hex Coupling
1 × DROK® 0.56'' DC 3-30V Digital Voltmeter Voltage Tester Gauge Green Bright LED Display Two Wires Volt Meter for Solar Battery Mon Optional, but useful
2 × Eureka vacuum belts Treads for wheels
2 × Pololu IR beacon
1 × Boost Converter Available on Amazon https://www.amazon.com/gp/product/B00DWX8PM2/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1
3 × Super Capcitors/UltraCapacitors 3000 farad @ 2.7 volt Available from tecategroup.com
1 × Pixy Camera Available from Amazon.com
1 × Gikfun 200 times audio amplifier
1 × Adafruit speaker, 3' diameter 8 ohm
1 × MOVI Arduino Shield speech recognizer