*Parts on Amazon*
Resistors (feel free to order a cheaper set, but make sure you get both 10K and 15K resistors):
https://www.amazon.com/gp/product/B00...

Wires:
https://www.amazon.com/Ribbon-Cable-1...

Multimeters:
https://www.amazon.com/s/ref=nb_sb_no...

JST connectors (optional):
https://www.amazon.com/GeeBat-JST-XHP...

Arduino Jumper Wires:
https://www.amazon.com/Haitronic-Mult...

Soldering iron:
https://www.amazon.com/Weller-SP40NUS...

Check out my the last Maker Select Auto Bed Leveling video here:
   • Monoprice Maker Select | Auto Bed Lev...  

Peter Grace's Inductive Sensor Voltage Divider video:
   • Video