180pcs M3 Nylon Spacers Screws Nuts Hexagon Studs Box Kit

L298N Dual H Bridge Stepper Motor Driver Board with High current output and onboard 5V Regulator.

TB-1505 15A Iron Terminal Connector

49Inline DC-DC Buck Converter Step Down 4.75V-24V to 1V-17V 1.8A(max < 1 minute) 1.2Amp Constant current.

Low Power PWM motor driver

1803BK 1203BK 5A PWM DC Motor Speed Controller

MT3608 2A MAX DC-DC Step Up Power Booster Module with USB Type C interface.

USB 1.1- 2.0 Type B ( Square Downstream ) Connector to Pin Conveter 

1.25V - 37V Output @ 3A DC-DC 3-40V Input Step Down Adjustable Power Supply 3A peek power, 2A constant current.